Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (102 commits)
  [SCSI] scsi_dh: fix kconfig related build errors
  [SCSI] sym53c8xx: Fix bogus sym_que_entry re-implementation of container_of
  [SCSI] scsi_cmnd.h: remove double inclusion of linux/blkdev.h
  [SCSI] make struct scsi_{host,target}_type static
  [SCSI] fix locking in host use of blk_plug_device()
  [SCSI] zfcp: Cleanup external header file
  [SCSI] zfcp: Cleanup code in zfcp_erp.c
  [SCSI] zfcp: zfcp_fsf cleanup.
  [SCSI] zfcp: consolidate sysfs things into one file.
  [SCSI] zfcp: Cleanup of code in zfcp_aux.c
  [SCSI] zfcp: Cleanup of code in zfcp_scsi.c
  [SCSI] zfcp: Move status accessors from zfcp to SCSI include file.
  [SCSI] zfcp: Small QDIO cleanups
  [SCSI] zfcp: Adapter reopen for large number of unsolicited status
  [SCSI] zfcp: Fix error checking for ELS ADISC requests
  [SCSI] zfcp: wait until adapter is finished with ERP during auto-port
  [SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver
  [SCSI] sg: Add target reset support
  [SCSI] lib: Add support for the T10 (SCSI) Data Integrity Field CRC
  [SCSI] sd: Move scsi_disk() accessor function to sd.h
  ...

43 files changed, 8086 insertions, 1553 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 81ccbd7f9e34..26be540d1dd3 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -888,6 +888,25 @@ config SCSI_IBMVSCSIS
 	  To compile this driver as a module, choose M here: the
 	  module will be called ibmvstgt.
 
+config SCSI_IBMVFC
+	tristate "IBM Virtual FC support"
+	depends on PPC_PSERIES && SCSI
+	select SCSI_FC_ATTRS
+	help
+	  This is the IBM POWER Virtual FC Client
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ibmvfc.
+
+config SCSI_IBMVFC_TRACE
+	bool "enable driver internal trace"
+	depends on SCSI_IBMVFC
+	default y
+	help
+	  If you say Y here, the driver will trace all commands issued
+	  to the adapter. Performance impact is minimal. Trace can be
+	  dumped using /sys/class/scsi_host/hostXX/trace.
+
 config SCSI_INITIO
 	tristate "Initio 9100U(W) support"
 	depends on PCI && SCSI
@@ -1738,10 +1757,12 @@ config SCSI_SUNESP
 	select SCSI_SPI_ATTRS
 	help
 	  This is the driver for the Sun ESP SCSI host adapter. The ESP
-	  chipset is present in most SPARC SBUS-based computers.
+	  chipset is present in most SPARC SBUS-based computers and
+	  supports the Emulex family of ESP SCSI chips (esp100, esp100A,
+	  esp236, fas101, fas236) as well as the Qlogic fas366 SCSI chip.
 
 	  To compile this driver as a module, choose M here: the
-	  module will be called esp.
+	  module will be called sun_esp.
 
 config ZFCP
 	tristate "FCP host bus adapter driver for IBM eServer zSeries"
@@ -1771,4 +1792,6 @@ endif # SCSI_LOWLEVEL
 
 source "drivers/scsi/pcmcia/Kconfig"
 
+source "drivers/scsi/device_handler/Kconfig"
+
 endmenu
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 6c775e350c98..a8149677de23 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_SCSI_ISCSI_ATTRS)	+= scsi_transport_iscsi.o
 obj-$(CONFIG_SCSI_SAS_ATTRS)	+= scsi_transport_sas.o
 obj-$(CONFIG_SCSI_SAS_LIBSAS)	+= libsas/
 obj-$(CONFIG_SCSI_SRP_ATTRS)	+= scsi_transport_srp.o
+obj-$(CONFIG_SCSI_DH)		+= device_handler/
 
 obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER) 	+= libiscsi.o
@@ -118,6 +119,7 @@ obj-$(CONFIG_SCSI_IPR)		+= ipr.o
 obj-$(CONFIG_SCSI_SRP)		+= libsrp.o
 obj-$(CONFIG_SCSI_IBMVSCSI)	+= ibmvscsi/
 obj-$(CONFIG_SCSI_IBMVSCSIS)	+= ibmvscsi/
+obj-$(CONFIG_SCSI_IBMVFC)	+= ibmvscsi/
 obj-$(CONFIG_SCSI_HPTIOP)	+= hptiop.o
 obj-$(CONFIG_SCSI_STEX)		+= stex.o
 obj-$(CONFIG_SCSI_MVSAS)	+= mvsas.o
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 5fd83deab36c..a7355260cfcf 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -41,6 +41,7 @@
 #include <linux/kthread.h>
 #include <linux/semaphore.h>
 #include <asm/uaccess.h>
+#include <scsi/scsi_host.h>
 
 #include "aacraid.h"
 
@@ -581,6 +582,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			for (i = 0; i < upsg->count; i++) {
 				u64 addr;
 				void* p;
+				if (upsg->sg[i].count >
+				    (dev->adapter_info.options &
+				     AAC_OPT_NEW_COMM) ?
+				      (dev->scsi_host_ptr->max_sectors << 9) :
+				      65536) {
+					rcode = -EINVAL;
+					goto cleanup;
+				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA);
 				if(!p) {
@@ -625,6 +634,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			for (i = 0; i < usg->count; i++) {
 				u64 addr;
 				void* p;
+				if (usg->sg[i].count >
+				    (dev->adapter_info.options &
+				     AAC_OPT_NEW_COMM) ?
+				      (dev->scsi_host_ptr->max_sectors << 9) :
+				      65536) {
+					rcode = -EINVAL;
+					goto cleanup;
+				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
 				if(!p) {
@@ -667,6 +684,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			for (i = 0; i < upsg->count; i++) {
 				uintptr_t addr;
 				void* p;
+				if (usg->sg[i].count >
+				    (dev->adapter_info.options &
+				     AAC_OPT_NEW_COMM) ?
+				      (dev->scsi_host_ptr->max_sectors << 9) :
+				      65536) {
+					rcode = -EINVAL;
+					goto cleanup;
+				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
 				if(!p) {
@@ -698,6 +723,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			for (i = 0; i < upsg->count; i++) {
 				dma_addr_t addr;
 				void* p;
+				if (upsg->sg[i].count >
+				    (dev->adapter_info.options &
+				     AAC_OPT_NEW_COMM) ?
+				      (dev->scsi_host_ptr->max_sectors << 9) :
+				      65536) {
+					rcode = -EINVAL;
+					goto cleanup;
+				}
 				p = kmalloc(upsg->sg[i].count, GFP_KERNEL);
 				if (!p) {
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 68c140e82673..9aa301c1ed07 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -865,7 +865,7 @@ static ssize_t aac_show_bios_version(struct device *device,
 	return len;
 }
 
-ssize_t aac_show_serial_number(struct device *device,
+static ssize_t aac_show_serial_number(struct device *device,
 			       struct device_attribute *attr, char *buf)
 {
 	struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
diff --git a/drivers/scsi/device_handler/Kconfig b/drivers/scsi/device_handler/Kconfig
new file mode 100644
index 000000000000..2adc0f666b68
--- /dev/null
+++ b/drivers/scsi/device_handler/Kconfig
@@ -0,0 +1,32 @@
+#
+# SCSI Device Handler configuration
+#
+
+menuconfig SCSI_DH
+	tristate "SCSI Device Handlers"
+	depends on SCSI
+	default n
+	help
+	  SCSI Device Handlers provide device specific support for
+	  devices utilized in multipath configurations. Say Y here to
+	  select support for specific hardware.
+
+config SCSI_DH_RDAC
+	tristate "LSI RDAC Device Handler"
+	depends on SCSI_DH
+	help
+	If you have a LSI RDAC select y. Otherwise, say N.
+
+config SCSI_DH_HP_SW
+	tristate "HP/COMPAQ MSA Device Handler"
+	depends on SCSI_DH
+	help
+	If you have a HP/COMPAQ MSA device that requires START_STOP to
+	be sent to start it and cannot upgrade the firmware then select y.
+	Otherwise, say N.
+
+config SCSI_DH_EMC
+	tristate "EMC CLARiiON Device Handler"
+	depends on SCSI_DH
+	help
+	If you have a EMC CLARiiON select y. Otherwise, say N.
diff --git a/drivers/scsi/device_handler/Makefile b/drivers/scsi/device_handler/Makefile
new file mode 100644
index 000000000000..35272e93b1c8
--- /dev/null
+++ b/drivers/scsi/device_handler/Makefile
@@ -0,0 +1,7 @@
+#
+# SCSI Device Handler
+#
+obj-$(CONFIG_SCSI_DH)		+= scsi_dh.o
+obj-$(CONFIG_SCSI_DH_RDAC)	+= scsi_dh_rdac.o
+obj-$(CONFIG_SCSI_DH_HP_SW)	+= scsi_dh_hp_sw.o
+obj-$(CONFIG_SCSI_DH_EMC)	+= scsi_dh_emc.o
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c
new file mode 100644
index 000000000000..ab6c21cd9689
--- /dev/null
+++ b/drivers/scsi/device_handler/scsi_dh.c
@@ -0,0 +1,162 @@
+/*
+ * SCSI device handler infrastruture.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright IBM Corporation, 2007
+ *      Authors:
+ *               Chandra Seetharaman <sekharan@us.ibm.com>
+ *               Mike Anderson <andmike@linux.vnet.ibm.com>
+ */
+
+#include <scsi/scsi_dh.h>
+#include "../scsi_priv.h"
+
+static DEFINE_SPINLOCK(list_lock);
+static LIST_HEAD(scsi_dh_list);
+
+static struct scsi_device_handler *get_device_handler(const char *name)
+{
+	struct scsi_device_handler *tmp, *found = NULL;
+
+	spin_lock(&list_lock);
+	list_for_each_entry(tmp, &scsi_dh_list, list) {
+		if (!strcmp(tmp->name, name)) {
+			found = tmp;
+			break;
+		}
+	}
+	spin_unlock(&list_lock);
+	return found;
+}
+
+static int scsi_dh_notifier_add(struct device *dev, void *data)
+{
+	struct scsi_device_handler *scsi_dh = data;
+
+	scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_ADD_DEVICE, dev);
+	return 0;
+}
+
+/*
+ * scsi_register_device_handler - register a device handler personality
+ *      module.
+ * @scsi_dh - device handler to be registered.
+ *
+ * Returns 0 on success, -EBUSY if handler already registered.
+ */
+int scsi_register_device_handler(struct scsi_device_handler *scsi_dh)
+{
+	int ret = -EBUSY;
+	struct scsi_device_handler *tmp;
+
+	tmp = get_device_handler(scsi_dh->name);
+	if (tmp)
+		goto done;
+
+	ret = bus_register_notifier(&scsi_bus_type, &scsi_dh->nb);
+
+	bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_add);
+	spin_lock(&list_lock);
+	list_add(&scsi_dh->list, &scsi_dh_list);
+	spin_unlock(&list_lock);
+
+done:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(scsi_register_device_handler);
+
+static int scsi_dh_notifier_remove(struct device *dev, void *data)
+{
+	struct scsi_device_handler *scsi_dh = data;
+
+	scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_DEL_DEVICE, dev);
+	return 0;
+}
+
+/*
+ * scsi_unregister_device_handler - register a device handler personality
+ *      module.
+ * @scsi_dh - device handler to be unregistered.
+ *
+ * Returns 0 on success, -ENODEV if handler not registered.
+ */
+int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh)
+{
+	int ret = -ENODEV;
+	struct scsi_device_handler *tmp;
+
+	tmp = get_device_handler(scsi_dh->name);
+	if (!tmp)
+		goto done;
+
+	ret = bus_unregister_notifier(&scsi_bus_type, &scsi_dh->nb);
+
+	bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh,
+					scsi_dh_notifier_remove);
+	spin_lock(&list_lock);
+	list_del(&scsi_dh->list);
+	spin_unlock(&list_lock);
+
+done:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(scsi_unregister_device_handler);
+
+/*
+ * scsi_dh_activate - activate the path associated with the scsi_device
+ *      corresponding to the given request queue.
+ * @q - Request queue that is associated with the scsi_device to be
+ *      activated.
+ */
+int scsi_dh_activate(struct request_queue *q)
+{
+	int err = 0;
+	unsigned long flags;
+	struct scsi_device *sdev;
+	struct scsi_device_handler *scsi_dh = NULL;
+
+	spin_lock_irqsave(q->queue_lock, flags);
+	sdev = q->queuedata;
+	if (sdev && sdev->scsi_dh_data)
+		scsi_dh = sdev->scsi_dh_data->scsi_dh;
+	if (!scsi_dh || !get_device(&sdev->sdev_gendev))
+		err = SCSI_DH_NOSYS;
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	if (err)
+		return err;
+
+	if (scsi_dh->activate)
+		err = scsi_dh->activate(sdev);
+	put_device(&sdev->sdev_gendev);
+	return err;
+}
+EXPORT_SYMBOL_GPL(scsi_dh_activate);
+
+/*
+ * scsi_dh_handler_exist - Return TRUE(1) if a device handler exists for
+ *	the given name. FALSE(0) otherwise.
+ * @name - name of the device handler.
+ */
+int scsi_dh_handler_exist(const char *name)
+{
+	return (get_device_handler(name) != NULL);
+}
+EXPORT_SYMBOL_GPL(scsi_dh_handler_exist);
+
+MODULE_DESCRIPTION("SCSI device handler");
+MODULE_AUTHOR("Chandra Seetharaman <sekharan@us.ibm.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
new file mode 100644
index 000000000000..ed53f14007a2
--- /dev/null
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -0,0 +1,499 @@
+/*
+ * Target driver for EMC CLARiiON AX/CX-series hardware.
+ * Based on code from Lars Marowsky-Bree <lmb@suse.de>
+ * and Ed Goggin <egoggin@emc.com>.
+ *
+ * Copyright (C) 2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2006 Mike Christie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <scsi/scsi.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_dh.h>
+#include <scsi/scsi_device.h>
+
+#define CLARIION_NAME			"emc_clariion"
+
+#define CLARIION_TRESPASS_PAGE		0x22
+#define CLARIION_BUFFER_SIZE		0x80
+#define CLARIION_TIMEOUT		(60 * HZ)
+#define CLARIION_RETRIES		3
+#define CLARIION_UNBOUND_LU		-1
+
+static unsigned char long_trespass[] = {
+	0, 0, 0, 0,
+	CLARIION_TRESPASS_PAGE,	/* Page code */
+	0x09,			/* Page length - 2 */
+	0x81,			/* Trespass code + Honor reservation bit */
+	0xff, 0xff,		/* Trespass target */
+	0, 0, 0, 0, 0, 0	/* Reserved bytes / unknown */
+};
+
+static unsigned char long_trespass_hr[] = {
+	0, 0, 0, 0,
+	CLARIION_TRESPASS_PAGE,	/* Page code */
+	0x09,			/* Page length - 2 */
+	0x01,			/* Trespass code + Honor reservation bit */
+	0xff, 0xff,		/* Trespass target */
+	0, 0, 0, 0, 0, 0	/* Reserved bytes / unknown */
+};
+
+static unsigned char short_trespass[] = {
+	0, 0, 0, 0,
+	CLARIION_TRESPASS_PAGE,	/* Page code */
+	0x02,			/* Page length - 2 */
+	0x81,			/* Trespass code + Honor reservation bit */
+	0xff,			/* Trespass target */
+};
+
+static unsigned char short_trespass_hr[] = {
+	0, 0, 0, 0,
+	CLARIION_TRESPASS_PAGE,	/* Page code */
+	0x02,			/* Page length - 2 */
+	0x01,			/* Trespass code + Honor reservation bit */
+	0xff,			/* Trespass target */
+};
+
+struct clariion_dh_data {
+	/*
+	 * Use short trespass command (FC-series) or the long version
+	 * (default for AX/CX CLARiiON arrays).
+	 */
+	unsigned short_trespass;
+	/*
+	 * Whether or not (default) to honor SCSI reservations when
+	 * initiating a switch-over.
+	 */
+	unsigned hr;
+	/* I/O buffer for both MODE_SELECT and INQUIRY commands. */
+	char buffer[CLARIION_BUFFER_SIZE];
+	/*
+	 * SCSI sense buffer for commands -- assumes serial issuance
+	 * and completion sequence of all commands for same multipath.
+	 */
+	unsigned char sense[SCSI_SENSE_BUFFERSIZE];
+	/* which SP (A=0,B=1,UNBOUND=-1) is dflt SP for path's mapped dev */
+	int default_sp;
+	/* which SP (A=0,B=1,UNBOUND=-1) is active for path's mapped dev */
+	int current_sp;
+};
+
+static inline struct clariion_dh_data
+			*get_clariion_data(struct scsi_device *sdev)
+{
+	struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
+	BUG_ON(scsi_dh_data == NULL);
+	return ((struct clariion_dh_data *) scsi_dh_data->buf);
+}
+
+/*
+ * Parse MODE_SELECT cmd reply.
+ */
+static int trespass_endio(struct scsi_device *sdev, int result)
+{
+	int err = SCSI_DH_OK;
+	struct scsi_sense_hdr sshdr;
+	struct clariion_dh_data *csdev = get_clariion_data(sdev);
+	char *sense = csdev->sense;
+
+	if (status_byte(result) == CHECK_CONDITION &&
+	    scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) {
+		sdev_printk(KERN_ERR, sdev, "Found valid sense data 0x%2x, "
+			    "0x%2x, 0x%2x while sending CLARiiON trespass "
+			    "command.\n", sshdr.sense_key, sshdr.asc,
+			     sshdr.ascq);
+
+		if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) &&
+		     (sshdr.ascq == 0x00)) {
+			/*
+			 * Array based copy in progress -- do not send
+			 * mode_select or copy will be aborted mid-stream.
+			 */
+			sdev_printk(KERN_INFO, sdev, "Array Based Copy in "
+				    "progress while sending CLARiiON trespass "
+				    "command.\n");
+			err = SCSI_DH_DEV_TEMP_BUSY;
+		} else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) &&
+			    (sshdr.ascq == 0x03)) {
+			/*
+			 * LUN Not Ready - Manual Intervention Required
+			 * indicates in-progress ucode upgrade (NDU).
+			 */
+			sdev_printk(KERN_INFO, sdev, "Detected in-progress "
+				    "ucode upgrade NDU operation while sending "
+				    "CLARiiON trespass command.\n");
+			err = SCSI_DH_DEV_TEMP_BUSY;
+		} else
+			err = SCSI_DH_DEV_FAILED;
+	} else if (result) {
+		sdev_printk(KERN_ERR, sdev, "Error 0x%x while sending "
+			    "CLARiiON trespass command.\n", result);
+		err = SCSI_DH_IO;
+	}
+
+	return err;
+}
+
+static int parse_sp_info_reply(struct scsi_device *sdev, int result,
+		int *default_sp, int *current_sp, int *new_current_sp)
+{
+	int err = SCSI_DH_OK;
+	struct clariion_dh_data *csdev = get_clariion_data(sdev);
+
+	if (result == 0) {
+		/* check for in-progress ucode upgrade (NDU) */
+		if (csdev->buffer[48] != 0) {
+			sdev_printk(KERN_NOTICE, sdev, "Detected in-progress "
+			       "ucode upgrade NDU operation while finding "
+			       "current active SP.");
+			err = SCSI_DH_DEV_TEMP_BUSY;
+		} else {
+			*default_sp = csdev->buffer[5];
+
+			if (csdev->buffer[4] == 2)
+				/* SP for path is current */
+				*current_sp = csdev->buffer[8];
+			else {
+				if (csdev->buffer[4] == 1)
+					/* SP for this path is NOT current */
+					if (csdev->buffer[8] == 0)
+						*current_sp = 1;
+					else
+						*current_sp = 0;
+				else
+					/* unbound LU or LUNZ */
+					*current_sp = CLARIION_UNBOUND_LU;
+			}
+			*new_current_sp =  csdev->buffer[8];
+		}
+	} else {
+		struct scsi_sense_hdr sshdr;
+
+		err = SCSI_DH_IO;
+
+		if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE,
+							   &sshdr))
+			sdev_printk(KERN_ERR, sdev, "Found valid sense data "
+			      "0x%2x, 0x%2x, 0x%2x while finding current "
+			      "active SP.", sshdr.sense_key, sshdr.asc,
+			      sshdr.ascq);
+		else
+			sdev_printk(KERN_ERR, sdev, "Error 0x%x finding "
+			      "current active SP.", result);
+	}
+
+	return err;
+}
+
+static int sp_info_endio(struct scsi_device *sdev, int result,
+					int mode_select_sent, int *done)
+{
+	struct clariion_dh_data *csdev = get_clariion_data(sdev);
+	int err_flags, default_sp, current_sp, new_current_sp;
+
+	err_flags = parse_sp_info_reply(sdev, result, &default_sp,
+					     &current_sp, &new_current_sp);
+
+	if (err_flags != SCSI_DH_OK)
+		goto done;
+
+	if (mode_select_sent) {
+		csdev->default_sp = default_sp;
+		csdev->current_sp = current_sp;
+	} else {
+		/*
+		 * Issue the actual module_selec request IFF either
+		 * (1) we do not know the identity of the current SP OR
+		 * (2) what we think we know is actually correct.
+		 */
+		if ((current_sp != CLARIION_UNBOUND_LU) &&
+		    (new_current_sp != current_sp)) {
+
+			csdev->default_sp = default_sp;
+			csdev->current_sp = current_sp;
+
+			sdev_printk(KERN_INFO, sdev, "Ignoring path group "
+			       "switch-over command for CLARiiON SP%s since "
+			       " mapped device is already initialized.",
+			       current_sp ? "B" : "A");
+			if (done)
+				*done = 1; /* as good as doing it */
+		}
+	}
+done:
+	return err_flags;
+}
+
+/*
+* Get block request for REQ_BLOCK_PC command issued to path.  Currently
+* limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands.
+*
+* Uses data and sense buffers in hardware handler context structure and
+* assumes serial servicing of commands, both issuance and completion.
+*/
+static struct request *get_req(struct scsi_device *sdev, int cmd)
+{
+	struct clariion_dh_data *csdev = get_clariion_data(sdev);
+	struct request *rq;
+	unsigned char *page22;
+	int len = 0;
+
+	rq = blk_get_request(sdev->request_queue,
+			(cmd == MODE_SELECT) ? WRITE : READ, GFP_ATOMIC);
+	if (!rq) {
+		sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed");
+		return NULL;
+	}
+
+	memset(&rq->cmd, 0, BLK_MAX_CDB);
+	rq->cmd[0] = cmd;
+	rq->cmd_len = COMMAND_SIZE(rq->cmd[0]);
+
+	switch (cmd) {
+	case MODE_SELECT:
+		if (csdev->short_trespass) {
+			page22 = csdev->hr ? short_trespass_hr : short_trespass;
+			len = sizeof(short_trespass);
+		} else {
+			page22 = csdev->hr ? long_trespass_hr : long_trespass;
+			len = sizeof(long_trespass);
+		}
+		/*
+		 * Can't DMA from kernel BSS -- must copy selected trespass
+		 * command mode page contents to context buffer which is
+		 * allocated by kmalloc.
+		 */
+		BUG_ON((len > CLARIION_BUFFER_SIZE));
+		memcpy(csdev->buffer, page22, len);
+		rq->cmd_flags |= REQ_RW;
+		rq->cmd[1] = 0x10;
+		break;
+	case INQUIRY:
+		rq->cmd[1] = 0x1;
+		rq->cmd[2] = 0xC0;
+		len = CLARIION_BUFFER_SIZE;
+		memset(csdev->buffer, 0, CLARIION_BUFFER_SIZE);
+		break;
+	default:
+		BUG_ON(1);
+		break;
+	}
+
+	rq->cmd[4] = len;
+	rq->cmd_type = REQ_TYPE_BLOCK_PC;
+	rq->cmd_flags |= REQ_FAILFAST;
+	rq->timeout = CLARIION_TIMEOUT;
+	rq->retries = CLARIION_RETRIES;
+
+	rq->sense = csdev->sense;
+	memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
+	rq->sense_len = 0;
+
+	if (blk_rq_map_kern(sdev->request_queue, rq, csdev->buffer,
+							len, GFP_ATOMIC)) {
+		__blk_put_request(rq->q, rq);
+		return NULL;
+	}
+
+	return rq;
+}
+
+static int send_cmd(struct scsi_device *sdev, int cmd)
+{
+	struct request *rq = get_req(sdev, cmd);
+
+	if (!rq)
+		return SCSI_DH_RES_TEMP_UNAVAIL;
+
+	return blk_execute_rq(sdev->request_queue, NULL, rq, 1);
+}
+
+static int clariion_activate(struct scsi_device *sdev)
+{
+	int result, done = 0;
+
+	result = send_cmd(sdev, INQUIRY);
+	result = sp_info_endio(sdev, result, 0, &done);
+	if (result || done)
+		goto done;
+
+	result = send_cmd(sdev, MODE_SELECT);
+	result = trespass_endio(sdev, result);
+	if (result)
+		goto done;
+
+	result = send_cmd(sdev, INQUIRY);
+	result = sp_info_endio(sdev, result, 1, NULL);
+done:
+	return result;
+}
+
+static int clariion_check_sense(struct scsi_device *sdev,
+				struct scsi_sense_hdr *sense_hdr)
+{
+	switch (sense_hdr->sense_key) {
+	case NOT_READY:
+		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x03)
+			/*
+			 * LUN Not Ready - Manual Intervention Required
+			 * indicates this is a passive path.
+			 *
+			 * FIXME: However, if this is seen and EVPD C0
+			 * indicates that this is due to a NDU in
+			 * progress, we should set FAIL_PATH too.
+			 * This indicates we might have to do a SCSI
+			 * inquiry in the end_io path. Ugh.
+			 *
+			 * Can return FAILED only when we want the error
+			 * recovery process to kick in.
+			 */
+			return SUCCESS;
+		break;
+	case ILLEGAL_REQUEST:
+		if (sense_hdr->asc == 0x25 && sense_hdr->ascq == 0x01)
+			/*
+			 * An array based copy is in progress. Do not
+			 * fail the path, do not bypass to another PG,
+			 * do not retry. Fail the IO immediately.
+			 * (Actually this is the same conclusion as in
+			 * the default handler, but lets make sure.)
+			 *
+			 * Can return FAILED only when we want the error
+			 * recovery process to kick in.
+			 */
+			return SUCCESS;
+		break;
+	case UNIT_ATTENTION:
+		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
+			/*
+			 * Unit Attention Code. This is the first IO
+			 * to the new path, so just retry.
+			 */
+			return NEEDS_RETRY;
+		break;
+	}
+
+	/* success just means we do not care what scsi-ml does */
+	return SUCCESS;
+}
+
+static const struct {
+	char *vendor;
+	char *model;
+} clariion_dev_list[] = {
+	{"DGC", "RAID"},
+	{"DGC", "DISK"},
+	{NULL, NULL},
+};
+
+static int clariion_bus_notify(struct notifier_block *, unsigned long, void *);
+
+static struct scsi_device_handler clariion_dh = {
+	.name		= CLARIION_NAME,
+	.module		= THIS_MODULE,
+	.nb.notifier_call = clariion_bus_notify,
+	.check_sense	= clariion_check_sense,
+	.activate	= clariion_activate,
+};
+
+/*
+ * TODO: need some interface so we can set trespass values
+ */
+static int clariion_bus_notify(struct notifier_block *nb,
+				unsigned long action, void *data)
+{
+	struct device *dev = data;
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct scsi_dh_data *scsi_dh_data;
+	struct clariion_dh_data *h;
+	int i, found = 0;
+	unsigned long flags;
+
+	if (action == BUS_NOTIFY_ADD_DEVICE) {
+		for (i = 0; clariion_dev_list[i].vendor; i++) {
+			if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor,
+				     strlen(clariion_dev_list[i].vendor)) &&
+			    !strncmp(sdev->model, clariion_dev_list[i].model,
+				     strlen(clariion_dev_list[i].model))) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found)
+			goto out;
+
+		scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+				+ sizeof(*h) , GFP_KERNEL);
+		if (!scsi_dh_data) {
+			sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
+				    CLARIION_NAME);
+			goto out;
+		}
+
+		scsi_dh_data->scsi_dh = &clariion_dh;
+		h = (struct clariion_dh_data *) scsi_dh_data->buf;
+		h->default_sp = CLARIION_UNBOUND_LU;
+		h->current_sp = CLARIION_UNBOUND_LU;
+
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		sdev->scsi_dh_data = scsi_dh_data;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+
+		sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", CLARIION_NAME);
+		try_module_get(THIS_MODULE);
+
+	} else if (action == BUS_NOTIFY_DEL_DEVICE) {
+		if (sdev->scsi_dh_data == NULL ||
+				sdev->scsi_dh_data->scsi_dh != &clariion_dh)
+			goto out;
+
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		scsi_dh_data = sdev->scsi_dh_data;
+		sdev->scsi_dh_data = NULL;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+
+		sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n",
+			    CLARIION_NAME);
+
+		kfree(scsi_dh_data);
+		module_put(THIS_MODULE);
+	}
+
+out:
+	return 0;
+}
+
+static int __init clariion_init(void)
+{
+	int r;
+
+	r = scsi_register_device_handler(&clariion_dh);
+	if (r != 0)
+		printk(KERN_ERR "Failed to register scsi device handler.");
+	return r;
+}
+
+static void __exit clariion_exit(void)
+{
+	scsi_unregister_device_handler(&clariion_dh);
+}
+
+module_init(clariion_init);
+module_exit(clariion_exit);
+
+MODULE_DESCRIPTION("EMC CX/AX/FC-family driver");
+MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, Chandra Seetharaman <sekharan@us.ibm.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
new file mode 100644
index 000000000000..12ceab7b3662
--- /dev/null
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -0,0 +1,202 @@
+/*
+ * Basic HP/COMPAQ MSA 1000 support. This is only needed if your HW cannot be
+ * upgraded.
+ *
+ * Copyright (C) 2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2006 Mike Christie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_dh.h>
+
+#define HP_SW_NAME	"hp_sw"
+
+#define HP_SW_TIMEOUT (60 * HZ)
+#define HP_SW_RETRIES 3
+
+struct hp_sw_dh_data {
+	unsigned char sense[SCSI_SENSE_BUFFERSIZE];
+	int retries;
+};
+
+static inline struct hp_sw_dh_data *get_hp_sw_data(struct scsi_device *sdev)
+{
+	struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
+	BUG_ON(scsi_dh_data == NULL);
+	return ((struct hp_sw_dh_data *) scsi_dh_data->buf);
+}
+
+static int hp_sw_done(struct scsi_device *sdev)
+{
+	struct hp_sw_dh_data *h = get_hp_sw_data(sdev);
+	struct scsi_sense_hdr sshdr;
+	int rc;
+
+	sdev_printk(KERN_INFO, sdev, "hp_sw_done\n");
+
+	rc = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sshdr);
+	if (!rc)
+		goto done;
+	switch (sshdr.sense_key) {
+	case NOT_READY:
+		if ((sshdr.asc == 0x04) && (sshdr.ascq == 3)) {
+			rc = SCSI_DH_RETRY;
+			h->retries++;
+			break;
+		}
+		/* fall through */
+	default:
+		h->retries++;
+		rc = SCSI_DH_IMM_RETRY;
+	}
+
+done:
+	if (rc == SCSI_DH_OK || rc == SCSI_DH_IO)
+		h->retries = 0;
+	else if (h->retries > HP_SW_RETRIES) {
+		h->retries = 0;
+		rc = SCSI_DH_IO;
+	}
+	return rc;
+}
+
+static int hp_sw_activate(struct scsi_device *sdev)
+{
+	struct hp_sw_dh_data *h = get_hp_sw_data(sdev);
+	struct request *req;
+	int ret = SCSI_DH_RES_TEMP_UNAVAIL;
+
+	req = blk_get_request(sdev->request_queue, WRITE, GFP_ATOMIC);
+	if (!req)
+		goto done;
+
+	sdev_printk(KERN_INFO, sdev, "sending START_STOP.");
+
+	req->cmd_type = REQ_TYPE_BLOCK_PC;
+	req->cmd_flags |= REQ_FAILFAST;
+	req->cmd_len = COMMAND_SIZE(START_STOP);
+	memset(req->cmd, 0, MAX_COMMAND_SIZE);
+	req->cmd[0] = START_STOP;
+	req->cmd[4] = 1;	/* Start spin cycle */
+	req->timeout = HP_SW_TIMEOUT;
+	req->sense = h->sense;
+	memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE);
+	req->sense_len = 0;
+
+	ret = blk_execute_rq(req->q, NULL, req, 1);
+	if (!ret) /* SUCCESS */
+		ret = hp_sw_done(sdev);
+	else
+		ret = SCSI_DH_IO;
+done:
+	return ret;
+}
+
+static const struct {
+	char *vendor;
+	char *model;
+} hp_sw_dh_data_list[] = {
+	{"COMPAQ", "MSA"},
+	{"HP", "HSV"},
+	{"DEC", "HSG80"},
+	{NULL, NULL},
+};
+
+static int hp_sw_bus_notify(struct notifier_block *, unsigned long, void *);
+
+static struct scsi_device_handler hp_sw_dh = {
+	.name		= HP_SW_NAME,
+	.module		= THIS_MODULE,
+	.nb.notifier_call = hp_sw_bus_notify,
+	.activate	= hp_sw_activate,
+};
+
+static int hp_sw_bus_notify(struct notifier_block *nb,
+			    unsigned long action, void *data)
+{
+	struct device *dev = data;
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct scsi_dh_data *scsi_dh_data;
+	int i, found = 0;
+	unsigned long flags;
+
+	if (action == BUS_NOTIFY_ADD_DEVICE) {
+		for (i = 0; hp_sw_dh_data_list[i].vendor; i++) {
+			if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor,
+				     strlen(hp_sw_dh_data_list[i].vendor)) &&
+			    !strncmp(sdev->model, hp_sw_dh_data_list[i].model,
+				     strlen(hp_sw_dh_data_list[i].model))) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found)
+			goto out;
+
+		scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+				+ sizeof(struct hp_sw_dh_data) , GFP_KERNEL);
+		if (!scsi_dh_data) {
+			sdev_printk(KERN_ERR, sdev, "Attach Failed %s.\n",
+				    HP_SW_NAME);
+			goto out;
+		}
+
+		scsi_dh_data->scsi_dh = &hp_sw_dh;
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		sdev->scsi_dh_data = scsi_dh_data;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+		try_module_get(THIS_MODULE);
+
+		sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", HP_SW_NAME);
+	} else if (action == BUS_NOTIFY_DEL_DEVICE) {
+		if (sdev->scsi_dh_data == NULL ||
+				sdev->scsi_dh_data->scsi_dh != &hp_sw_dh)
+			goto out;
+
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		scsi_dh_data = sdev->scsi_dh_data;
+		sdev->scsi_dh_data = NULL;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+		module_put(THIS_MODULE);
+
+		sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", HP_SW_NAME);
+
+		kfree(scsi_dh_data);
+	}
+
+out:
+	return 0;
+}
+
+static int __init hp_sw_init(void)
+{
+	return scsi_register_device_handler(&hp_sw_dh);
+}
+
+static void __exit hp_sw_exit(void)
+{
+	scsi_unregister_device_handler(&hp_sw_dh);
+}
+
+module_init(hp_sw_init);
+module_exit(hp_sw_exit);
+
+MODULE_DESCRIPTION("HP MSA 1000");
+MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
new file mode 100644
index 000000000000..6fff077a888d
--- /dev/null
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -0,0 +1,691 @@
+/*
+ * Engenio/LSI RDAC SCSI Device Handler
+ *
+ * Copyright (C) 2005 Mike Christie. All rights reserved.
+ * Copyright (C) Chandra Seetharaman, IBM Corp. 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+#include <scsi/scsi.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_dh.h>
+
+#define RDAC_NAME "rdac"
+
+/*
+ * LSI mode page stuff
+ *
+ * These struct definitions and the forming of the
+ * mode page were taken from the LSI RDAC 2.4 GPL'd
+ * driver, and then converted to Linux conventions.
+ */
+#define RDAC_QUIESCENCE_TIME 20;
+/*
+ * Page Codes
+ */
+#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c
+
+/*
+ * Controller modes definitions
+ */
+#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS	0x02
+
+/*
+ * RDAC Options field
+ */
+#define RDAC_FORCED_QUIESENCE 0x02
+
+#define RDAC_TIMEOUT	(60 * HZ)
+#define RDAC_RETRIES	3
+
+struct rdac_mode_6_hdr {
+	u8	data_len;
+	u8	medium_type;
+	u8	device_params;
+	u8	block_desc_len;
+};
+
+struct rdac_mode_10_hdr {
+	u16	data_len;
+	u8	medium_type;
+	u8	device_params;
+	u16	reserved;
+	u16	block_desc_len;
+};
+
+struct rdac_mode_common {
+	u8	controller_serial[16];
+	u8	alt_controller_serial[16];
+	u8	rdac_mode[2];
+	u8	alt_rdac_mode[2];
+	u8	quiescence_timeout;
+	u8	rdac_options;
+};
+
+struct rdac_pg_legacy {
+	struct rdac_mode_6_hdr hdr;
+	u8	page_code;
+	u8	page_len;
+	struct rdac_mode_common common;
+#define MODE6_MAX_LUN	32
+	u8	lun_table[MODE6_MAX_LUN];
+	u8	reserved2[32];
+	u8	reserved3;
+	u8	reserved4;
+};
+
+struct rdac_pg_expanded {
+	struct rdac_mode_10_hdr hdr;
+	u8	page_code;
+	u8	subpage_code;
+	u8	page_len[2];
+	struct rdac_mode_common common;
+	u8	lun_table[256];
+	u8	reserved3;
+	u8	reserved4;
+};
+
+struct c9_inquiry {
+	u8	peripheral_info;
+	u8	page_code;	/* 0xC9 */
+	u8	reserved1;
+	u8	page_len;
+	u8	page_id[4];	/* "vace" */
+	u8	avte_cvp;
+	u8	path_prio;
+	u8	reserved2[38];
+};
+
+#define SUBSYS_ID_LEN	16
+#define SLOT_ID_LEN	2
+
+struct c4_inquiry {
+	u8	peripheral_info;
+	u8	page_code;	/* 0xC4 */
+	u8	reserved1;
+	u8	page_len;
+	u8	page_id[4];	/* "subs" */
+	u8	subsys_id[SUBSYS_ID_LEN];
+	u8	revision[4];
+	u8	slot_id[SLOT_ID_LEN];
+	u8	reserved[2];
+};
+
+struct rdac_controller {
+	u8			subsys_id[SUBSYS_ID_LEN];
+	u8			slot_id[SLOT_ID_LEN];
+	int			use_ms10;
+	struct kref		kref;
+	struct list_head	node; /* list of all controllers */
+	union			{
+		struct rdac_pg_legacy legacy;
+		struct rdac_pg_expanded expanded;
+	} mode_select;
+};
+struct c8_inquiry {
+	u8	peripheral_info;
+	u8	page_code; /* 0xC8 */
+	u8	reserved1;
+	u8	page_len;
+	u8	page_id[4]; /* "edid" */
+	u8	reserved2[3];
+	u8	vol_uniq_id_len;
+	u8	vol_uniq_id[16];
+	u8	vol_user_label_len;
+	u8	vol_user_label[60];
+	u8	array_uniq_id_len;
+	u8	array_unique_id[16];
+	u8	array_user_label_len;
+	u8	array_user_label[60];
+	u8	lun[8];
+};
+
+struct c2_inquiry {
+	u8	peripheral_info;
+	u8	page_code;	/* 0xC2 */
+	u8	reserved1;
+	u8	page_len;
+	u8	page_id[4];	/* "swr4" */
+	u8	sw_version[3];
+	u8	sw_date[3];
+	u8	features_enabled;
+	u8	max_lun_supported;
+	u8	partitions[239]; /* Total allocation length should be 0xFF */
+};
+
+struct rdac_dh_data {
+	struct rdac_controller	*ctlr;
+#define UNINITIALIZED_LUN	(1 << 8)
+	unsigned		lun;
+#define RDAC_STATE_ACTIVE	0
+#define RDAC_STATE_PASSIVE	1
+	unsigned char		state;
+	unsigned char		sense[SCSI_SENSE_BUFFERSIZE];
+	union			{
+		struct c2_inquiry c2;
+		struct c4_inquiry c4;
+		struct c8_inquiry c8;
+		struct c9_inquiry c9;
+	} inq;
+};
+
+static LIST_HEAD(ctlr_list);
+static DEFINE_SPINLOCK(list_lock);
+
+static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev)
+{
+	struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
+	BUG_ON(scsi_dh_data == NULL);
+	return ((struct rdac_dh_data *) scsi_dh_data->buf);
+}
+
+static struct request *get_rdac_req(struct scsi_device *sdev,
+			void *buffer, unsigned buflen, int rw)
+{
+	struct request *rq;
+	struct request_queue *q = sdev->request_queue;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	rq = blk_get_request(q, rw, GFP_KERNEL);
+
+	if (!rq) {
+		sdev_printk(KERN_INFO, sdev,
+				"get_rdac_req: blk_get_request failed.\n");
+		return NULL;
+	}
+
+	if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_KERNEL)) {
+		blk_put_request(rq);
+		sdev_printk(KERN_INFO, sdev,
+				"get_rdac_req: blk_rq_map_kern failed.\n");
+		return NULL;
+	}
+
+	memset(&rq->cmd, 0, BLK_MAX_CDB);
+	rq->sense = h->sense;
+	memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
+	rq->sense_len = 0;
+
+	rq->cmd_type = REQ_TYPE_BLOCK_PC;
+	rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE;
+	rq->retries = RDAC_RETRIES;
+	rq->timeout = RDAC_TIMEOUT;
+
+	return rq;
+}
+
+static struct request *rdac_failover_get(struct scsi_device *sdev)
+{
+	struct request *rq;
+	struct rdac_mode_common *common;
+	unsigned data_size;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	if (h->ctlr->use_ms10) {
+		struct rdac_pg_expanded *rdac_pg;
+
+		data_size = sizeof(struct rdac_pg_expanded);
+		rdac_pg = &h->ctlr->mode_select.expanded;
+		memset(rdac_pg, 0, data_size);
+		common = &rdac_pg->common;
+		rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40;
+		rdac_pg->subpage_code = 0x1;
+		rdac_pg->page_len[0] = 0x01;
+		rdac_pg->page_len[1] = 0x28;
+		rdac_pg->lun_table[h->lun] = 0x81;
+	} else {
+		struct rdac_pg_legacy *rdac_pg;
+
+		data_size = sizeof(struct rdac_pg_legacy);
+		rdac_pg = &h->ctlr->mode_select.legacy;
+		memset(rdac_pg, 0, data_size);
+		common = &rdac_pg->common;
+		rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER;
+		rdac_pg->page_len = 0x68;
+		rdac_pg->lun_table[h->lun] = 0x81;
+	}
+	common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS;
+	common->quiescence_timeout = RDAC_QUIESCENCE_TIME;
+	common->rdac_options = RDAC_FORCED_QUIESENCE;
+
+	/* get request for block layer packet command */
+	rq = get_rdac_req(sdev, &h->ctlr->mode_select, data_size, WRITE);
+	if (!rq)
+		return NULL;
+
+	/* Prepare the command. */
+	if (h->ctlr->use_ms10) {
+		rq->cmd[0] = MODE_SELECT_10;
+		rq->cmd[7] = data_size >> 8;
+		rq->cmd[8] = data_size & 0xff;
+	} else {
+		rq->cmd[0] = MODE_SELECT;
+		rq->cmd[4] = data_size;
+	}
+	rq->cmd_len = COMMAND_SIZE(rq->cmd[0]);
+
+	return rq;
+}
+
+static void release_controller(struct kref *kref)
+{
+	struct rdac_controller *ctlr;
+	ctlr = container_of(kref, struct rdac_controller, kref);
+
+	spin_lock(&list_lock);
+	list_del(&ctlr->node);
+	spin_unlock(&list_lock);
+	kfree(ctlr);
+}
+
+static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
+{
+	struct rdac_controller *ctlr, *tmp;
+
+	spin_lock(&list_lock);
+
+	list_for_each_entry(tmp, &ctlr_list, node) {
+		if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) &&
+			  (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) {
+			kref_get(&tmp->kref);
+			spin_unlock(&list_lock);
+			return tmp;
+		}
+	}
+	ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC);
+	if (!ctlr)
+		goto done;
+
+	/* initialize fields of controller */
+	memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN);
+	memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN);
+	kref_init(&ctlr->kref);
+	ctlr->use_ms10 = -1;
+	list_add(&ctlr->node, &ctlr_list);
+done:
+	spin_unlock(&list_lock);
+	return ctlr;
+}
+
+static int submit_inquiry(struct scsi_device *sdev, int page_code,
+		unsigned int len)
+{
+	struct request *rq;
+	struct request_queue *q = sdev->request_queue;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	int err = SCSI_DH_RES_TEMP_UNAVAIL;
+
+	rq = get_rdac_req(sdev, &h->inq, len, READ);
+	if (!rq)
+		goto done;
+
+	/* Prepare the command. */
+	rq->cmd[0] = INQUIRY;
+	rq->cmd[1] = 1;
+	rq->cmd[2] = page_code;
+	rq->cmd[4] = len;
+	rq->cmd_len = COMMAND_SIZE(INQUIRY);
+	err = blk_execute_rq(q, NULL, rq, 1);
+	if (err == -EIO)
+		err = SCSI_DH_IO;
+done:
+	return err;
+}
+
+static int get_lun(struct scsi_device *sdev)
+{
+	int err;
+	struct c8_inquiry *inqp;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry));
+	if (err == SCSI_DH_OK) {
+		inqp = &h->inq.c8;
+		h->lun = inqp->lun[7]; /* currently it uses only one byte */
+	}
+	return err;
+}
+
+#define RDAC_OWNED	0
+#define RDAC_UNOWNED	1
+#define RDAC_FAILED	2
+static int check_ownership(struct scsi_device *sdev)
+{
+	int err;
+	struct c9_inquiry *inqp;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry));
+	if (err == SCSI_DH_OK) {
+		err = RDAC_UNOWNED;
+		inqp = &h->inq.c9;
+		/*
+		 * If in AVT mode or if the path already owns the LUN,
+		 * return RDAC_OWNED;
+		 */
+		if (((inqp->avte_cvp >> 7) == 0x1) ||
+				 ((inqp->avte_cvp & 0x1) != 0))
+			err = RDAC_OWNED;
+	} else
+		err = RDAC_FAILED;
+	return err;
+}
+
+static int initialize_controller(struct scsi_device *sdev)
+{
+	int err;
+	struct c4_inquiry *inqp;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry));
+	if (err == SCSI_DH_OK) {
+		inqp = &h->inq.c4;
+		h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id);
+		if (!h->ctlr)
+			err = SCSI_DH_RES_TEMP_UNAVAIL;
+	}
+	return err;
+}
+
+static int set_mode_select(struct scsi_device *sdev)
+{
+	int err;
+	struct c2_inquiry *inqp;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+
+	err = submit_inquiry(sdev, 0xC2, sizeof(struct c2_inquiry));
+	if (err == SCSI_DH_OK) {
+		inqp = &h->inq.c2;
+		/*
+		 * If more than MODE6_MAX_LUN luns are supported, use
+		 * mode select 10
+		 */
+		if (inqp->max_lun_supported >= MODE6_MAX_LUN)
+			h->ctlr->use_ms10 = 1;
+		else
+			h->ctlr->use_ms10 = 0;
+	}
+	return err;
+}
+
+static int mode_select_handle_sense(struct scsi_device *sdev)
+{
+	struct scsi_sense_hdr sense_hdr;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	int sense, err = SCSI_DH_IO, ret;
+
+	ret = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sense_hdr);
+	if (!ret)
+		goto done;
+
+	err = SCSI_DH_OK;
+	sense = (sense_hdr.sense_key << 16) | (sense_hdr.asc << 8) |
+			sense_hdr.ascq;
+	/* If it is retryable failure, submit the c9 inquiry again */
+	if (sense == 0x59136 || sense == 0x68b02 || sense == 0xb8b02 ||
+			    sense == 0x62900) {
+		/* 0x59136    - Command lock contention
+		 * 0x[6b]8b02 - Quiesense in progress or achieved
+		 * 0x62900    - Power On, Reset, or Bus Device Reset
+		 */
+		err = SCSI_DH_RETRY;
+	}
+
+	if (sense)
+		sdev_printk(KERN_INFO, sdev,
+			"MODE_SELECT failed with sense 0x%x.\n", sense);
+done:
+	return err;
+}
+
+static int send_mode_select(struct scsi_device *sdev)
+{
+	struct request *rq;
+	struct request_queue *q = sdev->request_queue;
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	int err = SCSI_DH_RES_TEMP_UNAVAIL;
+
+	rq = rdac_failover_get(sdev);
+	if (!rq)
+		goto done;
+
+	sdev_printk(KERN_INFO, sdev, "queueing MODE_SELECT command.\n");
+
+	err = blk_execute_rq(q, NULL, rq, 1);
+	if (err != SCSI_DH_OK)
+		err = mode_select_handle_sense(sdev);
+	if (err == SCSI_DH_OK)
+		h->state = RDAC_STATE_ACTIVE;
+done:
+	return err;
+}
+
+static int rdac_activate(struct scsi_device *sdev)
+{
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	int err = SCSI_DH_OK;
+
+	if (h->lun == UNINITIALIZED_LUN) {
+		err = get_lun(sdev);
+		if (err != SCSI_DH_OK)
+			goto done;
+	}
+
+	err = check_ownership(sdev);
+	switch (err) {
+	case RDAC_UNOWNED:
+		break;
+	case RDAC_OWNED:
+		err = SCSI_DH_OK;
+		goto done;
+	case RDAC_FAILED:
+	default:
+		err = SCSI_DH_IO;
+		goto done;
+	}
+
+	if (!h->ctlr) {
+		err = initialize_controller(sdev);
+		if (err != SCSI_DH_OK)
+			goto done;
+	}
+
+	if (h->ctlr->use_ms10 == -1) {
+		err = set_mode_select(sdev);
+		if (err != SCSI_DH_OK)
+			goto done;
+	}
+
+	err = send_mode_select(sdev);
+done:
+	return err;
+}
+
+static int rdac_prep_fn(struct scsi_device *sdev, struct request *req)
+{
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	int ret = BLKPREP_OK;
+
+	if (h->state != RDAC_STATE_ACTIVE) {
+		ret = BLKPREP_KILL;
+		req->cmd_flags |= REQ_QUIET;
+	}
+	return ret;
+
+}
+
+static int rdac_check_sense(struct scsi_device *sdev,
+				struct scsi_sense_hdr *sense_hdr)
+{
+	struct rdac_dh_data *h = get_rdac_data(sdev);
+	switch (sense_hdr->sense_key) {
+	case NOT_READY:
+		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81)
+			/* LUN Not Ready - Storage firmware incompatible
+			 * Manual code synchonisation required.
+			 *
+			 * Nothing we can do here. Try to bypass the path.
+			 */
+			return SUCCESS;
+		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0xA1)
+			/* LUN Not Ready - Quiescense in progress
+			 *
+			 * Just retry and wait.
+			 */
+			return NEEDS_RETRY;
+		break;
+	case ILLEGAL_REQUEST:
+		if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) {
+			/* Invalid Request - Current Logical Unit Ownership.
+			 * Controller is not the current owner of the LUN,
+			 * Fail the path, so that the other path be used.
+			 */
+			h->state = RDAC_STATE_PASSIVE;
+			return SUCCESS;
+		}
+		break;
+	case UNIT_ATTENTION:
+		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
+			/*
+			 * Power On, Reset, or Bus Device Reset, just retry.
+			 */
+			return NEEDS_RETRY;
+		break;
+	}
+	/* success just means we do not care what scsi-ml does */
+	return SCSI_RETURN_NOT_HANDLED;
+}
+
+static const struct {
+	char *vendor;
+	char *model;
+} rdac_dev_list[] = {
+	{"IBM", "1722"},
+	{"IBM", "1724"},
+	{"IBM", "1726"},
+	{"IBM", "1742"},
+	{"IBM", "1814"},
+	{"IBM", "1815"},
+	{"IBM", "1818"},
+	{"IBM", "3526"},
+	{"SGI", "TP9400"},
+	{"SGI", "TP9500"},
+	{"SGI", "IS"},
+	{"STK", "OPENstorage D280"},
+	{"SUN", "CSM200_R"},
+	{"SUN", "LCSM100_F"},
+	{NULL, NULL},
+};
+
+static int rdac_bus_notify(struct notifier_block *, unsigned long, void *);
+
+static struct scsi_device_handler rdac_dh = {
+	.name = RDAC_NAME,
+	.module = THIS_MODULE,
+	.nb.notifier_call = rdac_bus_notify,
+	.prep_fn = rdac_prep_fn,
+	.check_sense = rdac_check_sense,
+	.activate = rdac_activate,
+};
+
+/*
+ * TODO: need some interface so we can set trespass values
+ */
+static int rdac_bus_notify(struct notifier_block *nb,
+			    unsigned long action, void *data)
+{
+	struct device *dev = data;
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct scsi_dh_data *scsi_dh_data;
+	struct rdac_dh_data *h;
+	int i, found = 0;
+	unsigned long flags;
+
+	if (action == BUS_NOTIFY_ADD_DEVICE) {
+		for (i = 0; rdac_dev_list[i].vendor; i++) {
+			if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor,
+				     strlen(rdac_dev_list[i].vendor)) &&
+			    !strncmp(sdev->model, rdac_dev_list[i].model,
+				     strlen(rdac_dev_list[i].model))) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found)
+			goto out;
+
+		scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+				+ sizeof(*h) , GFP_KERNEL);
+		if (!scsi_dh_data) {
+			sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n",
+				    RDAC_NAME);
+			goto out;
+		}
+
+		scsi_dh_data->scsi_dh = &rdac_dh;
+		h = (struct rdac_dh_data *) scsi_dh_data->buf;
+		h->lun = UNINITIALIZED_LUN;
+		h->state = RDAC_STATE_ACTIVE;
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		sdev->scsi_dh_data = scsi_dh_data;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+		try_module_get(THIS_MODULE);
+
+		sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", RDAC_NAME);
+
+	} else if (action == BUS_NOTIFY_DEL_DEVICE) {
+		if (sdev->scsi_dh_data == NULL ||
+				sdev->scsi_dh_data->scsi_dh != &rdac_dh)
+			goto out;
+
+		spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
+		scsi_dh_data = sdev->scsi_dh_data;
+		sdev->scsi_dh_data = NULL;
+		spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+
+		h = (struct rdac_dh_data *) scsi_dh_data->buf;
+		if (h->ctlr)
+			kref_put(&h->ctlr->kref, release_controller);
+		kfree(scsi_dh_data);
+		module_put(THIS_MODULE);
+		sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", RDAC_NAME);
+	}
+
+out:
+	return 0;
+}
+
+static int __init rdac_init(void)
+{
+	int r;
+
+	r = scsi_register_device_handler(&rdac_dh);
+	if (r != 0)
+		printk(KERN_ERR "Failed to register scsi device handler.");
+	return r;
+}
+
+static void __exit rdac_exit(void)
+{
+	scsi_unregister_device_handler(&rdac_dh);
+}
+
+module_init(rdac_init);
+module_exit(rdac_exit);
+
+MODULE_DESCRIPTION("Multipath LSI/Engenio RDAC driver");
+MODULE_AUTHOR("Mike Christie, Chandra Seetharaman");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c
index 59fbef08d690..62a4618530d0 100644
--- a/drivers/scsi/esp_scsi.c
+++ b/drivers/scsi/esp_scsi.c
@@ -219,19 +219,10 @@ static void esp_reset_esp(struct esp *esp)
 	/* Now reset the ESP chip */
 	scsi_esp_cmd(esp, ESP_CMD_RC);
 	scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA);
+	if (esp->rev == FAST)
+		esp_write8(ESP_CONFIG2_FENAB, ESP_CFG2);
 	scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA);
 
-	/* Reload the configuration registers */
-	esp_write8(esp->cfact, ESP_CFACT);
-
-	esp->prev_stp = 0;
-	esp_write8(esp->prev_stp, ESP_STP);
-
-	esp->prev_soff = 0;
-	esp_write8(esp->prev_soff, ESP_SOFF);
-
-	esp_write8(esp->neg_defp, ESP_TIMEO);
-
 	/* This is the only point at which it is reliable to read
 	 * the ID-code for a fast ESP chip variants.
 	 */
@@ -316,6 +307,17 @@ static void esp_reset_esp(struct esp *esp)
 		break;
 	}
 
+	/* Reload the configuration registers */
+	esp_write8(esp->cfact, ESP_CFACT);
+
+	esp->prev_stp = 0;
+	esp_write8(esp->prev_stp, ESP_STP);
+
+	esp->prev_soff = 0;
+	esp_write8(esp->prev_soff, ESP_SOFF);
+
+	esp_write8(esp->neg_defp, ESP_TIMEO);
+
 	/* Eat any bitrot in the chip */
 	esp_read8(ESP_INTRPT);
 	udelay(100);
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index c6457bfc8a49..35cd892dce04 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -290,7 +290,7 @@ static void scsi_host_dev_release(struct device *dev)
 	kfree(shost);
 }
 
-struct device_type scsi_host_type = {
+static struct device_type scsi_host_type = {
 	.name =		"scsi_host",
 	.release =	scsi_host_dev_release,
 };
diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile
index 6ac0633d5452..a423d9633625 100644
--- a/drivers/scsi/ibmvscsi/Makefile
+++ b/drivers/scsi/ibmvscsi/Makefile
@@ -5,3 +5,4 @@ ibmvscsic-$(CONFIG_PPC_ISERIES)	+= iseries_vscsi.o
 ibmvscsic-$(CONFIG_PPC_PSERIES)	+= rpa_vscsi.o 
 
 obj-$(CONFIG_SCSI_IBMVSCSIS)	+= ibmvstgt.o
+obj-$(CONFIG_SCSI_IBMVFC)	+= ibmvfc.o
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
new file mode 100644
index 000000000000..eb702b96d57c
--- /dev/null
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -0,0 +1,3910 @@
+/*
+ * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
+ *
+ * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
+ *
+ * Copyright (C) IBM Corporation, 2008
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/of.h>
+#include <linux/stringify.h>
+#include <asm/firmware.h>
+#include <asm/irq.h>
+#include <asm/vio.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_transport_fc.h>
+#include "ibmvfc.h"
+
+static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
+static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
+static unsigned int max_lun = IBMVFC_MAX_LUN;
+static unsigned int max_targets = IBMVFC_MAX_TARGETS;
+static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
+static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
+static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
+static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
+static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
+static LIST_HEAD(ibmvfc_head);
+static DEFINE_SPINLOCK(ibmvfc_driver_lock);
+static struct scsi_transport_template *ibmvfc_transport_template;
+
+MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
+MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBMVFC_DRIVER_VERSION);
+
+module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
+		 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
+module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(default_timeout,
+		 "Default timeout in seconds for initialization and EH commands. "
+		 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
+module_param_named(max_requests, max_requests, uint, S_IRUGO);
+MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
+		 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
+module_param_named(max_lun, max_lun, uint, S_IRUGO);
+MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
+		 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
+module_param_named(max_targets, max_targets, uint, S_IRUGO);
+MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
+		 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
+module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
+		 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
+module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable driver debug information. "
+		 "[Default=" __stringify(IBMVFC_DEBUG) "]");
+module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
+		 "transport should insulate the loss of a remote port. Once this "
+		 "value is exceeded, the scsi target is removed. "
+		 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
+module_param_named(log_level, log_level, uint, 0);
+MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
+		 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
+
+static const struct {
+	u16 status;
+	u16 error;
+	u8 result;
+	u8 retry;
+	int log;
+	char *name;
+} cmd_status [] = {
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" },
+	{ IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
+
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
+	{ IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
+
+	{ IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
+	{ IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
+
+	{ IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
+};
+
+static void ibmvfc_npiv_login(struct ibmvfc_host *);
+static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
+static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
+static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
+
+static const char *unknown_error = "unknown error";
+
+#ifdef CONFIG_SCSI_IBMVFC_TRACE
+/**
+ * ibmvfc_trc_start - Log a start trace entry
+ * @evt:		ibmvfc event struct
+ *
+ **/
+static void ibmvfc_trc_start(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
+	struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
+	struct ibmvfc_trace_entry *entry;
+
+	entry = &vhost->trace[vhost->trace_index++];
+	entry->evt = evt;
+	entry->time = jiffies;
+	entry->fmt = evt->crq.format;
+	entry->type = IBMVFC_TRC_START;
+
+	switch (entry->fmt) {
+	case IBMVFC_CMD_FORMAT:
+		entry->op_code = vfc_cmd->iu.cdb[0];
+		entry->scsi_id = vfc_cmd->tgt_scsi_id;
+		entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
+		entry->tmf_flags = vfc_cmd->iu.tmf_flags;
+		entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
+		break;
+	case IBMVFC_MAD_FORMAT:
+		entry->op_code = mad->opcode;
+		break;
+	default:
+		break;
+	};
+}
+
+/**
+ * ibmvfc_trc_end - Log an end trace entry
+ * @evt:		ibmvfc event struct
+ *
+ **/
+static void ibmvfc_trc_end(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
+	struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
+	struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
+
+	entry->evt = evt;
+	entry->time = jiffies;
+	entry->fmt = evt->crq.format;
+	entry->type = IBMVFC_TRC_END;
+
+	switch (entry->fmt) {
+	case IBMVFC_CMD_FORMAT:
+		entry->op_code = vfc_cmd->iu.cdb[0];
+		entry->scsi_id = vfc_cmd->tgt_scsi_id;
+		entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
+		entry->tmf_flags = vfc_cmd->iu.tmf_flags;
+		entry->u.end.status = vfc_cmd->status;
+		entry->u.end.error = vfc_cmd->error;
+		entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
+		entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
+		entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
+		break;
+	case IBMVFC_MAD_FORMAT:
+		entry->op_code = mad->opcode;
+		entry->u.end.status = mad->status;
+		break;
+	default:
+		break;
+
+	};
+}
+
+#else
+#define ibmvfc_trc_start(evt) do { } while (0)
+#define ibmvfc_trc_end(evt) do { } while (0)
+#endif
+
+/**
+ * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
+ * @status:		status / error class
+ * @error:		error
+ *
+ * Return value:
+ *	index into cmd_status / -EINVAL on failure
+ **/
+static int ibmvfc_get_err_index(u16 status, u16 error)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
+		if ((cmd_status[i].status & status) == cmd_status[i].status &&
+		    cmd_status[i].error == error)
+			return i;
+
+	return -EINVAL;
+}
+
+/**
+ * ibmvfc_get_cmd_error - Find the error description for the fcp response
+ * @status:		status / error class
+ * @error:		error
+ *
+ * Return value:
+ *	error description string
+ **/
+static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
+{
+	int rc = ibmvfc_get_err_index(status, error);
+	if (rc >= 0)
+		return cmd_status[rc].name;
+	return unknown_error;
+}
+
+/**
+ * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
+ * @vfc_cmd:	ibmvfc command struct
+ *
+ * Return value:
+ *	SCSI result value to return for completed command
+ **/
+static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
+{
+	int err;
+	struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
+	int fc_rsp_len = rsp->fcp_rsp_len;
+
+	if ((rsp->flags & FCP_RSP_LEN_VALID) &&
+	    ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
+	     rsp->data.info.rsp_code))
+		return DID_ERROR << 16;
+
+	if (!vfc_cmd->status) {
+		if (rsp->flags & FCP_RESID_OVER)
+			return rsp->scsi_status | (DID_ERROR << 16);
+		else
+			return rsp->scsi_status | (DID_OK << 16);
+	}
+
+	err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
+	if (err >= 0)
+		return rsp->scsi_status | (cmd_status[err].result << 16);
+	return rsp->scsi_status | (DID_ERROR << 16);
+}
+
+/**
+ * ibmvfc_retry_cmd - Determine if error status is retryable
+ * @status:		status / error class
+ * @error:		error
+ *
+ * Return value:
+ *	1 if error should be retried / 0 if it should not
+ **/
+static int ibmvfc_retry_cmd(u16 status, u16 error)
+{
+	int rc = ibmvfc_get_err_index(status, error);
+
+	if (rc >= 0)
+		return cmd_status[rc].retry;
+	return 1;
+}
+
+static const char *unknown_fc_explain = "unknown fc explain";
+
+static const struct {
+	u16 fc_explain;
+	char *name;
+} ls_explain [] = {
+	{ 0x00, "no additional explanation" },
+	{ 0x01, "service parameter error - options" },
+	{ 0x03, "service parameter error - initiator control" },
+	{ 0x05, "service parameter error - recipient control" },
+	{ 0x07, "service parameter error - received data field size" },
+	{ 0x09, "service parameter error - concurrent seq" },
+	{ 0x0B, "service parameter error - credit" },
+	{ 0x0D, "invalid N_Port/F_Port_Name" },
+	{ 0x0E, "invalid node/Fabric Name" },
+	{ 0x0F, "invalid common service parameters" },
+	{ 0x11, "invalid association header" },
+	{ 0x13, "association header required" },
+	{ 0x15, "invalid originator S_ID" },
+	{ 0x17, "invalid OX_ID-RX-ID combination" },
+	{ 0x19, "command (request) already in progress" },
+	{ 0x1E, "N_Port Login requested" },
+	{ 0x1F, "Invalid N_Port_ID" },
+};
+
+static const struct {
+	u16 fc_explain;
+	char *name;
+} gs_explain [] = {
+	{ 0x00, "no additional explanation" },
+	{ 0x01, "port identifier not registered" },
+	{ 0x02, "port name not registered" },
+	{ 0x03, "node name not registered" },
+	{ 0x04, "class of service not registered" },
+	{ 0x06, "initial process associator not registered" },
+	{ 0x07, "FC-4 TYPEs not registered" },
+	{ 0x08, "symbolic port name not registered" },
+	{ 0x09, "symbolic node name not registered" },
+	{ 0x0A, "port type not registered" },
+	{ 0xF0, "authorization exception" },
+	{ 0xF1, "authentication exception" },
+	{ 0xF2, "data base full" },
+	{ 0xF3, "data base empty" },
+	{ 0xF4, "processing request" },
+	{ 0xF5, "unable to verify connection" },
+	{ 0xF6, "devices not in a common zone" },
+};
+
+/**
+ * ibmvfc_get_ls_explain - Return the FC Explain description text
+ * @status:	FC Explain status
+ *
+ * Returns:
+ *	error string
+ **/
+static const char *ibmvfc_get_ls_explain(u16 status)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
+		if (ls_explain[i].fc_explain == status)
+			return ls_explain[i].name;
+
+	return unknown_fc_explain;
+}
+
+/**
+ * ibmvfc_get_gs_explain - Return the FC Explain description text
+ * @status:	FC Explain status
+ *
+ * Returns:
+ *	error string
+ **/
+static const char *ibmvfc_get_gs_explain(u16 status)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
+		if (gs_explain[i].fc_explain == status)
+			return gs_explain[i].name;
+
+	return unknown_fc_explain;
+}
+
+static const struct {
+	enum ibmvfc_fc_type fc_type;
+	char *name;
+} fc_type [] = {
+	{ IBMVFC_FABRIC_REJECT, "fabric reject" },
+	{ IBMVFC_PORT_REJECT, "port reject" },
+	{ IBMVFC_LS_REJECT, "ELS reject" },
+	{ IBMVFC_FABRIC_BUSY, "fabric busy" },
+	{ IBMVFC_PORT_BUSY, "port busy" },
+	{ IBMVFC_BASIC_REJECT, "basic reject" },
+};
+
+static const char *unknown_fc_type = "unknown fc type";
+
+/**
+ * ibmvfc_get_fc_type - Return the FC Type description text
+ * @status:	FC Type error status
+ *
+ * Returns:
+ *	error string
+ **/
+static const char *ibmvfc_get_fc_type(u16 status)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fc_type); i++)
+		if (fc_type[i].fc_type == status)
+			return fc_type[i].name;
+
+	return unknown_fc_type;
+}
+
+/**
+ * ibmvfc_set_tgt_action - Set the next init action for the target
+ * @tgt:		ibmvfc target struct
+ * @action:		action to perform
+ *
+ **/
+static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
+				  enum ibmvfc_target_action action)
+{
+	switch (tgt->action) {
+	case IBMVFC_TGT_ACTION_DEL_RPORT:
+		break;
+	default:
+		tgt->action = action;
+		break;
+	}
+}
+
+/**
+ * ibmvfc_set_host_state - Set the state for the host
+ * @vhost:		ibmvfc host struct
+ * @state:		state to set host to
+ *
+ * Returns:
+ *	0 if state changed / non-zero if not changed
+ **/
+static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
+				  enum ibmvfc_host_state state)
+{
+	int rc = 0;
+
+	switch (vhost->state) {
+	case IBMVFC_HOST_OFFLINE:
+		rc = -EINVAL;
+		break;
+	default:
+		vhost->state = state;
+		break;
+	};
+
+	return rc;
+}
+
+/**
+ * ibmvfc_set_host_action - Set the next init action for the host
+ * @vhost:		ibmvfc host struct
+ * @action:		action to perform
+ *
+ **/
+static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
+				   enum ibmvfc_host_action action)
+{
+	switch (action) {
+	case IBMVFC_HOST_ACTION_ALLOC_TGTS:
+		if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
+			vhost->action = action;
+		break;
+	case IBMVFC_HOST_ACTION_INIT_WAIT:
+		if (vhost->action == IBMVFC_HOST_ACTION_INIT)
+			vhost->action = action;
+		break;
+	case IBMVFC_HOST_ACTION_QUERY:
+		switch (vhost->action) {
+		case IBMVFC_HOST_ACTION_INIT_WAIT:
+		case IBMVFC_HOST_ACTION_NONE:
+		case IBMVFC_HOST_ACTION_TGT_ADD:
+			vhost->action = action;
+			break;
+		default:
+			break;
+		};
+		break;
+	case IBMVFC_HOST_ACTION_TGT_INIT:
+		if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
+			vhost->action = action;
+		break;
+	case IBMVFC_HOST_ACTION_INIT:
+	case IBMVFC_HOST_ACTION_TGT_DEL:
+	case IBMVFC_HOST_ACTION_QUERY_TGTS:
+	case IBMVFC_HOST_ACTION_TGT_ADD:
+	case IBMVFC_HOST_ACTION_NONE:
+	default:
+		vhost->action = action;
+		break;
+	};
+}
+
+/**
+ * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
+ * @vhost:		ibmvfc host struct
+ *
+ * Return value:
+ *	nothing
+ **/
+static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
+{
+	if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
+		scsi_block_requests(vhost->host);
+		ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING);
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
+	} else
+		vhost->reinit = 1;
+
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_link_down - Handle a link down event from the adapter
+ * @vhost:	ibmvfc host struct
+ * @state:	ibmvfc host state to enter
+ *
+ **/
+static void ibmvfc_link_down(struct ibmvfc_host *vhost,
+			     enum ibmvfc_host_state state)
+{
+	struct ibmvfc_target *tgt;
+
+	ENTER;
+	scsi_block_requests(vhost->host);
+	list_for_each_entry(tgt, &vhost->targets, queue)
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
+	ibmvfc_set_host_state(vhost, state);
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
+	vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
+	wake_up(&vhost->work_wait_q);
+	LEAVE;
+}
+
+/**
+ * ibmvfc_init_host - Start host initialization
+ * @vhost:		ibmvfc host struct
+ *
+ * Return value:
+ *	nothing
+ **/
+static void ibmvfc_init_host(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_target *tgt;
+
+	if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
+		if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
+			dev_err(vhost->dev,
+				"Host initialization retries exceeded. Taking adapter offline\n");
+			ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
+			return;
+		}
+	}
+
+	if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
+		list_for_each_entry(tgt, &vhost->targets, queue)
+			tgt->need_login = 1;
+		scsi_block_requests(vhost->host);
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
+		vhost->job_step = ibmvfc_npiv_login;
+		wake_up(&vhost->work_wait_q);
+	}
+}
+
+/**
+ * ibmvfc_send_crq - Send a CRQ
+ * @vhost:	ibmvfc host struct
+ * @word1:	the first 64 bits of the data
+ * @word2:	the second 64 bits of the data
+ *
+ * Return value:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
+{
+	struct vio_dev *vdev = to_vio_dev(vhost->dev);
+	return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
+}
+
+/**
+ * ibmvfc_send_crq_init - Send a CRQ init message
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
+{
+	ibmvfc_dbg(vhost, "Sending CRQ init\n");
+	return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
+}
+
+/**
+ * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
+{
+	ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
+	return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
+}
+
+/**
+ * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
+ * @vhost:	ibmvfc host struct
+ *
+ * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
+ * the crq with the hypervisor.
+ **/
+static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
+{
+	long rc;
+	struct vio_dev *vdev = to_vio_dev(vhost->dev);
+	struct ibmvfc_crq_queue *crq = &vhost->crq;
+
+	ibmvfc_dbg(vhost, "Releasing CRQ\n");
+	free_irq(vdev->irq, vhost);
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	vhost->state = IBMVFC_NO_CRQ;
+	dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
+	free_page((unsigned long)crq->msgs);
+}
+
+/**
+ * ibmvfc_reenable_crq_queue - reenables the CRQ
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
+{
+	int rc;
+	struct vio_dev *vdev = to_vio_dev(vhost->dev);
+
+	/* Re-enable the CRQ */
+	do {
+		rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
+	} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	if (rc)
+		dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
+
+	return rc;
+}
+
+/**
+ * ibmvfc_reset_crq - resets a crq after a failure
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
+{
+	int rc;
+	struct vio_dev *vdev = to_vio_dev(vhost->dev);
+	struct ibmvfc_crq_queue *crq = &vhost->crq;
+
+	/* Close the CRQ */
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	vhost->state = IBMVFC_NO_CRQ;
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
+
+	/* Clean out the queue */
+	memset(crq->msgs, 0, PAGE_SIZE);
+	crq->cur = 0;
+
+	/* And re-open it again */
+	rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+				crq->msg_token, PAGE_SIZE);
+
+	if (rc == H_CLOSED)
+		/* Adapter is good, but other end is not ready */
+		dev_warn(vhost->dev, "Partner adapter not ready\n");
+	else if (rc != 0)
+		dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
+
+	return rc;
+}
+
+/**
+ * ibmvfc_valid_event - Determines if event is valid.
+ * @pool:	event_pool that contains the event
+ * @evt:	ibmvfc event to be checked for validity
+ *
+ * Return value:
+ *	1 if event is valid / 0 if event is not valid
+ **/
+static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
+			      struct ibmvfc_event *evt)
+{
+	int index = evt - pool->events;
+	if (index < 0 || index >= pool->size)	/* outside of bounds */
+		return 0;
+	if (evt != pool->events + index)	/* unaligned */
+		return 0;
+	return 1;
+}
+
+/**
+ * ibmvfc_free_event - Free the specified event
+ * @evt:	ibmvfc_event to be freed
+ *
+ **/
+static void ibmvfc_free_event(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_event_pool *pool = &vhost->pool;
+
+	BUG_ON(!ibmvfc_valid_event(pool, evt));
+	BUG_ON(atomic_inc_return(&evt->free) != 1);
+	list_add_tail(&evt->queue, &vhost->free);
+}
+
+/**
+ * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
+ * @evt:	ibmvfc event struct
+ *
+ * This function does not setup any error status, that must be done
+ * before this function gets called.
+ **/
+static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
+{
+	struct scsi_cmnd *cmnd = evt->cmnd;
+
+	if (cmnd) {
+		scsi_dma_unmap(cmnd);
+		cmnd->scsi_done(cmnd);
+	}
+
+	ibmvfc_free_event(evt);
+}
+
+/**
+ * ibmvfc_fail_request - Fail request with specified error code
+ * @evt:		ibmvfc event struct
+ * @error_code:	error code to fail request with
+ *
+ * Return value:
+ *	none
+ **/
+static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
+{
+	if (evt->cmnd) {
+		evt->cmnd->result = (error_code << 16);
+		evt->done = ibmvfc_scsi_eh_done;
+	} else
+		evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
+
+	list_del(&evt->queue);
+	del_timer(&evt->timer);
+	ibmvfc_trc_end(evt);
+	evt->done(evt);
+}
+
+/**
+ * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
+ * @vhost:		ibmvfc host struct
+ * @error_code:	error code to fail requests with
+ *
+ * Return value:
+ *	none
+ **/
+static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
+{
+	struct ibmvfc_event *evt, *pos;
+
+	ibmvfc_dbg(vhost, "Purging all requests\n");
+	list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
+		ibmvfc_fail_request(evt, error_code);
+}
+
+/**
+ * __ibmvfc_reset_host - Reset the connection to the server (no locking)
+ * @vhost:	struct ibmvfc host to reset
+ **/
+static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
+{
+	int rc;
+
+	scsi_block_requests(vhost->host);
+	ibmvfc_purge_requests(vhost, DID_ERROR);
+	if ((rc = ibmvfc_reset_crq(vhost)) ||
+	    (rc = ibmvfc_send_crq_init(vhost)) ||
+	    (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
+		dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+	} else
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+}
+
+/**
+ * ibmvfc_reset_host - Reset the connection to the server
+ * @vhost:	struct ibmvfc host to reset
+ **/
+static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	__ibmvfc_reset_host(vhost);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+}
+
+/**
+ * ibmvfc_retry_host_init - Retry host initialization if allowed
+ * @vhost:	ibmvfc host struct
+ *
+ **/
+static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
+{
+	if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
+		if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
+			dev_err(vhost->dev,
+				"Host initialization retries exceeded. Taking adapter offline\n");
+			ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
+		} else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES)
+			__ibmvfc_reset_host(vhost);
+		else
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
+	}
+
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * __ibmvfc_find_target - Find the specified scsi_target (no locking)
+ * @starget:	scsi target struct
+ *
+ * Return value:
+ *	ibmvfc_target struct / NULL if not found
+ **/
+static struct ibmvfc_target *__ibmvfc_find_target(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	struct ibmvfc_target *tgt;
+
+	list_for_each_entry(tgt, &vhost->targets, queue)
+		if (tgt->target_id == starget->id)
+			return tgt;
+	return NULL;
+}
+
+/**
+ * ibmvfc_find_target - Find the specified scsi_target
+ * @starget:	scsi target struct
+ *
+ * Return value:
+ *	ibmvfc_target struct / NULL if not found
+ **/
+static struct ibmvfc_target *ibmvfc_find_target(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ibmvfc_target *tgt;
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	tgt = __ibmvfc_find_target(starget);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return tgt;
+}
+
+/**
+ * ibmvfc_get_host_speed - Get host port speed
+ * @shost:		scsi host struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
+{
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (vhost->state == IBMVFC_ACTIVE) {
+		switch (vhost->login_buf->resp.link_speed / 100) {
+		case 1:
+			fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
+			break;
+		case 2:
+			fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
+			break;
+		case 4:
+			fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
+			break;
+		case 8:
+			fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
+			break;
+		case 10:
+			fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
+			break;
+		case 16:
+			fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
+			break;
+		default:
+			ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n",
+				   vhost->login_buf->resp.link_speed / 100);
+			fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
+			break;
+		}
+	} else
+		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/**
+ * ibmvfc_get_host_port_state - Get host port state
+ * @shost:		scsi host struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
+{
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	switch (vhost->state) {
+	case IBMVFC_INITIALIZING:
+	case IBMVFC_ACTIVE:
+		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+		break;
+	case IBMVFC_LINK_DOWN:
+		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
+		break;
+	case IBMVFC_LINK_DEAD:
+	case IBMVFC_HOST_OFFLINE:
+		fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
+		break;
+	case IBMVFC_HALTED:
+		fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
+		break;
+	default:
+		ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
+		fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
+		break;
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/**
+ * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
+ * @rport:		rport struct
+ * @timeout:	timeout value
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
+{
+	if (timeout)
+		rport->dev_loss_tmo = timeout;
+	else
+		rport->dev_loss_tmo = 1;
+}
+
+/**
+ * ibmvfc_get_starget_node_name - Get SCSI target's node name
+ * @starget:	scsi target struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
+{
+	struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+	fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
+}
+
+/**
+ * ibmvfc_get_starget_port_name - Get SCSI target's port name
+ * @starget:	scsi target struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
+{
+	struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+	fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
+}
+
+/**
+ * ibmvfc_get_starget_port_id - Get SCSI target's port ID
+ * @starget:	scsi target struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
+{
+	struct ibmvfc_target *tgt = ibmvfc_find_target(starget);
+	fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
+}
+
+/**
+ * ibmvfc_wait_while_resetting - Wait while the host resets
+ * @vhost:		ibmvfc host struct
+ *
+ * Return value:
+ * 	0 on success / other on failure
+ **/
+static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
+{
+	long timeout = wait_event_timeout(vhost->init_wait_q,
+					  (vhost->state == IBMVFC_ACTIVE ||
+					   vhost->state == IBMVFC_HOST_OFFLINE ||
+					   vhost->state == IBMVFC_LINK_DEAD),
+					  (init_timeout * HZ));
+
+	return timeout ? 0 : -EIO;
+}
+
+/**
+ * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
+ * @shost:		scsi host struct
+ *
+ * Return value:
+ * 	0 on success / other on failure
+ **/
+static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
+{
+	struct ibmvfc_host *vhost = shost_priv(shost);
+
+	dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
+	ibmvfc_reset_host(vhost);
+	return ibmvfc_wait_while_resetting(vhost);
+}
+
+/**
+ * ibmvfc_gather_partition_info - Gather info about the LPAR
+ *
+ * Return value:
+ *	none
+ **/
+static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
+{
+	struct device_node *rootdn;
+	const char *name;
+	const unsigned int *num;
+
+	rootdn = of_find_node_by_path("/");
+	if (!rootdn)
+		return;
+
+	name = of_get_property(rootdn, "ibm,partition-name", NULL);
+	if (name)
+		strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
+	num = of_get_property(rootdn, "ibm,partition-no", NULL);
+	if (num)
+		vhost->partition_number = *num;
+	of_node_put(rootdn);
+}
+
+/**
+ * ibmvfc_set_login_info - Setup info for NPIV login
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ *	none
+ **/
+static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_npiv_login *login_info = &vhost->login_info;
+	struct device_node *of_node = vhost->dev->archdata.of_node;
+	const char *location;
+
+	memset(login_info, 0, sizeof(*login_info));
+
+	login_info->ostype = IBMVFC_OS_LINUX;
+	login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
+	login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
+	login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
+	login_info->partition_num = vhost->partition_number;
+	login_info->vfc_frame_version = 1;
+	login_info->fcp_version = 3;
+	if (vhost->client_migrated)
+		login_info->flags = IBMVFC_CLIENT_MIGRATED;
+
+	login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
+	login_info->capabilities = IBMVFC_CAN_MIGRATE;
+	login_info->async.va = vhost->async_crq.msg_token;
+	login_info->async.len = vhost->async_crq.size;
+	strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
+	strncpy(login_info->device_name,
+		vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
+
+	location = of_get_property(of_node, "ibm,loc-code", NULL);
+	location = location ? location : vhost->dev->bus_id;
+	strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
+}
+
+/**
+ * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
+ * @vhost:	ibmvfc host who owns the event pool
+ *
+ * Returns zero on success.
+ **/
+static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
+{
+	int i;
+	struct ibmvfc_event_pool *pool = &vhost->pool;
+
+	ENTER;
+	pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
+	pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
+	if (!pool->events)
+		return -ENOMEM;
+
+	pool->iu_storage = dma_alloc_coherent(vhost->dev,
+					      pool->size * sizeof(*pool->iu_storage),
+					      &pool->iu_token, 0);
+
+	if (!pool->iu_storage) {
+		kfree(pool->events);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < pool->size; ++i) {
+		struct ibmvfc_event *evt = &pool->events[i];
+		atomic_set(&evt->free, 1);
+		evt->crq.valid = 0x80;
+		evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
+		evt->xfer_iu = pool->iu_storage + i;
+		evt->vhost = vhost;
+		evt->ext_list = NULL;
+		list_add_tail(&evt->queue, &vhost->free);
+	}
+
+	LEAVE;
+	return 0;
+}
+
+/**
+ * ibmvfc_free_event_pool - Frees memory of the event pool of a host
+ * @vhost:	ibmvfc host who owns the event pool
+ *
+ **/
+static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
+{
+	int i;
+	struct ibmvfc_event_pool *pool = &vhost->pool;
+
+	ENTER;
+	for (i = 0; i < pool->size; ++i) {
+		list_del(&pool->events[i].queue);
+		BUG_ON(atomic_read(&pool->events[i].free) != 1);
+		if (pool->events[i].ext_list)
+			dma_pool_free(vhost->sg_pool,
+				      pool->events[i].ext_list,
+				      pool->events[i].ext_list_token);
+	}
+
+	kfree(pool->events);
+	dma_free_coherent(vhost->dev,
+			  pool->size * sizeof(*pool->iu_storage),
+			  pool->iu_storage, pool->iu_token);
+	LEAVE;
+}
+
+/**
+ * ibmvfc_get_event - Gets the next free event in pool
+ * @vhost:	ibmvfc host struct
+ *
+ * Returns a free event from the pool.
+ **/
+static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_event *evt;
+
+	BUG_ON(list_empty(&vhost->free));
+	evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
+	atomic_set(&evt->free, 0);
+	list_del(&evt->queue);
+	return evt;
+}
+
+/**
+ * ibmvfc_init_event - Initialize fields in an event struct that are always
+ *				required.
+ * @evt:	The event
+ * @done:	Routine to call when the event is responded to
+ * @format:	SRP or MAD format
+ **/
+static void ibmvfc_init_event(struct ibmvfc_event *evt,
+			      void (*done) (struct ibmvfc_event *), u8 format)
+{
+	evt->cmnd = NULL;
+	evt->sync_iu = NULL;
+	evt->crq.format = format;
+	evt->done = done;
+}
+
+/**
+ * ibmvfc_map_sg_list - Initialize scatterlist
+ * @scmd:	scsi command struct
+ * @nseg:	number of scatterlist segments
+ * @md:	memory descriptor list to initialize
+ **/
+static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
+			       struct srp_direct_buf *md)
+{
+	int i;
+	struct scatterlist *sg;
+
+	scsi_for_each_sg(scmd, sg, nseg, i) {
+		md[i].va = sg_dma_address(sg);
+		md[i].len = sg_dma_len(sg);
+		md[i].key = 0;
+	}
+}
+
+/**
+ * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
+ * @scmd:		Scsi_Cmnd with the scatterlist
+ * @evt:		ibmvfc event struct
+ * @vfc_cmd:	vfc_cmd that contains the memory descriptor
+ * @dev:		device for which to map dma memory
+ *
+ * Returns:
+ *	0 on success / non-zero on failure
+ **/
+static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
+			      struct ibmvfc_event *evt,
+			      struct ibmvfc_cmd *vfc_cmd, struct device *dev)
+{
+
+	int sg_mapped;
+	struct srp_direct_buf *data = &vfc_cmd->ioba;
+	struct ibmvfc_host *vhost = dev_get_drvdata(dev);
+
+	sg_mapped = scsi_dma_map(scmd);
+	if (!sg_mapped) {
+		vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
+		return 0;
+	} else if (unlikely(sg_mapped < 0)) {
+		if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
+			scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
+		return sg_mapped;
+	}
+
+	if (scmd->sc_data_direction == DMA_TO_DEVICE) {
+		vfc_cmd->flags |= IBMVFC_WRITE;
+		vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
+	} else {
+		vfc_cmd->flags |= IBMVFC_READ;
+		vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
+	}
+
+	if (sg_mapped == 1) {
+		ibmvfc_map_sg_list(scmd, sg_mapped, data);
+		return 0;
+	}
+
+	vfc_cmd->flags |= IBMVFC_SCATTERLIST;
+
+	if (!evt->ext_list) {
+		evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
+					       &evt->ext_list_token);
+
+		if (!evt->ext_list) {
+			scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
+			return -ENOMEM;
+		}
+	}
+
+	ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
+
+	data->va = evt->ext_list_token;
+	data->len = sg_mapped * sizeof(struct srp_direct_buf);
+	data->key = 0;
+	return 0;
+}
+
+/**
+ * ibmvfc_timeout - Internal command timeout handler
+ * @evt:	struct ibmvfc_event that timed out
+ *
+ * Called when an internally generated command times out
+ **/
+static void ibmvfc_timeout(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
+	ibmvfc_reset_host(vhost);
+}
+
+/**
+ * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
+ * @evt:		event to be sent
+ * @vhost:		ibmvfc host struct
+ * @timeout:	timeout in seconds - 0 means do not time command
+ *
+ * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
+ **/
+static int ibmvfc_send_event(struct ibmvfc_event *evt,
+			     struct ibmvfc_host *vhost, unsigned long timeout)
+{
+	u64 *crq_as_u64 = (u64 *) &evt->crq;
+	int rc;
+
+	/* Copy the IU into the transfer area */
+	*evt->xfer_iu = evt->iu;
+	if (evt->crq.format == IBMVFC_CMD_FORMAT)
+		evt->xfer_iu->cmd.tag = (u64)evt;
+	else if (evt->crq.format == IBMVFC_MAD_FORMAT)
+		evt->xfer_iu->mad_common.tag = (u64)evt;
+	else
+		BUG();
+
+	list_add_tail(&evt->queue, &vhost->sent);
+	init_timer(&evt->timer);
+
+	if (timeout) {
+		evt->timer.data = (unsigned long) evt;
+		evt->timer.expires = jiffies + (timeout * HZ);
+		evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
+		add_timer(&evt->timer);
+	}
+
+	if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
+		list_del(&evt->queue);
+		del_timer(&evt->timer);
+
+		/* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
+		 * Firmware will send a CRQ with a transport event (0xFF) to
+		 * tell this client what has happened to the transport. This
+		 * will be handled in ibmvfc_handle_crq()
+		 */
+		if (rc == H_CLOSED) {
+			if (printk_ratelimit())
+				dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
+			if (evt->cmnd)
+				scsi_dma_unmap(evt->cmnd);
+			ibmvfc_free_event(evt);
+			return SCSI_MLQUEUE_HOST_BUSY;
+		}
+
+		dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
+		if (evt->cmnd) {
+			evt->cmnd->result = DID_ERROR << 16;
+			evt->done = ibmvfc_scsi_eh_done;
+		} else
+			evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
+
+		evt->done(evt);
+	} else
+		ibmvfc_trc_start(evt);
+
+	return 0;
+}
+
+/**
+ * ibmvfc_log_error - Log an error for the failed command if appropriate
+ * @evt:	ibmvfc event to log
+ *
+ **/
+static void ibmvfc_log_error(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
+	struct scsi_cmnd *cmnd = evt->cmnd;
+	const char *err = unknown_error;
+	int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
+	int logerr = 0;
+	int rsp_code = 0;
+
+	if (index >= 0) {
+		logerr = cmd_status[index].log;
+		err = cmd_status[index].name;
+	}
+
+	if (!logerr && (vhost->log_level <= IBMVFC_DEFAULT_LOG_LEVEL))
+		return;
+
+	if (rsp->flags & FCP_RSP_LEN_VALID)
+		rsp_code = rsp->data.info.rsp_code;
+
+	scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
+		    "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
+		    cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
+		    rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
+}
+
+/**
+ * ibmvfc_scsi_done - Handle responses from commands
+ * @evt:	ibmvfc event to be handled
+ *
+ * Used as a callback when sending scsi cmds.
+ **/
+static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
+	struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
+	struct scsi_cmnd *cmnd = evt->cmnd;
+	int rsp_len = 0;
+	int sense_len = rsp->fcp_sense_len;
+
+	if (cmnd) {
+		if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
+			scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
+		else if (rsp->flags & FCP_RESID_UNDER)
+			scsi_set_resid(cmnd, rsp->fcp_resid);
+		else
+			scsi_set_resid(cmnd, 0);
+
+		if (vfc_cmd->status) {
+			cmnd->result = ibmvfc_get_err_result(vfc_cmd);
+
+			if (rsp->flags & FCP_RSP_LEN_VALID)
+				rsp_len = rsp->fcp_rsp_len;
+			if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
+				sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
+			if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len)
+				memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
+
+			ibmvfc_log_error(evt);
+		}
+
+		if (!cmnd->result &&
+		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
+			cmnd->result = (DID_ERROR << 16);
+
+		scsi_dma_unmap(cmnd);
+		cmnd->scsi_done(cmnd);
+	}
+
+	ibmvfc_free_event(evt);
+}
+
+/**
+ * ibmvfc_host_chkready - Check if the host can accept commands
+ * @vhost:	 struct ibmvfc host
+ *
+ * Returns:
+ *	1 if host can accept command / 0 if not
+ **/
+static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
+{
+	int result = 0;
+
+	switch (vhost->state) {
+	case IBMVFC_LINK_DEAD:
+	case IBMVFC_HOST_OFFLINE:
+		result = DID_NO_CONNECT << 16;
+		break;
+	case IBMVFC_NO_CRQ:
+	case IBMVFC_INITIALIZING:
+	case IBMVFC_HALTED:
+	case IBMVFC_LINK_DOWN:
+		result = DID_REQUEUE << 16;
+		break;
+	case IBMVFC_ACTIVE:
+		result = 0;
+		break;
+	};
+
+	return result;
+}
+
+/**
+ * ibmvfc_queuecommand - The queuecommand function of the scsi template
+ * @cmnd:	struct scsi_cmnd to be executed
+ * @done:	Callback function to be called when cmnd is completed
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
+			       void (*done) (struct scsi_cmnd *))
+{
+	struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
+	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
+	struct ibmvfc_cmd *vfc_cmd;
+	struct ibmvfc_event *evt;
+	u8 tag[2];
+	int rc;
+
+	if (unlikely((rc = fc_remote_port_chkready(rport))) ||
+	    unlikely((rc = ibmvfc_host_chkready(vhost)))) {
+		cmnd->result = rc;
+		done(cmnd);
+		return 0;
+	}
+
+	cmnd->result = (DID_OK << 16);
+	evt = ibmvfc_get_event(vhost);
+	ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
+	evt->cmnd = cmnd;
+	cmnd->scsi_done = done;
+	vfc_cmd = &evt->iu.cmd;
+	memset(vfc_cmd, 0, sizeof(*vfc_cmd));
+	vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
+	vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
+	vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
+	vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
+	vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
+	vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
+	vfc_cmd->tgt_scsi_id = rport->port_id;
+	if ((rport->supported_classes & FC_COS_CLASS3) &&
+	    (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3))
+		vfc_cmd->flags = IBMVFC_CLASS_3_ERR;
+	vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
+	int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
+	memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
+
+	if (scsi_populate_tag_msg(cmnd, tag)) {
+		vfc_cmd->task_tag = tag[1];
+		switch (tag[0]) {
+		case MSG_SIMPLE_TAG:
+			vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
+			break;
+		case MSG_HEAD_TAG:
+			vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
+			break;
+		case MSG_ORDERED_TAG:
+			vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
+			break;
+		};
+	}
+
+	if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
+		return ibmvfc_send_event(evt, vhost, 0);
+
+	ibmvfc_free_event(evt);
+	if (rc == -ENOMEM)
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
+		scmd_printk(KERN_ERR, cmnd,
+			    "Failed to map DMA buffer for command. rc=%d\n", rc);
+
+	cmnd->result = DID_ERROR << 16;
+	done(cmnd);
+	return 0;
+}
+
+/**
+ * ibmvfc_sync_completion - Signal that a synchronous command has completed
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
+{
+	/* copy the response back */
+	if (evt->sync_iu)
+		*evt->sync_iu = *evt->xfer_iu;
+
+	complete(&evt->comp);
+}
+
+/**
+ * ibmvfc_reset_device - Reset the device with the specified reset type
+ * @sdev:	scsi device to reset
+ * @type:	reset type
+ * @desc:	reset type description for log messages
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
+{
+	struct ibmvfc_host *vhost = shost_priv(sdev->host);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+	struct ibmvfc_cmd *tmf;
+	struct ibmvfc_event *evt;
+	union ibmvfc_iu rsp_iu;
+	struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
+	int rsp_rc = -EBUSY;
+	unsigned long flags;
+	int rsp_code = 0;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	if (vhost->state == IBMVFC_ACTIVE) {
+		evt = ibmvfc_get_event(vhost);
+		ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
+
+		tmf = &evt->iu.cmd;
+		memset(tmf, 0, sizeof(*tmf));
+		tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
+		tmf->resp.len = sizeof(tmf->rsp);
+		tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
+		tmf->payload_len = sizeof(tmf->iu);
+		tmf->resp_len = sizeof(tmf->rsp);
+		tmf->cancel_key = (unsigned long)sdev->hostdata;
+		tmf->tgt_scsi_id = rport->port_id;
+		int_to_scsilun(sdev->lun, &tmf->iu.lun);
+		tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
+		tmf->iu.tmf_flags = type;
+		evt->sync_iu = &rsp_iu;
+
+		init_completion(&evt->comp);
+		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
+	}
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	if (rsp_rc != 0) {
+		sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
+			    desc, rsp_rc);
+		return -EIO;
+	}
+
+	sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
+	wait_for_completion(&evt->comp);
+
+	if (rsp_iu.cmd.status) {
+		if (fc_rsp->flags & FCP_RSP_LEN_VALID)
+			rsp_code = fc_rsp->data.info.rsp_code;
+
+		sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
+			    "flags: %x fcp_rsp: %x, scsi_status: %x\n",
+			    desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
+			    rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
+			    fc_rsp->scsi_status);
+		rsp_rc = -EIO;
+	} else
+		sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	ibmvfc_free_event(evt);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return rsp_rc;
+}
+
+/**
+ * ibmvfc_abort_task_set - Abort outstanding commands to the device
+ * @sdev:	scsi device to abort commands
+ *
+ * This sends an Abort Task Set to the VIOS for the specified device. This does
+ * NOT send any cancel to the VIOS. That must be done separately.
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_abort_task_set(struct scsi_device *sdev)
+{
+	struct ibmvfc_host *vhost = shost_priv(sdev->host);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+	struct ibmvfc_cmd *tmf;
+	struct ibmvfc_event *evt, *found_evt;
+	union ibmvfc_iu rsp_iu;
+	struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
+	int rsp_rc = -EBUSY;
+	unsigned long flags;
+	int rsp_code = 0;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	found_evt = NULL;
+	list_for_each_entry(evt, &vhost->sent, queue) {
+		if (evt->cmnd && evt->cmnd->device == sdev) {
+			found_evt = evt;
+			break;
+		}
+	}
+
+	if (!found_evt) {
+		if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
+			sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		return 0;
+	}
+
+	if (vhost->state == IBMVFC_ACTIVE) {
+		evt = ibmvfc_get_event(vhost);
+		ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
+
+		tmf = &evt->iu.cmd;
+		memset(tmf, 0, sizeof(*tmf));
+		tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
+		tmf->resp.len = sizeof(tmf->rsp);
+		tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
+		tmf->payload_len = sizeof(tmf->iu);
+		tmf->resp_len = sizeof(tmf->rsp);
+		tmf->cancel_key = (unsigned long)sdev->hostdata;
+		tmf->tgt_scsi_id = rport->port_id;
+		int_to_scsilun(sdev->lun, &tmf->iu.lun);
+		tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
+		tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
+		evt->sync_iu = &rsp_iu;
+
+		init_completion(&evt->comp);
+		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
+	}
+
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	if (rsp_rc != 0) {
+		sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
+		return -EIO;
+	}
+
+	sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
+	wait_for_completion(&evt->comp);
+
+	if (rsp_iu.cmd.status) {
+		if (fc_rsp->flags & FCP_RSP_LEN_VALID)
+			rsp_code = fc_rsp->data.info.rsp_code;
+
+		sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
+			    "flags: %x fcp_rsp: %x, scsi_status: %x\n",
+			    ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
+			    rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
+			    fc_rsp->scsi_status);
+		rsp_rc = -EIO;
+	} else
+		sdev_printk(KERN_INFO, sdev, "Abort successful\n");
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	ibmvfc_free_event(evt);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return rsp_rc;
+}
+
+/**
+ * ibmvfc_cancel_all - Cancel all outstanding commands to the device
+ * @sdev:	scsi device to cancel commands
+ * @type:	type of error recovery being performed
+ *
+ * This sends a cancel to the VIOS for the specified device. This does
+ * NOT send any abort to the actual device. That must be done separately.
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
+{
+	struct ibmvfc_host *vhost = shost_priv(sdev->host);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+	struct ibmvfc_tmf *tmf;
+	struct ibmvfc_event *evt, *found_evt;
+	union ibmvfc_iu rsp;
+	int rsp_rc = -EBUSY;
+	unsigned long flags;
+	u16 status;
+
+	ENTER;
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	found_evt = NULL;
+	list_for_each_entry(evt, &vhost->sent, queue) {
+		if (evt->cmnd && evt->cmnd->device == sdev) {
+			found_evt = evt;
+			break;
+		}
+	}
+
+	if (!found_evt) {
+		if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
+			sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		return 0;
+	}
+
+	if (vhost->state == IBMVFC_ACTIVE) {
+		evt = ibmvfc_get_event(vhost);
+		ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
+
+		tmf = &evt->iu.tmf;
+		memset(tmf, 0, sizeof(*tmf));
+		tmf->common.version = 1;
+		tmf->common.opcode = IBMVFC_TMF_MAD;
+		tmf->common.length = sizeof(*tmf);
+		tmf->scsi_id = rport->port_id;
+		int_to_scsilun(sdev->lun, &tmf->lun);
+		tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
+		tmf->cancel_key = (unsigned long)sdev->hostdata;
+		tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata);
+
+		evt->sync_iu = &rsp;
+		init_completion(&evt->comp);
+		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
+	}
+
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	if (rsp_rc != 0) {
+		sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
+		return -EIO;
+	}
+
+	sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
+
+	wait_for_completion(&evt->comp);
+	status = rsp.mad_common.status;
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	ibmvfc_free_event(evt);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	if (status != IBMVFC_MAD_SUCCESS) {
+		sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
+		return -EIO;
+	}
+
+	sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
+	return 0;
+}
+
+/**
+ * ibmvfc_eh_abort_handler - Abort a command
+ * @cmd:	scsi command to abort
+ *
+ * Returns:
+ *	SUCCESS / FAILED
+ **/
+static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
+{
+	struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
+	struct ibmvfc_event *evt, *pos;
+	int cancel_rc, abort_rc;
+	unsigned long flags;
+
+	ENTER;
+	ibmvfc_wait_while_resetting(vhost);
+	cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET);
+	abort_rc = ibmvfc_abort_task_set(cmd->device);
+
+	if (!cancel_rc && !abort_rc) {
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
+			if (evt->cmnd && evt->cmnd->device == cmd->device)
+				ibmvfc_fail_request(evt, DID_ABORT);
+		}
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		LEAVE;
+		return SUCCESS;
+	}
+
+	LEAVE;
+	return FAILED;
+}
+
+/**
+ * ibmvfc_eh_device_reset_handler - Reset a single LUN
+ * @cmd:	scsi command struct
+ *
+ * Returns:
+ *	SUCCESS / FAILED
+ **/
+static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
+{
+	struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
+	struct ibmvfc_event *evt, *pos;
+	int cancel_rc, reset_rc;
+	unsigned long flags;
+
+	ENTER;
+	ibmvfc_wait_while_resetting(vhost);
+	cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET);
+	reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN");
+
+	if (!cancel_rc && !reset_rc) {
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
+			if (evt->cmnd && evt->cmnd->device == cmd->device)
+				ibmvfc_fail_request(evt, DID_ABORT);
+		}
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		LEAVE;
+		return SUCCESS;
+	}
+
+	LEAVE;
+	return FAILED;
+}
+
+/**
+ * ibmvfc_dev_cancel_all - Device iterated cancel all function
+ * @sdev:	scsi device struct
+ * @data:	return code
+ *
+ **/
+static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
+{
+	unsigned long *rc = data;
+	*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
+}
+
+/**
+ * ibmvfc_dev_abort_all - Device iterated abort task set function
+ * @sdev:	scsi device struct
+ * @data:	return code
+ *
+ **/
+static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
+{
+	unsigned long *rc = data;
+	*rc |= ibmvfc_abort_task_set(sdev);
+}
+
+/**
+ * ibmvfc_eh_target_reset_handler - Reset the target
+ * @cmd:	scsi command struct
+ *
+ * Returns:
+ *	SUCCESS / FAILED
+ **/
+static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
+{
+	struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
+	struct scsi_target *starget = scsi_target(cmd->device);
+	struct ibmvfc_event *evt, *pos;
+	int reset_rc;
+	unsigned long cancel_rc = 0;
+	unsigned long flags;
+
+	ENTER;
+	ibmvfc_wait_while_resetting(vhost);
+	starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
+	reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target");
+
+	if (!cancel_rc && !reset_rc) {
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
+			if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
+				ibmvfc_fail_request(evt, DID_ABORT);
+		}
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		LEAVE;
+		return SUCCESS;
+	}
+
+	LEAVE;
+	return FAILED;
+}
+
+/**
+ * ibmvfc_eh_host_reset_handler - Reset the connection to the server
+ * @cmd:	struct scsi_cmnd having problems
+ *
+ **/
+static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
+{
+	int rc;
+	struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
+
+	dev_err(vhost->dev, "Resetting connection due to error recovery\n");
+	rc = ibmvfc_issue_fc_host_lip(vhost->host);
+	return rc ? FAILED : SUCCESS;
+}
+
+/**
+ * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
+ * @rport:		rport struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
+{
+	struct scsi_target *starget = to_scsi_target(&rport->dev);
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	struct ibmvfc_event *evt, *pos;
+	unsigned long cancel_rc = 0;
+	unsigned long abort_rc = 0;
+	unsigned long flags;
+
+	ENTER;
+	starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
+	starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
+
+	if (!cancel_rc && !abort_rc) {
+		spin_lock_irqsave(shost->host_lock, flags);
+		list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
+			if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
+				ibmvfc_fail_request(evt, DID_ABORT);
+		}
+		spin_unlock_irqrestore(shost->host_lock, flags);
+	} else
+		ibmvfc_issue_fc_host_lip(shost);
+
+	scsi_target_unblock(&rport->dev);
+	LEAVE;
+}
+
+static const struct {
+	enum ibmvfc_async_event ae;
+	const char *desc;
+} ae_desc [] = {
+	{ IBMVFC_AE_ELS_PLOGI,		"PLOGI" },
+	{ IBMVFC_AE_ELS_LOGO,		"LOGO" },
+	{ IBMVFC_AE_ELS_PRLO,		"PRLO" },
+	{ IBMVFC_AE_SCN_NPORT,		"N-Port SCN" },
+	{ IBMVFC_AE_SCN_GROUP,		"Group SCN" },
+	{ IBMVFC_AE_SCN_DOMAIN,		"Domain SCN" },
+	{ IBMVFC_AE_SCN_FABRIC,		"Fabric SCN" },
+	{ IBMVFC_AE_LINK_UP,		"Link Up" },
+	{ IBMVFC_AE_LINK_DOWN,		"Link Down" },
+	{ IBMVFC_AE_LINK_DEAD,		"Link Dead" },
+	{ IBMVFC_AE_HALT,			"Halt" },
+	{ IBMVFC_AE_RESUME,		"Resume" },
+	{ IBMVFC_AE_ADAPTER_FAILED,	"Adapter Failed" },
+};
+
+static const char *unknown_ae = "Unknown async";
+
+/**
+ * ibmvfc_get_ae_desc - Get text description for async event
+ * @ae:	async event
+ *
+ **/
+static const char *ibmvfc_get_ae_desc(u64 ae)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
+		if (ae_desc[i].ae == ae)
+			return ae_desc[i].desc;
+
+	return unknown_ae;
+}
+
+/**
+ * ibmvfc_handle_async - Handle an async event from the adapter
+ * @crq:	crq to process
+ * @vhost:	ibmvfc host struct
+ *
+ **/
+static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
+				struct ibmvfc_host *vhost)
+{
+	const char *desc = ibmvfc_get_ae_desc(crq->event);
+
+	ibmvfc_log(vhost, 2, "%s event received\n", desc);
+
+	switch (crq->event) {
+	case IBMVFC_AE_LINK_UP:
+	case IBMVFC_AE_RESUME:
+		vhost->events_to_log |= IBMVFC_AE_LINKUP;
+		ibmvfc_init_host(vhost);
+		break;
+	case IBMVFC_AE_SCN_FABRIC:
+		vhost->events_to_log |= IBMVFC_AE_RSCN;
+		ibmvfc_init_host(vhost);
+		break;
+	case IBMVFC_AE_SCN_NPORT:
+	case IBMVFC_AE_SCN_GROUP:
+	case IBMVFC_AE_SCN_DOMAIN:
+		vhost->events_to_log |= IBMVFC_AE_RSCN;
+	case IBMVFC_AE_ELS_LOGO:
+	case IBMVFC_AE_ELS_PRLO:
+	case IBMVFC_AE_ELS_PLOGI:
+		ibmvfc_reinit_host(vhost);
+		break;
+	case IBMVFC_AE_LINK_DOWN:
+	case IBMVFC_AE_ADAPTER_FAILED:
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+		break;
+	case IBMVFC_AE_LINK_DEAD:
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		break;
+	case IBMVFC_AE_HALT:
+		ibmvfc_link_down(vhost, IBMVFC_HALTED);
+		break;
+	default:
+		dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event);
+		break;
+	};
+}
+
+/**
+ * ibmvfc_handle_crq - Handles and frees received events in the CRQ
+ * @crq:	Command/Response queue
+ * @vhost:	ibmvfc host struct
+ *
+ **/
+static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
+{
+	long rc;
+	struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
+
+	switch (crq->valid) {
+	case IBMVFC_CRQ_INIT_RSP:
+		switch (crq->format) {
+		case IBMVFC_CRQ_INIT:
+			dev_info(vhost->dev, "Partner initialized\n");
+			/* Send back a response */
+			rc = ibmvfc_send_crq_init_complete(vhost);
+			if (rc == 0)
+				ibmvfc_init_host(vhost);
+			else
+				dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
+			break;
+		case IBMVFC_CRQ_INIT_COMPLETE:
+			dev_info(vhost->dev, "Partner initialization complete\n");
+			ibmvfc_init_host(vhost);
+			break;
+		default:
+			dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
+		}
+		return;
+	case IBMVFC_CRQ_XPORT_EVENT:
+		vhost->state = IBMVFC_NO_CRQ;
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
+		if (crq->format == IBMVFC_PARTITION_MIGRATED) {
+			/* We need to re-setup the interpartition connection */
+			dev_info(vhost->dev, "Re-enabling adapter\n");
+			vhost->client_migrated = 1;
+			ibmvfc_purge_requests(vhost, DID_REQUEUE);
+			if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
+			    (rc = ibmvfc_send_crq_init(vhost))) {
+				ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+				dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
+			} else
+				ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+		} else {
+			dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
+
+			ibmvfc_purge_requests(vhost, DID_ERROR);
+			if ((rc = ibmvfc_reset_crq(vhost)) ||
+			    (rc = ibmvfc_send_crq_init(vhost))) {
+				ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+				dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
+			} else
+				ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+		}
+		return;
+	case IBMVFC_CRQ_CMD_RSP:
+		break;
+	default:
+		dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
+		return;
+	}
+
+	if (crq->format == IBMVFC_ASYNC_EVENT)
+		return;
+
+	/* The only kind of payload CRQs we should get are responses to
+	 * things we send. Make sure this response is to something we
+	 * actually sent
+	 */
+	if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
+		dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n",
+			crq->ioba);
+		return;
+	}
+
+	if (unlikely(atomic_read(&evt->free))) {
+		dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n",
+			crq->ioba);
+		return;
+	}
+
+	del_timer(&evt->timer);
+	list_del(&evt->queue);
+	ibmvfc_trc_end(evt);
+	evt->done(evt);
+}
+
+/**
+ * ibmvfc_scan_finished - Check if the device scan is done.
+ * @shost:	scsi host struct
+ * @time:	current elapsed time
+ *
+ * Returns:
+ *	0 if scan is not done / 1 if scan is done
+ **/
+static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
+{
+	unsigned long flags;
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	int done = 0;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (time >= (init_timeout * HZ)) {
+		dev_info(vhost->dev, "Scan taking longer than %d seconds, "
+			 "continuing initialization\n", init_timeout);
+		done = 1;
+	}
+
+	if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
+		done = 1;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return done;
+}
+
+/**
+ * ibmvfc_slave_alloc - Setup the device's task set value
+ * @sdev:	struct scsi_device device to configure
+ *
+ * Set the device's task set value so that error handling works as
+ * expected.
+ *
+ * Returns:
+ *	0 on success / -ENXIO if device does not exist
+ **/
+static int ibmvfc_slave_alloc(struct scsi_device *sdev)
+{
+	struct Scsi_Host *shost = sdev->host;
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags = 0;
+
+	if (!rport || fc_remote_port_chkready(rport))
+		return -ENXIO;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return 0;
+}
+
+/**
+ * ibmvfc_slave_configure - Configure the device
+ * @sdev:	struct scsi_device device to configure
+ *
+ * Enable allow_restart for a device if it is a disk. Adjust the
+ * queue_depth here also.
+ *
+ * Returns:
+ *	0
+ **/
+static int ibmvfc_slave_configure(struct scsi_device *sdev)
+{
+	struct Scsi_Host *shost = sdev->host;
+	struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (sdev->type == TYPE_DISK)
+		sdev->allow_restart = 1;
+
+	if (sdev->tagged_supported) {
+		scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
+		scsi_activate_tcq(sdev, sdev->queue_depth);
+	} else
+		scsi_deactivate_tcq(sdev, sdev->queue_depth);
+
+	rport->dev_loss_tmo = dev_loss_tmo;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return 0;
+}
+
+/**
+ * ibmvfc_change_queue_depth - Change the device's queue depth
+ * @sdev:	scsi device struct
+ * @qdepth:	depth to set
+ *
+ * Return value:
+ * 	actual depth set
+ **/
+static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+	if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
+		qdepth = IBMVFC_MAX_CMDS_PER_LUN;
+
+	scsi_adjust_queue_depth(sdev, 0, qdepth);
+	return sdev->queue_depth;
+}
+
+/**
+ * ibmvfc_change_queue_type - Change the device's queue type
+ * @sdev:		scsi device struct
+ * @tag_type:	type of tags to use
+ *
+ * Return value:
+ * 	actual queue type set
+ **/
+static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
+{
+	if (sdev->tagged_supported) {
+		scsi_set_tag_type(sdev, tag_type);
+
+		if (tag_type)
+			scsi_activate_tcq(sdev, sdev->queue_depth);
+		else
+			scsi_deactivate_tcq(sdev, sdev->queue_depth);
+	} else
+		tag_type = 0;
+
+	return tag_type;
+}
+
+static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
+						 struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			vhost->login_buf->resp.partition_name);
+}
+
+static struct device_attribute ibmvfc_host_partition_name = {
+	.attr = {
+		.name = "partition_name",
+		.mode = S_IRUGO,
+	},
+	.show = ibmvfc_show_host_partition_name,
+};
+
+static ssize_t ibmvfc_show_host_device_name(struct device *dev,
+					    struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			vhost->login_buf->resp.device_name);
+}
+
+static struct device_attribute ibmvfc_host_device_name = {
+	.attr = {
+		.name = "device_name",
+		.mode = S_IRUGO,
+	},
+	.show = ibmvfc_show_host_device_name,
+};
+
+static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
+					 struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			vhost->login_buf->resp.port_loc_code);
+}
+
+static struct device_attribute ibmvfc_host_loc_code = {
+	.attr = {
+		.name = "port_loc_code",
+		.mode = S_IRUGO,
+	},
+	.show = ibmvfc_show_host_loc_code,
+};
+
+static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
+					 struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+			vhost->login_buf->resp.drc_name);
+}
+
+static struct device_attribute ibmvfc_host_drc_name = {
+	.attr = {
+		.name = "drc_name",
+		.mode = S_IRUGO,
+	},
+	.show = ibmvfc_show_host_drc_name,
+};
+
+static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
+					     struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
+}
+
+static struct device_attribute ibmvfc_host_npiv_version = {
+	.attr = {
+		.name = "npiv_version",
+		.mode = S_IRUGO,
+	},
+	.show = ibmvfc_show_host_npiv_version,
+};
+
+/**
+ * ibmvfc_show_log_level - Show the adapter's error logging level
+ * @dev:	class device struct
+ * @buf:	buffer
+ *
+ * Return value:
+ * 	number of bytes printed to buffer
+ **/
+static ssize_t ibmvfc_show_log_level(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags = 0;
+	int len;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return len;
+}
+
+/**
+ * ibmvfc_store_log_level - Change the adapter's error logging level
+ * @dev:	class device struct
+ * @buf:	buffer
+ *
+ * Return value:
+ * 	number of bytes printed to buffer
+ **/
+static ssize_t ibmvfc_store_log_level(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	vhost->log_level = simple_strtoul(buf, NULL, 10);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return strlen(buf);
+}
+
+static struct device_attribute ibmvfc_log_level_attr = {
+	.attr = {
+		.name =		"log_level",
+		.mode =		S_IRUGO | S_IWUSR,
+	},
+	.show = ibmvfc_show_log_level,
+	.store = ibmvfc_store_log_level
+};
+
+#ifdef CONFIG_SCSI_IBMVFC_TRACE
+/**
+ * ibmvfc_read_trace - Dump the adapter trace
+ * @kobj:		kobject struct
+ * @bin_attr:	bin_attribute struct
+ * @buf:		buffer
+ * @off:		offset
+ * @count:		buffer size
+ *
+ * Return value:
+ *	number of bytes printed to buffer
+ **/
+static ssize_t ibmvfc_read_trace(struct kobject *kobj,
+				 struct bin_attribute *bin_attr,
+				 char *buf, loff_t off, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct ibmvfc_host *vhost = shost_priv(shost);
+	unsigned long flags = 0;
+	int size = IBMVFC_TRACE_SIZE;
+	char *src = (char *)vhost->trace;
+
+	if (off > size)
+		return 0;
+	if (off + count > size) {
+		size -= off;
+		count = size;
+	}
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	memcpy(buf, &src[off], count);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return count;
+}
+
+static struct bin_attribute ibmvfc_trace_attr = {
+	.attr =	{
+		.name = "trace",
+		.mode = S_IRUGO,
+	},
+	.size = 0,
+	.read = ibmvfc_read_trace,
+};
+#endif
+
+static struct device_attribute *ibmvfc_attrs[] = {
+	&ibmvfc_host_partition_name,
+	&ibmvfc_host_device_name,
+	&ibmvfc_host_loc_code,
+	&ibmvfc_host_drc_name,
+	&ibmvfc_host_npiv_version,
+	&ibmvfc_log_level_attr,
+	NULL
+};
+
+static struct scsi_host_template driver_template = {
+	.module = THIS_MODULE,
+	.name = "IBM POWER Virtual FC Adapter",
+	.proc_name = IBMVFC_NAME,
+	.queuecommand = ibmvfc_queuecommand,
+	.eh_abort_handler = ibmvfc_eh_abort_handler,
+	.eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
+	.eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
+	.eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
+	.slave_alloc = ibmvfc_slave_alloc,
+	.slave_configure = ibmvfc_slave_configure,
+	.scan_finished = ibmvfc_scan_finished,
+	.change_queue_depth = ibmvfc_change_queue_depth,
+	.change_queue_type = ibmvfc_change_queue_type,
+	.cmd_per_lun = 16,
+	.can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
+	.this_id = -1,
+	.sg_tablesize = SG_ALL,
+	.max_sectors = IBMVFC_MAX_SECTORS,
+	.use_clustering = ENABLE_CLUSTERING,
+	.shost_attrs = ibmvfc_attrs,
+};
+
+/**
+ * ibmvfc_next_async_crq - Returns the next entry in async queue
+ * @vhost:	ibmvfc host struct
+ *
+ * Returns:
+ *	Pointer to next entry in queue / NULL if empty
+ **/
+static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
+	struct ibmvfc_async_crq *crq;
+
+	crq = &async_crq->msgs[async_crq->cur];
+	if (crq->valid & 0x80) {
+		if (++async_crq->cur == async_crq->size)
+			async_crq->cur = 0;
+	} else
+		crq = NULL;
+
+	return crq;
+}
+
+/**
+ * ibmvfc_next_crq - Returns the next entry in message queue
+ * @vhost:	ibmvfc host struct
+ *
+ * Returns:
+ *	Pointer to next entry in queue / NULL if empty
+ **/
+static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_crq_queue *queue = &vhost->crq;
+	struct ibmvfc_crq *crq;
+
+	crq = &queue->msgs[queue->cur];
+	if (crq->valid & 0x80) {
+		if (++queue->cur == queue->size)
+			queue->cur = 0;
+	} else
+		crq = NULL;
+
+	return crq;
+}
+
+/**
+ * ibmvfc_interrupt - Interrupt handler
+ * @irq:		number of irq to handle, not used
+ * @dev_instance: ibmvfc_host that received interrupt
+ *
+ * Returns:
+ *	IRQ_HANDLED
+ **/
+static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
+{
+	struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
+	struct vio_dev *vdev = to_vio_dev(vhost->dev);
+	struct ibmvfc_crq *crq;
+	struct ibmvfc_async_crq *async;
+	unsigned long flags;
+	int done = 0;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	vio_disable_interrupts(to_vio_dev(vhost->dev));
+	while (!done) {
+		/* Pull all the valid messages off the CRQ */
+		while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
+			ibmvfc_handle_crq(crq, vhost);
+			crq->valid = 0;
+		}
+
+		/* Pull all the valid messages off the async CRQ */
+		while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
+			ibmvfc_handle_async(async, vhost);
+			async->valid = 0;
+		}
+
+		vio_enable_interrupts(vdev);
+		if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
+			vio_disable_interrupts(vdev);
+			ibmvfc_handle_crq(crq, vhost);
+			crq->valid = 0;
+		} else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
+			vio_disable_interrupts(vdev);
+			ibmvfc_handle_async(async, vhost);
+			crq->valid = 0;
+		} else
+			done = 1;
+	}
+
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return IRQ_HANDLED;
+}
+
+/**
+ * ibmvfc_init_tgt - Set the next init job step for the target
+ * @tgt:		ibmvfc target struct
+ * @job_step:	job step to perform
+ *
+ **/
+static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
+			    void (*job_step) (struct ibmvfc_target *))
+{
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
+	tgt->job_step = job_step;
+	wake_up(&tgt->vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
+ * @tgt:		ibmvfc target struct
+ * @job_step:	initialization job step
+ *
+ **/
+static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
+				  void (*job_step) (struct ibmvfc_target *))
+{
+	if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) {
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
+		wake_up(&tgt->vhost->work_wait_q);
+	} else
+		ibmvfc_init_tgt(tgt, job_step);
+}
+
+/**
+ * ibmvfc_release_tgt - Free memory allocated for a target
+ * @kref:		kref struct
+ *
+ **/
+static void ibmvfc_release_tgt(struct kref *kref)
+{
+	struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
+	kfree(tgt);
+}
+
+/**
+ * ibmvfc_tgt_prli_done - Completion handler for Process Login
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_target *tgt = evt->tgt;
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
+	u32 status = rsp->common.status;
+
+	vhost->discovery_threads--;
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+	switch (status) {
+	case IBMVFC_MAD_SUCCESS:
+		tgt_dbg(tgt, "Process Login succeeded\n");
+		tgt->need_login = 0;
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
+		break;
+	case IBMVFC_MAD_DRIVER_FAILED:
+		break;
+	case IBMVFC_MAD_CRQ_ERROR:
+		ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
+		break;
+	case IBMVFC_MAD_FAILED:
+	default:
+		tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
+			ibmvfc_get_cmd_error(rsp->status, rsp->error),
+			rsp->status, rsp->error, status);
+		if (ibmvfc_retry_cmd(rsp->status, rsp->error))
+			ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
+		break;
+	};
+
+	kref_put(&tgt->kref, ibmvfc_release_tgt);
+	ibmvfc_free_event(evt);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_tgt_send_prli - Send a process login
+ * @tgt:	ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
+{
+	struct ibmvfc_process_login *prli;
+	struct ibmvfc_host *vhost = tgt->vhost;
+	struct ibmvfc_event *evt;
+
+	if (vhost->discovery_threads >= disc_threads)
+		return;
+
+	kref_get(&tgt->kref);
+	evt = ibmvfc_get_event(vhost);
+	vhost->discovery_threads++;
+	ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
+	evt->tgt = tgt;
+	prli = &evt->iu.prli;
+	memset(prli, 0, sizeof(*prli));
+	prli->common.version = 1;
+	prli->common.opcode = IBMVFC_PROCESS_LOGIN;
+	prli->common.length = sizeof(*prli);
+	prli->scsi_id = tgt->scsi_id;
+
+	prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
+	prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
+	prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
+
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
+	if (ibmvfc_send_event(evt, vhost, default_timeout)) {
+		vhost->discovery_threads--;
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+		kref_put(&tgt->kref, ibmvfc_release_tgt);
+	} else
+		tgt_dbg(tgt, "Sent process login\n");
+}
+
+/**
+ * ibmvfc_tgt_plogi_done - Completion handler for Port Login
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_target *tgt = evt->tgt;
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
+	u32 status = rsp->common.status;
+
+	vhost->discovery_threads--;
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+	switch (status) {
+	case IBMVFC_MAD_SUCCESS:
+		tgt_dbg(tgt, "Port Login succeeded\n");
+		if (tgt->ids.port_name &&
+		    tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
+			vhost->reinit = 1;
+			tgt_dbg(tgt, "Port re-init required\n");
+			break;
+		}
+		tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
+		tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
+		tgt->ids.port_id = tgt->scsi_id;
+		tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET;
+		memcpy(&tgt->service_parms, &rsp->service_parms,
+		       sizeof(tgt->service_parms));
+		memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
+		       sizeof(tgt->service_parms_change));
+		ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
+		break;
+	case IBMVFC_MAD_DRIVER_FAILED:
+		break;
+	case IBMVFC_MAD_CRQ_ERROR:
+		ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
+		break;
+	case IBMVFC_MAD_FAILED:
+	default:
+		tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
+			ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
+			ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
+			ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
+
+		if (ibmvfc_retry_cmd(rsp->status, rsp->error))
+			ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
+		break;
+	};
+
+	kref_put(&tgt->kref, ibmvfc_release_tgt);
+	ibmvfc_free_event(evt);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
+ * @tgt:	ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
+{
+	struct ibmvfc_port_login *plogi;
+	struct ibmvfc_host *vhost = tgt->vhost;
+	struct ibmvfc_event *evt;
+
+	if (vhost->discovery_threads >= disc_threads)
+		return;
+
+	kref_get(&tgt->kref);
+	evt = ibmvfc_get_event(vhost);
+	vhost->discovery_threads++;
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
+	ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
+	evt->tgt = tgt;
+	plogi = &evt->iu.plogi;
+	memset(plogi, 0, sizeof(*plogi));
+	plogi->common.version = 1;
+	plogi->common.opcode = IBMVFC_PORT_LOGIN;
+	plogi->common.length = sizeof(*plogi);
+	plogi->scsi_id = tgt->scsi_id;
+
+	if (ibmvfc_send_event(evt, vhost, default_timeout)) {
+		vhost->discovery_threads--;
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+		kref_put(&tgt->kref, ibmvfc_release_tgt);
+	} else
+		tgt_dbg(tgt, "Sent port login\n");
+}
+
+/**
+ * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_target *tgt = evt->tgt;
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
+	u32 status = rsp->common.status;
+
+	vhost->discovery_threads--;
+	ibmvfc_free_event(evt);
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+
+	switch (status) {
+	case IBMVFC_MAD_SUCCESS:
+		tgt_dbg(tgt, "Implicit Logout succeeded\n");
+		break;
+	case IBMVFC_MAD_DRIVER_FAILED:
+		kref_put(&tgt->kref, ibmvfc_release_tgt);
+		wake_up(&vhost->work_wait_q);
+		return;
+	case IBMVFC_MAD_FAILED:
+	default:
+		tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
+		break;
+	};
+
+	if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
+		ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
+	else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
+		 tgt->scsi_id != tgt->new_scsi_id)
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
+	kref_put(&tgt->kref, ibmvfc_release_tgt);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
+ * @tgt:		ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
+{
+	struct ibmvfc_implicit_logout *mad;
+	struct ibmvfc_host *vhost = tgt->vhost;
+	struct ibmvfc_event *evt;
+
+	if (vhost->discovery_threads >= disc_threads)
+		return;
+
+	kref_get(&tgt->kref);
+	evt = ibmvfc_get_event(vhost);
+	vhost->discovery_threads++;
+	ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
+	evt->tgt = tgt;
+	mad = &evt->iu.implicit_logout;
+	memset(mad, 0, sizeof(*mad));
+	mad->common.version = 1;
+	mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
+	mad->common.length = sizeof(*mad);
+	mad->old_scsi_id = tgt->scsi_id;
+
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
+	if (ibmvfc_send_event(evt, vhost, default_timeout)) {
+		vhost->discovery_threads--;
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+		kref_put(&tgt->kref, ibmvfc_release_tgt);
+	} else
+		tgt_dbg(tgt, "Sent Implicit Logout\n");
+}
+
+/**
+ * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_target *tgt = evt->tgt;
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
+	u32 status = rsp->common.status;
+
+	vhost->discovery_threads--;
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+	switch (status) {
+	case IBMVFC_MAD_SUCCESS:
+		tgt_dbg(tgt, "Query Target succeeded\n");
+		tgt->new_scsi_id = rsp->scsi_id;
+		if (rsp->scsi_id != tgt->scsi_id)
+			ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
+		break;
+	case IBMVFC_MAD_DRIVER_FAILED:
+		break;
+	case IBMVFC_MAD_CRQ_ERROR:
+		ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
+		break;
+	case IBMVFC_MAD_FAILED:
+	default:
+		tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
+			ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
+			ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
+			ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
+
+		if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
+		    rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
+		    rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
+			ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
+		else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
+			ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
+		break;
+	};
+
+	kref_put(&tgt->kref, ibmvfc_release_tgt);
+	ibmvfc_free_event(evt);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
+ * @tgt:	ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
+{
+	struct ibmvfc_query_tgt *query_tgt;
+	struct ibmvfc_host *vhost = tgt->vhost;
+	struct ibmvfc_event *evt;
+
+	if (vhost->discovery_threads >= disc_threads)
+		return;
+
+	kref_get(&tgt->kref);
+	evt = ibmvfc_get_event(vhost);
+	vhost->discovery_threads++;
+	evt->tgt = tgt;
+	ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
+	query_tgt = &evt->iu.query_tgt;
+	memset(query_tgt, 0, sizeof(*query_tgt));
+	query_tgt->common.version = 1;
+	query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
+	query_tgt->common.length = sizeof(*query_tgt);
+	query_tgt->wwpn = tgt->ids.port_name;
+
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
+	if (ibmvfc_send_event(evt, vhost, default_timeout)) {
+		vhost->discovery_threads--;
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+		kref_put(&tgt->kref, ibmvfc_release_tgt);
+	} else
+		tgt_dbg(tgt, "Sent Query Target\n");
+}
+
+/**
+ * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
+ * @vhost:		ibmvfc host struct
+ * @scsi_id:	SCSI ID to allocate target for
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
+{
+	struct ibmvfc_target *tgt;
+	unsigned long flags;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	list_for_each_entry(tgt, &vhost->targets, queue) {
+		if (tgt->scsi_id == scsi_id) {
+			if (tgt->need_login)
+				ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
+			goto unlock_out;
+		}
+	}
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
+	if (!tgt) {
+		dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n",
+			scsi_id);
+		return -ENOMEM;
+	}
+
+	tgt->scsi_id = scsi_id;
+	tgt->new_scsi_id = scsi_id;
+	tgt->vhost = vhost;
+	tgt->need_login = 1;
+	kref_init(&tgt->kref);
+	ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	list_add_tail(&tgt->queue, &vhost->targets);
+
+unlock_out:
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return 0;
+}
+
+/**
+ * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
+ * @vhost:		ibmvfc host struct
+ *
+ * Returns:
+ *	0 on success / other on failure
+ **/
+static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
+{
+	int i, rc;
+
+	for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
+		rc = ibmvfc_alloc_target(vhost,
+					 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
+
+	return rc;
+}
+
+/**
+ * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
+	u32 mad_status = rsp->common.status;
+
+	switch (mad_status) {
+	case IBMVFC_MAD_SUCCESS:
+		ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
+		vhost->num_targets = rsp->num_written;
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
+		break;
+	case IBMVFC_MAD_FAILED:
+		dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
+			ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
+		ibmvfc_retry_host_init(vhost);
+		break;
+	case IBMVFC_MAD_DRIVER_FAILED:
+		break;
+	default:
+		dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		break;
+	}
+
+	ibmvfc_free_event(evt);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_discover_targets - Send Discover Targets MAD
+ * @vhost:	ibmvfc host struct
+ *
+ **/
+static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_discover_targets *mad;
+	struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
+
+	ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
+	mad = &evt->iu.discover_targets;
+	memset(mad, 0, sizeof(*mad));
+	mad->common.version = 1;
+	mad->common.opcode = IBMVFC_DISC_TARGETS;
+	mad->common.length = sizeof(*mad);
+	mad->bufflen = vhost->disc_buf_sz;
+	mad->buffer.va = vhost->disc_buf_dma;
+	mad->buffer.len = vhost->disc_buf_sz;
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
+
+	if (!ibmvfc_send_event(evt, vhost, default_timeout))
+		ibmvfc_dbg(vhost, "Sent discover targets\n");
+	else
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+}
+
+/**
+ * ibmvfc_npiv_login_done - Completion handler for NPIV Login
+ * @evt:	ibmvfc event struct
+ *
+ **/
+static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
+{
+	struct ibmvfc_host *vhost = evt->vhost;
+	u32 mad_status = evt->xfer_iu->npiv_login.common.status;
+	struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
+	unsigned int npiv_max_sectors;
+
+	switch (mad_status) {
+	case IBMVFC_MAD_SUCCESS:
+		ibmvfc_free_event(evt);
+		break;
+	case IBMVFC_MAD_FAILED:
+		dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
+			ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
+		if (ibmvfc_retry_cmd(rsp->status, rsp->error))
+			ibmvfc_retry_host_init(vhost);
+		else
+			ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		ibmvfc_free_event(evt);
+		return;
+	case IBMVFC_MAD_CRQ_ERROR:
+		ibmvfc_retry_host_init(vhost);
+	case IBMVFC_MAD_DRIVER_FAILED:
+		ibmvfc_free_event(evt);
+		return;
+	default:
+		dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		ibmvfc_free_event(evt);
+		return;
+	}
+
+	vhost->client_migrated = 0;
+
+	if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
+		dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
+			rsp->flags);
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		wake_up(&vhost->work_wait_q);
+		return;
+	}
+
+	if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
+		dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
+			rsp->max_cmds);
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+		wake_up(&vhost->work_wait_q);
+		return;
+	}
+
+	npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
+	dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
+		 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
+		 rsp->drc_name, npiv_max_sectors);
+
+	fc_host_fabric_name(vhost->host) = rsp->node_name;
+	fc_host_node_name(vhost->host) = rsp->node_name;
+	fc_host_port_name(vhost->host) = rsp->port_name;
+	fc_host_port_id(vhost->host) = rsp->scsi_id;
+	fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
+	fc_host_supported_classes(vhost->host) = 0;
+	if (rsp->service_parms.class1_parms[0] & 0x80000000)
+		fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
+	if (rsp->service_parms.class2_parms[0] & 0x80000000)
+		fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
+	if (rsp->service_parms.class3_parms[0] & 0x80000000)
+		fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
+	fc_host_maxframe_size(vhost->host) =
+		rsp->service_parms.common.bb_rcv_sz & 0x0fff;
+
+	vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
+	vhost->host->max_sectors = npiv_max_sectors;
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
+	wake_up(&vhost->work_wait_q);
+}
+
+/**
+ * ibmvfc_npiv_login - Sends NPIV login
+ * @vhost:	ibmvfc host struct
+ *
+ **/
+static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_npiv_login_mad *mad;
+	struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
+
+	ibmvfc_gather_partition_info(vhost);
+	ibmvfc_set_login_info(vhost);
+	ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
+
+	memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
+	mad = &evt->iu.npiv_login;
+	memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
+	mad->common.version = 1;
+	mad->common.opcode = IBMVFC_NPIV_LOGIN;
+	mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
+	mad->buffer.va = vhost->login_buf_dma;
+	mad->buffer.len = sizeof(*vhost->login_buf);
+
+	memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
+	vhost->async_crq.cur = 0;
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
+
+	if (!ibmvfc_send_event(evt, vhost, default_timeout))
+		ibmvfc_dbg(vhost, "Sent NPIV login\n");
+	else
+		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+};
+
+/**
+ * ibmvfc_dev_init_to_do - Is there target initialization work to do?
+ * @vhost:		ibmvfc host struct
+ *
+ * Returns:
+ *	1 if work to do / 0 if not
+ **/
+static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_target *tgt;
+
+	list_for_each_entry(tgt, &vhost->targets, queue) {
+		if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
+		    tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
+			return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
+ * @vhost:		ibmvfc host struct
+ *
+ * Returns:
+ *	1 if work to do / 0 if not
+ **/
+static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_target *tgt;
+
+	if (kthread_should_stop())
+		return 1;
+	switch (vhost->action) {
+	case IBMVFC_HOST_ACTION_NONE:
+	case IBMVFC_HOST_ACTION_INIT_WAIT:
+		return 0;
+	case IBMVFC_HOST_ACTION_TGT_INIT:
+	case IBMVFC_HOST_ACTION_QUERY_TGTS:
+		if (vhost->discovery_threads == disc_threads)
+			return 0;
+		list_for_each_entry(tgt, &vhost->targets, queue)
+			if (tgt->action == IBMVFC_TGT_ACTION_INIT)
+				return 1;
+		list_for_each_entry(tgt, &vhost->targets, queue)
+			if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
+				return 0;
+		return 1;
+	case IBMVFC_HOST_ACTION_INIT:
+	case IBMVFC_HOST_ACTION_ALLOC_TGTS:
+	case IBMVFC_HOST_ACTION_TGT_ADD:
+	case IBMVFC_HOST_ACTION_TGT_DEL:
+	case IBMVFC_HOST_ACTION_QUERY:
+	default:
+		break;
+	};
+
+	return 1;
+}
+
+/**
+ * ibmvfc_work_to_do - Is there task level work to do?
+ * @vhost:		ibmvfc host struct
+ *
+ * Returns:
+ *	1 if work to do / 0 if not
+ **/
+static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
+{
+	unsigned long flags;
+	int rc;
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	rc = __ibmvfc_work_to_do(vhost);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return rc;
+}
+
+/**
+ * ibmvfc_log_ae - Log async events if necessary
+ * @vhost:		ibmvfc host struct
+ * @events:		events to log
+ *
+ **/
+static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
+{
+	if (events & IBMVFC_AE_RSCN)
+		fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
+	if ((events & IBMVFC_AE_LINKDOWN) &&
+	    vhost->state >= IBMVFC_HALTED)
+		fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
+	if ((events & IBMVFC_AE_LINKUP) &&
+	    vhost->state == IBMVFC_INITIALIZING)
+		fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
+}
+
+/**
+ * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
+ * @tgt:		ibmvfc target struct
+ *
+ **/
+static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
+{
+	struct ibmvfc_host *vhost = tgt->vhost;
+	struct fc_rport *rport;
+	unsigned long flags;
+
+	tgt_dbg(tgt, "Adding rport\n");
+	rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	tgt->rport = rport;
+	ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
+	if (rport) {
+		tgt_dbg(tgt, "rport add succeeded\n");
+		rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
+		rport->supported_classes = 0;
+		if (tgt->service_parms.class1_parms[0] & 0x80000000)
+			rport->supported_classes |= FC_COS_CLASS1;
+		if (tgt->service_parms.class2_parms[0] & 0x80000000)
+			rport->supported_classes |= FC_COS_CLASS2;
+		if (tgt->service_parms.class3_parms[0] & 0x80000000)
+			rport->supported_classes |= FC_COS_CLASS3;
+	} else
+		tgt_dbg(tgt, "rport add failed\n");
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+}
+
+/**
+ * ibmvfc_do_work - Do task level work
+ * @vhost:		ibmvfc host struct
+ *
+ **/
+static void ibmvfc_do_work(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_target *tgt;
+	unsigned long flags;
+	struct fc_rport *rport;
+
+	ibmvfc_log_ae(vhost, vhost->events_to_log);
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	vhost->events_to_log = 0;
+	switch (vhost->action) {
+	case IBMVFC_HOST_ACTION_NONE:
+	case IBMVFC_HOST_ACTION_INIT_WAIT:
+		break;
+	case IBMVFC_HOST_ACTION_INIT:
+		BUG_ON(vhost->state != IBMVFC_INITIALIZING);
+		vhost->job_step(vhost);
+		break;
+	case IBMVFC_HOST_ACTION_QUERY:
+		list_for_each_entry(tgt, &vhost->targets, queue)
+			ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
+		break;
+	case IBMVFC_HOST_ACTION_QUERY_TGTS:
+		list_for_each_entry(tgt, &vhost->targets, queue) {
+			if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
+				tgt->job_step(tgt);
+				break;
+			}
+		}
+
+		if (!ibmvfc_dev_init_to_do(vhost))
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
+		break;
+	case IBMVFC_HOST_ACTION_TGT_DEL:
+		list_for_each_entry(tgt, &vhost->targets, queue) {
+			if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
+				tgt_dbg(tgt, "Deleting rport\n");
+				rport = tgt->rport;
+				tgt->rport = NULL;
+				list_del(&tgt->queue);
+				spin_unlock_irqrestore(vhost->host->host_lock, flags);
+				if (rport)
+					fc_remote_port_delete(rport);
+				kref_put(&tgt->kref, ibmvfc_release_tgt);
+				return;
+			}
+		}
+
+		if (vhost->state == IBMVFC_INITIALIZING) {
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
+			vhost->job_step = ibmvfc_discover_targets;
+		} else {
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
+			spin_unlock_irqrestore(vhost->host->host_lock, flags);
+			scsi_unblock_requests(vhost->host);
+			wake_up(&vhost->init_wait_q);
+			return;
+		}
+		break;
+	case IBMVFC_HOST_ACTION_ALLOC_TGTS:
+		ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		ibmvfc_alloc_targets(vhost);
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		break;
+	case IBMVFC_HOST_ACTION_TGT_INIT:
+		list_for_each_entry(tgt, &vhost->targets, queue) {
+			if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
+				tgt->job_step(tgt);
+				break;
+			}
+		}
+
+		if (!ibmvfc_dev_init_to_do(vhost)) {
+			ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
+			vhost->init_retries = 0;
+			spin_unlock_irqrestore(vhost->host->host_lock, flags);
+			scsi_unblock_requests(vhost->host);
+			return;
+		}
+		break;
+	case IBMVFC_HOST_ACTION_TGT_ADD:
+		list_for_each_entry(tgt, &vhost->targets, queue) {
+			if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
+				spin_unlock_irqrestore(vhost->host->host_lock, flags);
+				ibmvfc_tgt_add_rport(tgt);
+				return;
+			} else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
+				tgt_dbg(tgt, "Deleting rport\n");
+				rport = tgt->rport;
+				tgt->rport = NULL;
+				list_del(&tgt->queue);
+				spin_unlock_irqrestore(vhost->host->host_lock, flags);
+				if (rport)
+					fc_remote_port_delete(rport);
+				kref_put(&tgt->kref, ibmvfc_release_tgt);
+				return;
+			}
+		}
+
+		if (vhost->reinit) {
+			vhost->reinit = 0;
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
+		} else {
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
+			wake_up(&vhost->init_wait_q);
+		}
+		break;
+	default:
+		break;
+	};
+
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+}
+
+/**
+ * ibmvfc_work - Do task level work
+ * @data:		ibmvfc host struct
+ *
+ * Returns:
+ *	zero
+ **/
+static int ibmvfc_work(void *data)
+{
+	struct ibmvfc_host *vhost = data;
+	int rc;
+
+	set_user_nice(current, -20);
+
+	while (1) {
+		rc = wait_event_interruptible(vhost->work_wait_q,
+					      ibmvfc_work_to_do(vhost));
+
+		BUG_ON(rc);
+
+		if (kthread_should_stop())
+			break;
+
+		ibmvfc_do_work(vhost);
+	}
+
+	ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
+	return 0;
+}
+
+/**
+ * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
+ * @vhost:	ibmvfc host struct
+ *
+ * Allocates a page for messages, maps it for dma, and registers
+ * the crq with the hypervisor.
+ *
+ * Return value:
+ *	zero on success / other on failure
+ **/
+static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
+{
+	int rc, retrc = -ENOMEM;
+	struct device *dev = vhost->dev;
+	struct vio_dev *vdev = to_vio_dev(dev);
+	struct ibmvfc_crq_queue *crq = &vhost->crq;
+
+	ENTER;
+	crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
+
+	if (!crq->msgs)
+		return -ENOMEM;
+
+	crq->size = PAGE_SIZE / sizeof(*crq->msgs);
+	crq->msg_token = dma_map_single(dev, crq->msgs,
+					PAGE_SIZE, DMA_BIDIRECTIONAL);
+
+	if (dma_mapping_error(crq->msg_token))
+		goto map_failed;
+
+	retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+					crq->msg_token, PAGE_SIZE);
+
+	if (rc == H_RESOURCE)
+		/* maybe kexecing and resource is busy. try a reset */
+		retrc = rc = ibmvfc_reset_crq(vhost);
+
+	if (rc == H_CLOSED)
+		dev_warn(dev, "Partner adapter not ready\n");
+	else if (rc) {
+		dev_warn(dev, "Error %d opening adapter\n", rc);
+		goto reg_crq_failed;
+	}
+
+	retrc = 0;
+
+	if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
+		dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
+		goto req_irq_failed;
+	}
+
+	if ((rc = vio_enable_interrupts(vdev))) {
+		dev_err(dev, "Error %d enabling interrupts\n", rc);
+		goto req_irq_failed;
+	}
+
+	crq->cur = 0;
+	LEAVE;
+	return retrc;
+
+req_irq_failed:
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+reg_crq_failed:
+	dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
+map_failed:
+	free_page((unsigned long)crq->msgs);
+	return retrc;
+}
+
+/**
+ * ibmvfc_free_mem - Free memory for vhost
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ * 	none
+ **/
+static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
+
+	ENTER;
+	mempool_destroy(vhost->tgt_pool);
+	kfree(vhost->trace);
+	dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
+			  vhost->disc_buf_dma);
+	dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
+			  vhost->login_buf, vhost->login_buf_dma);
+	dma_pool_destroy(vhost->sg_pool);
+	dma_unmap_single(vhost->dev, async_q->msg_token,
+			 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
+	free_page((unsigned long)async_q->msgs);
+	LEAVE;
+}
+
+/**
+ * ibmvfc_alloc_mem - Allocate memory for vhost
+ * @vhost:	ibmvfc host struct
+ *
+ * Return value:
+ * 	0 on success / non-zero on failure
+ **/
+static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
+{
+	struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
+	struct device *dev = vhost->dev;
+
+	ENTER;
+	async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
+	if (!async_q->msgs) {
+		dev_err(dev, "Couldn't allocate async queue.\n");
+		goto nomem;
+	}
+
+	async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
+	async_q->msg_token = dma_map_single(dev, async_q->msgs,
+					    async_q->size * sizeof(*async_q->msgs),
+					    DMA_BIDIRECTIONAL);
+
+	if (dma_mapping_error(async_q->msg_token)) {
+		dev_err(dev, "Failed to map async queue\n");
+		goto free_async_crq;
+	}
+
+	vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
+					 SG_ALL * sizeof(struct srp_direct_buf),
+					 sizeof(struct srp_direct_buf), 0);
+
+	if (!vhost->sg_pool) {
+		dev_err(dev, "Failed to allocate sg pool\n");
+		goto unmap_async_crq;
+	}
+
+	vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
+					      &vhost->login_buf_dma, GFP_KERNEL);
+
+	if (!vhost->login_buf) {
+		dev_err(dev, "Couldn't allocate NPIV login buffer\n");
+		goto free_sg_pool;
+	}
+
+	vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
+	vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
+					     &vhost->disc_buf_dma, GFP_KERNEL);
+
+	if (!vhost->disc_buf) {
+		dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
+		goto free_login_buffer;
+	}
+
+	vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
+			       sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
+
+	if (!vhost->trace)
+		goto free_disc_buffer;
+
+	vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
+						      sizeof(struct ibmvfc_target));
+
+	if (!vhost->tgt_pool) {
+		dev_err(dev, "Couldn't allocate target memory pool\n");
+		goto free_trace;
+	}
+
+	LEAVE;
+	return 0;
+
+free_trace:
+	kfree(vhost->trace);
+free_disc_buffer:
+	dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
+			  vhost->disc_buf_dma);
+free_login_buffer:
+	dma_free_coherent(dev, sizeof(*vhost->login_buf),
+			  vhost->login_buf, vhost->login_buf_dma);
+free_sg_pool:
+	dma_pool_destroy(vhost->sg_pool);
+unmap_async_crq:
+	dma_unmap_single(dev, async_q->msg_token,
+			 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
+free_async_crq:
+	free_page((unsigned long)async_q->msgs);
+nomem:
+	LEAVE;
+	return -ENOMEM;
+}
+
+/**
+ * ibmvfc_probe - Adapter hot plug add entry point
+ * @vdev:	vio device struct
+ * @id:	vio device id struct
+ *
+ * Return value:
+ * 	0 on success / non-zero on failure
+ **/
+static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+{
+	struct ibmvfc_host *vhost;
+	struct Scsi_Host *shost;
+	struct device *dev = &vdev->dev;
+	int rc = -ENOMEM;
+
+	ENTER;
+	shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
+	if (!shost) {
+		dev_err(dev, "Couldn't allocate host data\n");
+		goto out;
+	}
+
+	shost->transportt = ibmvfc_transport_template;
+	shost->can_queue = max_requests;
+	shost->max_lun = max_lun;
+	shost->max_id = max_targets;
+	shost->max_sectors = IBMVFC_MAX_SECTORS;
+	shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
+	shost->unique_id = shost->host_no;
+
+	vhost = shost_priv(shost);
+	INIT_LIST_HEAD(&vhost->sent);
+	INIT_LIST_HEAD(&vhost->free);
+	INIT_LIST_HEAD(&vhost->targets);
+	sprintf(vhost->name, IBMVFC_NAME);
+	vhost->host = shost;
+	vhost->dev = dev;
+	vhost->partition_number = -1;
+	vhost->log_level = log_level;
+	strcpy(vhost->partition_name, "UNKNOWN");
+	init_waitqueue_head(&vhost->work_wait_q);
+	init_waitqueue_head(&vhost->init_wait_q);
+
+	if ((rc = ibmvfc_alloc_mem(vhost)))
+		goto free_scsi_host;
+
+	vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
+					 shost->host_no);
+
+	if (IS_ERR(vhost->work_thread)) {
+		dev_err(dev, "Couldn't create kernel thread: %ld\n",
+			PTR_ERR(vhost->work_thread));
+		goto free_host_mem;
+	}
+
+	if ((rc = ibmvfc_init_crq(vhost))) {
+		dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
+		goto kill_kthread;
+	}
+
+	if ((rc = ibmvfc_init_event_pool(vhost))) {
+		dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
+		goto release_crq;
+	}
+
+	if ((rc = scsi_add_host(shost, dev)))
+		goto release_event_pool;
+
+	if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
+					   &ibmvfc_trace_attr))) {
+		dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
+		goto remove_shost;
+	}
+
+	dev_set_drvdata(dev, vhost);
+	spin_lock(&ibmvfc_driver_lock);
+	list_add_tail(&vhost->queue, &ibmvfc_head);
+	spin_unlock(&ibmvfc_driver_lock);
+
+	ibmvfc_send_crq_init(vhost);
+	scsi_scan_host(shost);
+	return 0;
+
+remove_shost:
+	scsi_remove_host(shost);
+release_event_pool:
+	ibmvfc_free_event_pool(vhost);
+release_crq:
+	ibmvfc_release_crq_queue(vhost);
+kill_kthread:
+	kthread_stop(vhost->work_thread);
+free_host_mem:
+	ibmvfc_free_mem(vhost);
+free_scsi_host:
+	scsi_host_put(shost);
+out:
+	LEAVE;
+	return rc;
+}
+
+/**
+ * ibmvfc_remove - Adapter hot plug remove entry point
+ * @vdev:	vio device struct
+ *
+ * Return value:
+ * 	0
+ **/
+static int ibmvfc_remove(struct vio_dev *vdev)
+{
+	struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
+	unsigned long flags;
+
+	ENTER;
+	ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
+	kthread_stop(vhost->work_thread);
+	fc_remove_host(vhost->host);
+	scsi_remove_host(vhost->host);
+	ibmvfc_release_crq_queue(vhost);
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	ibmvfc_purge_requests(vhost, DID_ERROR);
+	ibmvfc_free_event_pool(vhost);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	ibmvfc_free_mem(vhost);
+	spin_lock(&ibmvfc_driver_lock);
+	list_del(&vhost->queue);
+	spin_unlock(&ibmvfc_driver_lock);
+	scsi_host_put(vhost->host);
+	LEAVE;
+	return 0;
+}
+
+static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
+	{"fcp", "IBM,vfc-client"},
+	{ "", "" }
+};
+MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
+
+static struct vio_driver ibmvfc_driver = {
+	.id_table = ibmvfc_device_table,
+	.probe = ibmvfc_probe,
+	.remove = ibmvfc_remove,
+	.driver = {
+		.name = IBMVFC_NAME,
+		.owner = THIS_MODULE,
+	}
+};
+
+static struct fc_function_template ibmvfc_transport_functions = {
+	.show_host_fabric_name = 1,
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+	.show_host_port_type = 1,
+	.show_host_port_id = 1,
+
+	.get_host_port_state = ibmvfc_get_host_port_state,
+	.show_host_port_state = 1,
+
+	.get_host_speed = ibmvfc_get_host_speed,
+	.show_host_speed = 1,
+
+	.issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
+	.terminate_rport_io = ibmvfc_terminate_rport_io,
+
+	.show_rport_maxframe_size = 1,
+	.show_rport_supported_classes = 1,
+
+	.set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+
+	.get_starget_node_name = ibmvfc_get_starget_node_name,
+	.show_starget_node_name = 1,
+
+	.get_starget_port_name = ibmvfc_get_starget_port_name,
+	.show_starget_port_name = 1,
+
+	.get_starget_port_id = ibmvfc_get_starget_port_id,
+	.show_starget_port_id = 1,
+};
+
+/**
+ * ibmvfc_module_init - Initialize the ibmvfc module
+ *
+ * Return value:
+ * 	0 on success / other on failure
+ **/
+static int __init ibmvfc_module_init(void)
+{
+	int rc;
+
+	if (!firmware_has_feature(FW_FEATURE_VIO))
+		return -ENODEV;
+
+	printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
+	       IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
+
+	ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
+	if (!ibmvfc_transport_template)
+		return -ENOMEM;
+
+	rc = vio_register_driver(&ibmvfc_driver);
+	if (rc)
+		fc_release_transport(ibmvfc_transport_template);
+	return rc;
+}
+
+/**
+ * ibmvfc_module_exit - Teardown the ibmvfc module
+ *
+ * Return value:
+ * 	nothing
+ **/
+static void __exit ibmvfc_module_exit(void)
+{
+	vio_unregister_driver(&ibmvfc_driver);
+	fc_release_transport(ibmvfc_transport_template);
+}
+
+module_init(ibmvfc_module_init);
+module_exit(ibmvfc_module_exit);
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
new file mode 100644
index 000000000000..057f3c01ed61
--- /dev/null
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -0,0 +1,682 @@
+/*
+ * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
+ *
+ * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
+ *
+ * Copyright (C) IBM Corporation, 2008
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef _IBMVFC_H
+#define _IBMVFC_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include "viosrp.h"
+
+#define IBMVFC_NAME	"ibmvfc"
+#define IBMVFC_DRIVER_VERSION		"1.0.0"
+#define IBMVFC_DRIVER_DATE		"(July 1, 2008)"
+
+#define IBMVFC_DEFAULT_TIMEOUT	15
+#define IBMVFC_INIT_TIMEOUT		30
+#define IBMVFC_MAX_REQUESTS_DEFAULT	100
+
+#define IBMVFC_DEBUG			0
+#define IBMVFC_MAX_TARGETS		1024
+#define IBMVFC_MAX_LUN			0xffffffff
+#define IBMVFC_MAX_SECTORS		0xffffu
+#define IBMVFC_MAX_DISC_THREADS	4
+#define IBMVFC_TGT_MEMPOOL_SZ		64
+#define IBMVFC_MAX_CMDS_PER_LUN	64
+#define IBMVFC_MAX_INIT_RETRIES	3
+#define IBMVFC_DEV_LOSS_TMO		(5 * 60)
+#define IBMVFC_DEFAULT_LOG_LEVEL	2
+#define IBMVFC_MAX_CDB_LEN		16
+
+/*
+ * Ensure we have resources for ERP and initialization:
+ * 1 for ERP
+ * 1 for initialization
+ * 1 for each discovery thread
+ */
+#define IBMVFC_NUM_INTERNAL_REQ	(1 + 1 + disc_threads)
+
+#define IBMVFC_MAD_SUCCESS		0x00
+#define IBMVFC_MAD_NOT_SUPPORTED	0xF1
+#define IBMVFC_MAD_FAILED		0xF7
+#define IBMVFC_MAD_DRIVER_FAILED	0xEE
+#define IBMVFC_MAD_CRQ_ERROR		0xEF
+
+enum ibmvfc_crq_valid {
+	IBMVFC_CRQ_CMD_RSP		= 0x80,
+	IBMVFC_CRQ_INIT_RSP		= 0xC0,
+	IBMVFC_CRQ_XPORT_EVENT		= 0xFF,
+};
+
+enum ibmvfc_crq_format {
+	IBMVFC_CRQ_INIT			= 0x01,
+	IBMVFC_CRQ_INIT_COMPLETE	= 0x02,
+	IBMVFC_PARTITION_MIGRATED	= 0x06,
+};
+
+enum ibmvfc_cmd_status_flags {
+	IBMVFC_FABRIC_MAPPED		= 0x0001,
+	IBMVFC_VIOS_FAILURE		= 0x0002,
+	IBMVFC_FC_FAILURE			= 0x0004,
+	IBMVFC_FC_SCSI_ERROR		= 0x0008,
+	IBMVFC_HW_EVENT_LOGGED		= 0x0010,
+	IBMVFC_VIOS_LOGGED		= 0x0020,
+};
+
+enum ibmvfc_fabric_mapped_errors {
+	IBMVFC_UNABLE_TO_ESTABLISH	= 0x0001,
+	IBMVFC_XPORT_FAULT		= 0x0002,
+	IBMVFC_CMD_TIMEOUT		= 0x0003,
+	IBMVFC_ENETDOWN			= 0x0004,
+	IBMVFC_HW_FAILURE			= 0x0005,
+	IBMVFC_LINK_DOWN_ERR		= 0x0006,
+	IBMVFC_LINK_DEAD_ERR		= 0x0007,
+	IBMVFC_UNABLE_TO_REGISTER	= 0x0008,
+	IBMVFC_XPORT_BUSY			= 0x000A,
+	IBMVFC_XPORT_DEAD			= 0x000B,
+	IBMVFC_CONFIG_ERROR		= 0x000C,
+	IBMVFC_NAME_SERVER_FAIL		= 0x000D,
+	IBMVFC_LINK_HALTED		= 0x000E,
+	IBMVFC_XPORT_GENERAL		= 0x8000,
+};
+
+enum ibmvfc_vios_errors {
+	IBMVFC_CRQ_FAILURE			= 0x0001,
+	IBMVFC_SW_FAILURE				= 0x0002,
+	IBMVFC_INVALID_PARAMETER		= 0x0003,
+	IBMVFC_MISSING_PARAMETER		= 0x0004,
+	IBMVFC_HOST_IO_BUS			= 0x0005,
+	IBMVFC_TRANS_CANCELLED			= 0x0006,
+	IBMVFC_TRANS_CANCELLED_IMPLICIT	= 0x0007,
+	IBMVFC_INSUFFICIENT_RESOURCE		= 0x0008,
+	IBMVFC_COMMAND_FAILED			= 0x8000,
+};
+
+enum ibmvfc_mad_types {
+	IBMVFC_NPIV_LOGIN		= 0x0001,
+	IBMVFC_DISC_TARGETS	= 0x0002,
+	IBMVFC_PORT_LOGIN		= 0x0004,
+	IBMVFC_PROCESS_LOGIN	= 0x0008,
+	IBMVFC_QUERY_TARGET	= 0x0010,
+	IBMVFC_IMPLICIT_LOGOUT	= 0x0040,
+	IBMVFC_TMF_MAD		= 0x0100,
+};
+
+struct ibmvfc_mad_common {
+	u32 version;
+	u32 reserved;
+	u32 opcode;
+	u16 status;
+	u16 length;
+	u64 tag;
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_npiv_login_mad {
+	struct ibmvfc_mad_common common;
+	struct srp_direct_buf buffer;
+}__attribute__((packed, aligned (8)));
+
+#define IBMVFC_MAX_NAME 256
+
+struct ibmvfc_npiv_login {
+	u32 ostype;
+#define IBMVFC_OS_LINUX	0x02
+	u32 pad;
+	u64 max_dma_len;
+	u32 max_payload;
+	u32 max_response;
+	u32 partition_num;
+	u32 vfc_frame_version;
+	u16 fcp_version;
+	u16 flags;
+#define IBMVFC_CLIENT_MIGRATED	0x01
+#define IBMVFC_FLUSH_ON_HALT		0x02
+	u32 max_cmds;
+	u64 capabilities;
+#define IBMVFC_CAN_MIGRATE		0x01
+	u64 node_name;
+	struct srp_direct_buf async;
+	u8 partition_name[IBMVFC_MAX_NAME];
+	u8 device_name[IBMVFC_MAX_NAME];
+	u8 drc_name[IBMVFC_MAX_NAME];
+	u64 reserved2[2];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_common_svc_parms {
+	u16 fcph_version;
+	u16 b2b_credit;
+	u16 features;
+	u16 bb_rcv_sz; /* upper nibble is BB_SC_N */
+	u32 ratov;
+	u32 edtov;
+}__attribute__((packed, aligned (4)));
+
+struct ibmvfc_service_parms {
+	struct ibmvfc_common_svc_parms common;
+	u8 port_name[8];
+	u8 node_name[8];
+	u32 class1_parms[4];
+	u32 class2_parms[4];
+	u32 class3_parms[4];
+	u32 obsolete[4];
+	u32 vendor_version[4];
+	u32 services_avail[2];
+	u32 ext_len;
+	u32 reserved[30];
+	u32 clk_sync_qos[2];
+}__attribute__((packed, aligned (4)));
+
+struct ibmvfc_npiv_login_resp {
+	u32 version;
+	u16 status;
+	u16 error;
+	u32 flags;
+#define IBMVFC_NATIVE_FC		0x01
+#define IBMVFC_CAN_FLUSH_ON_HALT	0x08
+	u32 reserved;
+	u64 capabilites;
+	u32 max_cmds;
+	u32 scsi_id_sz;
+	u64 max_dma_len;
+	u64 scsi_id;
+	u64 port_name;
+	u64 node_name;
+	u64 link_speed;
+	u8 partition_name[IBMVFC_MAX_NAME];
+	u8 device_name[IBMVFC_MAX_NAME];
+	u8 port_loc_code[IBMVFC_MAX_NAME];
+	u8 drc_name[IBMVFC_MAX_NAME];
+	struct ibmvfc_service_parms service_parms;
+	u64 reserved2;
+}__attribute__((packed, aligned (8)));
+
+union ibmvfc_npiv_login_data {
+	struct ibmvfc_npiv_login login;
+	struct ibmvfc_npiv_login_resp resp;
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_discover_targets_buf {
+	u32 scsi_id[1];
+#define IBMVFC_DISC_TGT_SCSI_ID_MASK	0x00ffffff
+};
+
+struct ibmvfc_discover_targets {
+	struct ibmvfc_mad_common common;
+	struct srp_direct_buf buffer;
+	u32 flags;
+	u16 status;
+	u16 error;
+	u32 bufflen;
+	u32 num_avail;
+	u32 num_written;
+	u64 reserved[2];
+}__attribute__((packed, aligned (8)));
+
+enum ibmvfc_fc_reason {
+	IBMVFC_INVALID_ELS_CMD_CODE	= 0x01,
+	IBMVFC_INVALID_VERSION		= 0x02,
+	IBMVFC_LOGICAL_ERROR		= 0x03,
+	IBMVFC_INVALID_CT_IU_SIZE	= 0x04,
+	IBMVFC_LOGICAL_BUSY		= 0x05,
+	IBMVFC_PROTOCOL_ERROR		= 0x07,
+	IBMVFC_UNABLE_TO_PERFORM_REQ	= 0x09,
+	IBMVFC_CMD_NOT_SUPPORTED	= 0x0B,
+	IBMVFC_SERVER_NOT_AVAIL		= 0x0D,
+	IBMVFC_CMD_IN_PROGRESS		= 0x0E,
+	IBMVFC_VENDOR_SPECIFIC		= 0xFF,
+};
+
+enum ibmvfc_fc_type {
+	IBMVFC_FABRIC_REJECT	= 0x01,
+	IBMVFC_PORT_REJECT	= 0x02,
+	IBMVFC_LS_REJECT		= 0x03,
+	IBMVFC_FABRIC_BUSY	= 0x04,
+	IBMVFC_PORT_BUSY		= 0x05,
+	IBMVFC_BASIC_REJECT	= 0x06,
+};
+
+enum ibmvfc_gs_explain {
+	IBMVFC_PORT_NAME_NOT_REG	= 0x02,
+};
+
+struct ibmvfc_port_login {
+	struct ibmvfc_mad_common common;
+	u64 scsi_id;
+	u16 reserved;
+	u16 fc_service_class;
+	u32 blksz;
+	u32 hdr_per_blk;
+	u16 status;
+	u16 error;		/* also fc_reason */
+	u16 fc_explain;
+	u16 fc_type;
+	u32 reserved2;
+	struct ibmvfc_service_parms service_parms;
+	struct ibmvfc_service_parms service_parms_change;
+	u64 reserved3[2];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_prli_svc_parms {
+	u8 type;
+#define IBMVFC_SCSI_FCP_TYPE		0x08
+	u8 type_ext;
+	u16 flags;
+#define IBMVFC_PRLI_ORIG_PA_VALID			0x8000
+#define IBMVFC_PRLI_RESP_PA_VALID			0x4000
+#define IBMVFC_PRLI_EST_IMG_PAIR			0x2000
+	u32 orig_pa;
+	u32 resp_pa;
+	u32 service_parms;
+#define IBMVFC_PRLI_TASK_RETRY			0x00000200
+#define IBMVFC_PRLI_RETRY				0x00000100
+#define IBMVFC_PRLI_DATA_OVERLAY			0x00000040
+#define IBMVFC_PRLI_INITIATOR_FUNC			0x00000020
+#define IBMVFC_PRLI_TARGET_FUNC			0x00000010
+#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED	0x00000002
+#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED	0x00000001
+}__attribute__((packed, aligned (4)));
+
+struct ibmvfc_process_login {
+	struct ibmvfc_mad_common common;
+	u64 scsi_id;
+	struct ibmvfc_prli_svc_parms parms;
+	u8 reserved[48];
+	u16 status;
+	u16 error;			/* also fc_reason */
+	u32 reserved2;
+	u64 reserved3[2];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_query_tgt {
+	struct ibmvfc_mad_common common;
+	u64 wwpn;
+	u64 scsi_id;
+	u16 status;
+	u16 error;
+	u16 fc_explain;
+	u16 fc_type;
+	u64 reserved[2];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_implicit_logout {
+	struct ibmvfc_mad_common common;
+	u64 old_scsi_id;
+	u64 reserved[2];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_tmf {
+	struct ibmvfc_mad_common common;
+	u64 scsi_id;
+	struct scsi_lun lun;
+	u32 flags;
+#define IBMVFC_TMF_ABORT_TASK		0x02
+#define IBMVFC_TMF_ABORT_TASK_SET	0x04
+#define IBMVFC_TMF_LUN_RESET		0x10
+#define IBMVFC_TMF_TGT_RESET		0x20
+#define IBMVFC_TMF_LUA_VALID		0x40
+	u32 cancel_key;
+	u32 my_cancel_key;
+#define IBMVFC_TMF_CANCEL_KEY		0x80000000
+	u32 pad;
+	u64 reserved[2];
+}__attribute__((packed, aligned (8)));
+
+enum ibmvfc_fcp_rsp_info_codes {
+	RSP_NO_FAILURE		= 0x00,
+	RSP_TMF_REJECTED		= 0x04,
+	RSP_TMF_FAILED		= 0x05,
+	RSP_TMF_INVALID_LUN	= 0x09,
+};
+
+struct ibmvfc_fcp_rsp_info {
+	u16 reserved;
+	u8 rsp_code;
+	u8 reserved2[4];
+}__attribute__((packed, aligned (2)));
+
+enum ibmvfc_fcp_rsp_flags {
+	FCP_BIDI_RSP			= 0x80,
+	FCP_BIDI_READ_RESID_UNDER	= 0x40,
+	FCP_BIDI_READ_RESID_OVER	= 0x20,
+	FCP_CONF_REQ			= 0x10,
+	FCP_RESID_UNDER			= 0x08,
+	FCP_RESID_OVER			= 0x04,
+	FCP_SNS_LEN_VALID			= 0x02,
+	FCP_RSP_LEN_VALID			= 0x01,
+};
+
+union ibmvfc_fcp_rsp_data {
+	struct ibmvfc_fcp_rsp_info info;
+	u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_fcp_rsp {
+	u64 reserved;
+	u16 retry_delay_timer;
+	u8 flags;
+	u8 scsi_status;
+	u32 fcp_resid;
+	u32 fcp_sense_len;
+	u32 fcp_rsp_len;
+	union ibmvfc_fcp_rsp_data data;
+}__attribute__((packed, aligned (8)));
+
+enum ibmvfc_cmd_flags {
+	IBMVFC_SCATTERLIST	= 0x0001,
+	IBMVFC_NO_MEM_DESC	= 0x0002,
+	IBMVFC_READ			= 0x0004,
+	IBMVFC_WRITE		= 0x0008,
+	IBMVFC_TMF			= 0x0080,
+	IBMVFC_CLASS_3_ERR	= 0x0100,
+};
+
+enum ibmvfc_fc_task_attr {
+	IBMVFC_SIMPLE_TASK	= 0x00,
+	IBMVFC_HEAD_OF_QUEUE	= 0x01,
+	IBMVFC_ORDERED_TASK	= 0x02,
+	IBMVFC_ACA_TASK		= 0x04,
+};
+
+enum ibmvfc_fc_tmf_flags {
+	IBMVFC_ABORT_TASK_SET	= 0x02,
+	IBMVFC_LUN_RESET		= 0x10,
+	IBMVFC_TARGET_RESET	= 0x20,
+};
+
+struct ibmvfc_fcp_cmd_iu {
+	struct scsi_lun lun;
+	u8 crn;
+	u8 pri_task_attr;
+	u8 tmf_flags;
+	u8 add_cdb_len;
+#define IBMVFC_RDDATA		0x02
+#define IBMVFC_WRDATA		0x01
+	u8 cdb[IBMVFC_MAX_CDB_LEN];
+	u32 xfer_len;
+}__attribute__((packed, aligned (4)));
+
+struct ibmvfc_cmd {
+	u64 task_tag;
+	u32 frame_type;
+	u32 payload_len;
+	u32 resp_len;
+	u32 adapter_resid;
+	u16 status;
+	u16 error;
+	u16 flags;
+	u16 response_flags;
+#define IBMVFC_ADAPTER_RESID_VALID	0x01
+	u32 cancel_key;
+	u32 exchange_id;
+	struct srp_direct_buf ext_func;
+	struct srp_direct_buf ioba;
+	struct srp_direct_buf resp;
+	u64 correlation;
+	u64 tgt_scsi_id;
+	u64 tag;
+	u64 reserved3[2];
+	struct ibmvfc_fcp_cmd_iu iu;
+	struct ibmvfc_fcp_rsp rsp;
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_trace_start_entry {
+	u32 xfer_len;
+}__attribute__((packed));
+
+struct ibmvfc_trace_end_entry {
+	u16 status;
+	u16 error;
+	u8 fcp_rsp_flags;
+	u8 rsp_code;
+	u8 scsi_status;
+	u8 reserved;
+}__attribute__((packed));
+
+struct ibmvfc_trace_entry {
+	struct ibmvfc_event *evt;
+	u32 time;
+	u32 scsi_id;
+	u32 lun;
+	u8 fmt;
+	u8 op_code;
+	u8 tmf_flags;
+	u8 type;
+#define IBMVFC_TRC_START	0x00
+#define IBMVFC_TRC_END		0xff
+	union {
+		struct ibmvfc_trace_start_entry start;
+		struct ibmvfc_trace_end_entry end;
+	} u;
+}__attribute__((packed, aligned (8)));
+
+enum ibmvfc_crq_formats {
+	IBMVFC_CMD_FORMAT		= 0x01,
+	IBMVFC_ASYNC_EVENT	= 0x02,
+	IBMVFC_MAD_FORMAT		= 0x04,
+};
+
+enum ibmvfc_async_event {
+	IBMVFC_AE_ELS_PLOGI		= 0x0001,
+	IBMVFC_AE_ELS_LOGO		= 0x0002,
+	IBMVFC_AE_ELS_PRLO		= 0x0004,
+	IBMVFC_AE_SCN_NPORT		= 0x0008,
+	IBMVFC_AE_SCN_GROUP		= 0x0010,
+	IBMVFC_AE_SCN_DOMAIN		= 0x0020,
+	IBMVFC_AE_SCN_FABRIC		= 0x0040,
+	IBMVFC_AE_LINK_UP			= 0x0080,
+	IBMVFC_AE_LINK_DOWN		= 0x0100,
+	IBMVFC_AE_LINK_DEAD		= 0x0200,
+	IBMVFC_AE_HALT			= 0x0400,
+	IBMVFC_AE_RESUME			= 0x0800,
+	IBMVFC_AE_ADAPTER_FAILED	= 0x1000,
+};
+
+struct ibmvfc_crq {
+	u8 valid;
+	u8 format;
+	u8 reserved[6];
+	u64 ioba;
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_crq_queue {
+	struct ibmvfc_crq *msgs;
+	int size, cur;
+	dma_addr_t msg_token;
+};
+
+struct ibmvfc_async_crq {
+	u8 valid;
+	u8 pad[3];
+	u32 pad2;
+	u64 event;
+	u64 scsi_id;
+	u64 wwpn;
+	u64 node_name;
+	u64 reserved;
+}__attribute__((packed, aligned (8)));
+
+struct ibmvfc_async_crq_queue {
+	struct ibmvfc_async_crq *msgs;
+	int size, cur;
+	dma_addr_t msg_token;
+};
+
+union ibmvfc_iu {
+	struct ibmvfc_mad_common mad_common;
+	struct ibmvfc_npiv_login_mad npiv_login;
+	struct ibmvfc_discover_targets discover_targets;
+	struct ibmvfc_port_login plogi;
+	struct ibmvfc_process_login prli;
+	struct ibmvfc_query_tgt query_tgt;
+	struct ibmvfc_implicit_logout implicit_logout;
+	struct ibmvfc_tmf tmf;
+	struct ibmvfc_cmd cmd;
+}__attribute__((packed, aligned (8)));
+
+enum ibmvfc_target_action {
+	IBMVFC_TGT_ACTION_NONE = 0,
+	IBMVFC_TGT_ACTION_INIT,
+	IBMVFC_TGT_ACTION_INIT_WAIT,
+	IBMVFC_TGT_ACTION_ADD_RPORT,
+	IBMVFC_TGT_ACTION_DEL_RPORT,
+};
+
+struct ibmvfc_target {
+	struct list_head queue;
+	struct ibmvfc_host *vhost;
+	u64 scsi_id;
+	u64 new_scsi_id;
+	struct fc_rport *rport;
+	int target_id;
+	enum ibmvfc_target_action action;
+	int need_login;
+	int init_retries;
+	struct ibmvfc_service_parms service_parms;
+	struct ibmvfc_service_parms service_parms_change;
+	struct fc_rport_identifiers ids;
+	void (*job_step) (struct ibmvfc_target *);
+	struct kref kref;
+};
+
+/* a unit of work for the hosting partition */
+struct ibmvfc_event {
+	struct list_head queue;
+	struct ibmvfc_host *vhost;
+	struct ibmvfc_target *tgt;
+	struct scsi_cmnd *cmnd;
+	atomic_t free;
+	union ibmvfc_iu *xfer_iu;
+	void (*done) (struct ibmvfc_event *);
+	struct ibmvfc_crq crq;
+	union ibmvfc_iu iu;
+	union ibmvfc_iu *sync_iu;
+	struct srp_direct_buf *ext_list;
+	dma_addr_t ext_list_token;
+	struct completion comp;
+	struct timer_list timer;
+};
+
+/* a pool of event structs for use */
+struct ibmvfc_event_pool {
+	struct ibmvfc_event *events;
+	u32 size;
+	union ibmvfc_iu *iu_storage;
+	dma_addr_t iu_token;
+};
+
+enum ibmvfc_host_action {
+	IBMVFC_HOST_ACTION_NONE = 0,
+	IBMVFC_HOST_ACTION_INIT,
+	IBMVFC_HOST_ACTION_INIT_WAIT,
+	IBMVFC_HOST_ACTION_QUERY,
+	IBMVFC_HOST_ACTION_QUERY_TGTS,
+	IBMVFC_HOST_ACTION_TGT_DEL,
+	IBMVFC_HOST_ACTION_ALLOC_TGTS,
+	IBMVFC_HOST_ACTION_TGT_INIT,
+	IBMVFC_HOST_ACTION_TGT_ADD,
+};
+
+enum ibmvfc_host_state {
+	IBMVFC_NO_CRQ = 0,
+	IBMVFC_INITIALIZING,
+	IBMVFC_ACTIVE,
+	IBMVFC_HALTED,
+	IBMVFC_LINK_DOWN,
+	IBMVFC_LINK_DEAD,
+	IBMVFC_HOST_OFFLINE,
+};
+
+struct ibmvfc_host {
+	char name[8];
+	struct list_head queue;
+	struct Scsi_Host *host;
+	enum ibmvfc_host_state state;
+	enum ibmvfc_host_action action;
+#define IBMVFC_NUM_TRACE_INDEX_BITS		8
+#define IBMVFC_NUM_TRACE_ENTRIES		(1 << IBMVFC_NUM_TRACE_INDEX_BITS)
+#define IBMVFC_TRACE_SIZE	(sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
+	struct ibmvfc_trace_entry *trace;
+	u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS;
+	int num_targets;
+	struct list_head targets;
+	struct list_head sent;
+	struct list_head free;
+	struct device *dev;
+	struct ibmvfc_event_pool pool;
+	struct dma_pool *sg_pool;
+	mempool_t *tgt_pool;
+	struct ibmvfc_crq_queue crq;
+	struct ibmvfc_async_crq_queue async_crq;
+	struct ibmvfc_npiv_login login_info;
+	union ibmvfc_npiv_login_data *login_buf;
+	dma_addr_t login_buf_dma;
+	int disc_buf_sz;
+	int log_level;
+	struct ibmvfc_discover_targets_buf *disc_buf;
+	int task_set;
+	int init_retries;
+	int discovery_threads;
+	int client_migrated;
+	int reinit;
+	int events_to_log;
+#define IBMVFC_AE_LINKUP	0x0001
+#define IBMVFC_AE_LINKDOWN	0x0002
+#define IBMVFC_AE_RSCN		0x0004
+	dma_addr_t disc_buf_dma;
+	unsigned int partition_number;
+	char partition_name[97];
+	void (*job_step) (struct ibmvfc_host *);
+	struct task_struct *work_thread;
+	wait_queue_head_t init_wait_q;
+	wait_queue_head_t work_wait_q;
+};
+
+#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
+
+#define tgt_dbg(t, fmt, ...)			\
+	DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
+
+#define tgt_err(t, fmt, ...)		\
+	dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
+
+#define ibmvfc_dbg(vhost, ...) \
+	DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
+
+#define ibmvfc_log(vhost, level, ...) \
+	do { \
+		if (level >= (vhost)->log_level) \
+			dev_err((vhost)->dev, ##__VA_ARGS__); \
+	} while (0)
+
+#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __FUNCTION__))
+#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __FUNCTION__))
+
+#ifdef CONFIG_SCSI_IBMVFC_TRACE
+#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
+#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
+#else
+#define ibmvfc_create_trace_file(kobj, attr) 0
+#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
+#endif
+
+#endif
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 72b9b2a0eba3..2a2f0094570f 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -64,6 +64,10 @@ MODULE_LICENSE("GPL");
 #define BUG_ON(expr)
 #endif
 
+static struct scsi_transport_template *iscsi_tcp_scsi_transport;
+static struct scsi_host_template iscsi_sht;
+static struct iscsi_transport iscsi_tcp_transport;
+
 static unsigned int iscsi_max_lun = 512;
 module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
 
@@ -494,39 +498,43 @@ iscsi_tcp_data_recv_prep(struct iscsi_tcp_conn *tcp_conn)
  * must be called with session lock
  */
 static void
-iscsi_tcp_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_tcp_cleanup_task(struct iscsi_conn *conn, struct iscsi_task *task)
 {
-	struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+	struct iscsi_tcp_task *tcp_task = task->dd_data;
 	struct iscsi_r2t_info *r2t;
 
-	/* flush ctask's r2t queues */
-	while (__kfifo_get(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*))) {
-		__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
+	/* nothing to do for mgmt tasks */
+	if (!task->sc)
+		return;
+
+	/* flush task's r2t queues */
+	while (__kfifo_get(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*))) {
+		__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
 			    sizeof(void*));
-		debug_scsi("iscsi_tcp_cleanup_ctask pending r2t dropped\n");
+		debug_scsi("iscsi_tcp_cleanup_task pending r2t dropped\n");
 	}
 
-	r2t = tcp_ctask->r2t;
+	r2t = tcp_task->r2t;
 	if (r2t != NULL) {
-		__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
+		__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
 			    sizeof(void*));
-		tcp_ctask->r2t = NULL;
+		tcp_task->r2t = NULL;
 	}
 }
 
 /**
  * iscsi_data_rsp - SCSI Data-In Response processing
  * @conn: iscsi connection
- * @ctask: scsi command task
+ * @task: scsi command task
  **/
 static int
-iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
 {
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
-	struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+	struct iscsi_tcp_task *tcp_task = task->dd_data;
 	struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)tcp_conn->in.hdr;
 	struct iscsi_session *session = conn->session;
-	struct scsi_cmnd *sc = ctask->sc;
+	struct scsi_cmnd *sc = task->sc;
 	int datasn = be32_to_cpu(rhdr->datasn);
 	unsigned total_in_length = scsi_in(sc)->length;
 
@@ -534,18 +542,18 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 	if (tcp_conn->in.datalen == 0)
 		return 0;
 
-	if (tcp_ctask->exp_datasn != datasn) {
-		debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->datasn(%d)\n",
-		          __FUNCTION__, tcp_ctask->exp_datasn, datasn);
+	if (tcp_task->exp_datasn != datasn) {
+		debug_tcp("%s: task->exp_datasn(%d) != rhdr->datasn(%d)\n",
+		          __func__, tcp_task->exp_datasn, datasn);
 		return ISCSI_ERR_DATASN;
 	}
 
-	tcp_ctask->exp_datasn++;
+	tcp_task->exp_datasn++;
 
-	tcp_ctask->data_offset = be32_to_cpu(rhdr->offset);
-	if (tcp_ctask->data_offset + tcp_conn->in.datalen > total_in_length) {
+	tcp_task->data_offset = be32_to_cpu(rhdr->offset);
+	if (tcp_task->data_offset + tcp_conn->in.datalen > total_in_length) {
 		debug_tcp("%s: data_offset(%d) + data_len(%d) > total_length_in(%d)\n",
-		          __FUNCTION__, tcp_ctask->data_offset,
+		          __func__, tcp_task->data_offset,
 		          tcp_conn->in.datalen, total_in_length);
 		return ISCSI_ERR_DATA_OFFSET;
 	}
@@ -574,7 +582,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 /**
  * iscsi_solicit_data_init - initialize first Data-Out
  * @conn: iscsi connection
- * @ctask: scsi command task
+ * @task: scsi command task
  * @r2t: R2T info
  *
  * Notes:
@@ -584,7 +592,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
  *	This function is called with connection lock taken.
  **/
 static void
-iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
+iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_task *task,
 			struct iscsi_r2t_info *r2t)
 {
 	struct iscsi_data *hdr;
@@ -595,8 +603,8 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
 	hdr->datasn = cpu_to_be32(r2t->solicit_datasn);
 	r2t->solicit_datasn++;
 	hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
-	memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
-	hdr->itt = ctask->hdr->itt;
+	memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun));
+	hdr->itt = task->hdr->itt;
 	hdr->exp_statsn = r2t->exp_statsn;
 	hdr->offset = cpu_to_be32(r2t->data_offset);
 	if (r2t->data_length > conn->max_xmit_dlength) {
@@ -616,14 +624,14 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
 /**
  * iscsi_r2t_rsp - iSCSI R2T Response processing
  * @conn: iscsi connection
- * @ctask: scsi command task
+ * @task: scsi command task
  **/
 static int
-iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
 {
 	struct iscsi_r2t_info *r2t;
 	struct iscsi_session *session = conn->session;
-	struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+	struct iscsi_tcp_task *tcp_task = task->dd_data;
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
 	struct iscsi_r2t_rsp *rhdr = (struct iscsi_r2t_rsp *)tcp_conn->in.hdr;
 	int r2tsn = be32_to_cpu(rhdr->r2tsn);
@@ -636,23 +644,23 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 		return ISCSI_ERR_DATALEN;
 	}
 
-	if (tcp_ctask->exp_datasn != r2tsn){
-		debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->r2tsn(%d)\n",
-		          __FUNCTION__, tcp_ctask->exp_datasn, r2tsn);
+	if (tcp_task->exp_datasn != r2tsn){
+		debug_tcp("%s: task->exp_datasn(%d) != rhdr->r2tsn(%d)\n",
+		          __func__, tcp_task->exp_datasn, r2tsn);
 		return ISCSI_ERR_R2TSN;
 	}
 
 	/* fill-in new R2T associated with the task */
 	iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr);
 
-	if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) {
+	if (!task->sc || session->state != ISCSI_STATE_LOGGED_IN) {
 		iscsi_conn_printk(KERN_INFO, conn,
 				  "dropping R2T itt %d in recovery.\n",
-				  ctask->itt);
+				  task->itt);
 		return 0;
 	}
 
-	rc = __kfifo_get(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*));
+	rc = __kfifo_get(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*));
 	BUG_ON(!rc);
 
 	r2t->exp_statsn = rhdr->statsn;
@@ -660,7 +668,7 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 	if (r2t->data_length == 0) {
 		iscsi_conn_printk(KERN_ERR, conn,
 				  "invalid R2T with zero data len\n");
-		__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
+		__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
 			    sizeof(void*));
 		return ISCSI_ERR_DATALEN;
 	}
@@ -671,12 +679,12 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 			    r2t->data_length, session->max_burst);
 
 	r2t->data_offset = be32_to_cpu(rhdr->data_offset);
-	if (r2t->data_offset + r2t->data_length > scsi_out(ctask->sc)->length) {
+	if (r2t->data_offset + r2t->data_length > scsi_out(task->sc)->length) {
 		iscsi_conn_printk(KERN_ERR, conn,
 				  "invalid R2T with data len %u at offset %u "
 				  "and total length %d\n", r2t->data_length,
-				  r2t->data_offset, scsi_out(ctask->sc)->length);
-		__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
+				  r2t->data_offset, scsi_out(task->sc)->length);
+		__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
 			    sizeof(void*));
 		return ISCSI_ERR_DATALEN;
 	}
@@ -684,13 +692,13 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 	r2t->ttt = rhdr->ttt; /* no flip */
 	r2t->solicit_datasn = 0;
 
-	iscsi_solicit_data_init(conn, ctask, r2t);
+	iscsi_solicit_data_init(conn, task, r2t);
 
-	tcp_ctask->exp_datasn = r2tsn + 1;
-	__kfifo_put(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*));
+	tcp_task->exp_datasn = r2tsn + 1;
+	__kfifo_put(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*));
 	conn->r2t_pdus_cnt++;
 
-	iscsi_requeue_ctask(ctask);
+	iscsi_requeue_task(task);
 	return 0;
 }
 
@@ -733,10 +741,8 @@ static int
 iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 {
 	int rc = 0, opcode, ahslen;
-	struct iscsi_session *session = conn->session;
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
-	struct iscsi_cmd_task *ctask;
-	uint32_t itt;
+	struct iscsi_task *task;
 
 	/* verify PDU length */
 	tcp_conn->in.datalen = ntoh24(hdr->dlength);
@@ -754,7 +760,7 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 
 	opcode = hdr->opcode & ISCSI_OPCODE_MASK;
 	/* verify itt (itt encoding: age+cid+itt) */
-	rc = iscsi_verify_itt(conn, hdr, &itt);
+	rc = iscsi_verify_itt(conn, hdr->itt);
 	if (rc)
 		return rc;
 
@@ -763,16 +769,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 
 	switch(opcode) {
 	case ISCSI_OP_SCSI_DATA_IN:
-		ctask = session->cmds[itt];
 		spin_lock(&conn->session->lock);
-		rc = iscsi_data_rsp(conn, ctask);
-		spin_unlock(&conn->session->lock);
-		if (rc)
-			return rc;
+		task = iscsi_itt_to_ctask(conn, hdr->itt);
+		if (!task)
+			rc = ISCSI_ERR_BAD_ITT;
+		else
+			rc = iscsi_data_rsp(conn, task);
+		if (rc) {
+			spin_unlock(&conn->session->lock);
+			break;
+		}
+
 		if (tcp_conn->in.datalen) {
-			struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+			struct iscsi_tcp_task *tcp_task = task->dd_data;
 			struct hash_desc *rx_hash = NULL;
-			struct scsi_data_buffer *sdb = scsi_in(ctask->sc);
+			struct scsi_data_buffer *sdb = scsi_in(task->sc);
 
 			/*
 			 * Setup copy of Data-In into the Scsi_Cmnd
@@ -787,17 +798,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 
 			debug_tcp("iscsi_tcp_begin_data_in(%p, offset=%d, "
 				  "datalen=%d)\n", tcp_conn,
-				  tcp_ctask->data_offset,
+				  tcp_task->data_offset,
 				  tcp_conn->in.datalen);
-			return iscsi_segment_seek_sg(&tcp_conn->in.segment,
-						     sdb->table.sgl,
-						     sdb->table.nents,
-						     tcp_ctask->data_offset,
-						     tcp_conn->in.datalen,
-						     iscsi_tcp_process_data_in,
-						     rx_hash);
+			rc = iscsi_segment_seek_sg(&tcp_conn->in.segment,
+						   sdb->table.sgl,
+						   sdb->table.nents,
+						   tcp_task->data_offset,
+						   tcp_conn->in.datalen,
+						   iscsi_tcp_process_data_in,
+						   rx_hash);
+			spin_unlock(&conn->session->lock);
+			return rc;
 		}
-		/* fall through */
+		rc = __iscsi_complete_pdu(conn, hdr, NULL, 0);
+		spin_unlock(&conn->session->lock);
+		break;
 	case ISCSI_OP_SCSI_CMD_RSP:
 		if (tcp_conn->in.datalen) {
 			iscsi_tcp_data_recv_prep(tcp_conn);
@@ -806,15 +821,17 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 		rc = iscsi_complete_pdu(conn, hdr, NULL, 0);
 		break;
 	case ISCSI_OP_R2T:
-		ctask = session->cmds[itt];
-		if (ahslen)
+		spin_lock(&conn->session->lock);
+		task = iscsi_itt_to_ctask(conn, hdr->itt);
+		if (!task)
+			rc = ISCSI_ERR_BAD_ITT;
+		else if (ahslen)
 			rc = ISCSI_ERR_AHSLEN;
-		else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) {
-			spin_lock(&session->lock);
-			rc = iscsi_r2t_rsp(conn, ctask);
-			spin_unlock(&session->lock);
-		} else
+		else if (task->sc->sc_data_direction == DMA_TO_DEVICE)
+			rc = iscsi_r2t_rsp(conn, task);
+		else
 			rc = ISCSI_ERR_PROTO;
+		spin_unlock(&conn->session->lock);
 		break;
 	case ISCSI_OP_LOGIN_RSP:
 	case ISCSI_OP_TEXT_RSP:
@@ -1176,7 +1193,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen)
 {
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
 
-	debug_tcp("%s(%p%s)\n", __FUNCTION__, tcp_conn,
+	debug_tcp("%s(%p%s)\n", __func__, tcp_conn,
 			conn->hdrdgst_en? ", digest enabled" : "");
 
 	/* Clear the data segment - needs to be filled in by the
@@ -1185,7 +1202,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen)
 
 	/* If header digest is enabled, compute the CRC and
 	 * place the digest into the same buffer. We make
-	 * sure that both iscsi_tcp_ctask and mtask have
+	 * sure that both iscsi_tcp_task and mtask have
 	 * sufficient room.
 	 */
 	if (conn->hdrdgst_en) {
@@ -1217,7 +1234,7 @@ iscsi_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg,
 	struct hash_desc *tx_hash = NULL;
 	unsigned int hdr_spec_len;
 
-	debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __FUNCTION__,
+	debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __func__,
 			tcp_conn, offset, len,
 			conn->datadgst_en? ", digest enabled" : "");
 
@@ -1242,7 +1259,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data,
 	struct hash_desc *tx_hash = NULL;
 	unsigned int hdr_spec_len;
 
-	debug_tcp("%s(%p, datalen=%d%s)\n", __FUNCTION__, tcp_conn, len,
+	debug_tcp("%s(%p, datalen=%d%s)\n", __func__, tcp_conn, len,
 		  conn->datadgst_en? ", digest enabled" : "");
 
 	/* Make sure the datalen matches what the caller
@@ -1260,7 +1277,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data,
 /**
  * iscsi_solicit_data_cont - initialize next Data-Out
  * @conn: iscsi connection
- * @ctask: scsi command task
+ * @task: scsi command task
  * @r2t: R2T info
  * @left: bytes left to transfer
  *
@@ -1271,7 +1288,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data,
  *	Called under connection lock.
  **/
 static int
-iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
+iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_task *task,
 			struct iscsi_r2t_info *r2t)
 {
 	struct iscsi_data *hdr;
@@ -1288,8 +1305,8 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
 	hdr->datasn = cpu_to_be32(r2t->solicit_datasn);
 	r2t->solicit_datasn++;
 	hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
-	memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
-	hdr->itt = ctask->hdr->itt;
+	memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun));
+	hdr->itt = task->hdr->itt;
 	hdr->exp_statsn = r2t->exp_statsn;
 	new_offset = r2t->data_offset + r2t->sent;
 	hdr->offset = cpu_to_be32(new_offset);
@@ -1307,89 +1324,76 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
 }
 
 /**
- * iscsi_tcp_ctask - Initialize iSCSI SCSI_READ or SCSI_WRITE commands
+ * iscsi_tcp_task - Initialize iSCSI SCSI_READ or SCSI_WRITE commands
  * @conn: iscsi connection
- * @ctask: scsi command task
+ * @task: scsi command task
  * @sc: scsi command
  **/
 static int
-iscsi_tcp_ctask_init(struct iscsi_cmd_task *ctask)
+iscsi_tcp_task_init(struct iscsi_task *task)
 {
-	struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
-	struct iscsi_conn *conn = ctask->conn;
-	struct scsi_cmnd *sc = ctask->sc;
+	struct iscsi_tcp_task *tcp_task = task->dd_data;
+	struct iscsi_conn *conn = task->conn;
+	struct scsi_cmnd *sc = task->sc;
 	int err;
 
-	BUG_ON(__kfifo_len(tcp_ctask->r2tqueue));
-	tcp_ctask->sent = 0;
-	tcp_ctask->exp_datasn = 0;
+	if (!sc) {
+		/*
+		 * mgmt tasks do not have a scatterlist since they come
+		 * in from the iscsi interface.
+		 */
+		debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id,
+			   task->itt);
+
+		/* Prepare PDU, optionally w/ immediate data */
+		iscsi_tcp_send_hdr_prep(conn, task->hdr, sizeof(*task->hdr));
+
+		/* If we have immediate data, attach a payload */
+		if (task->data_count)
+			iscsi_tcp_send_linear_data_prepare(conn, task->data,
+							   task->data_count);
+		return 0;
+	}
+
+	BUG_ON(__kfifo_len(tcp_task->r2tqueue));
+	tcp_task->sent = 0;
+	tcp_task->exp_datasn = 0;
 
 	/* Prepare PDU, optionally w/ immediate data */
-	debug_scsi("ctask deq [cid %d itt 0x%x imm %d unsol %d]\n",
-		    conn->id, ctask->itt, ctask->imm_count,
-		    ctask->unsol_count);
-	iscsi_tcp_send_hdr_prep(conn, ctask->hdr, ctask->hdr_len);
+	debug_scsi("task deq [cid %d itt 0x%x imm %d unsol %d]\n",
+		    conn->id, task->itt, task->imm_count,
+		    task->unsol_count);
+	iscsi_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len);
 
-	if (!ctask->imm_count)
+	if (!task->imm_count)
 		return 0;
 
 	/* If we have immediate data, attach a payload */
 	err = iscsi_tcp_send_data_prep(conn, scsi_out(sc)->table.sgl,
 				       scsi_out(sc)->table.nents,
-				       0, ctask->imm_count);
+				       0, task->imm_count);
 	if (err)
 		return err;
-	tcp_ctask->sent += ctask->imm_count;
-	ctask->imm_count = 0;
-	return 0;
-}
-
-/**
- * iscsi_tcp_mtask_xmit - xmit management(immediate) task
- * @conn: iscsi connection
- * @mtask: task management task
- *
- * Notes:
- *	The function can return -EAGAIN in which case caller must
- *	call it again later, or recover. '0' return code means successful
- *	xmit.
- **/
-static int
-iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
-{
-	int rc;
-
-	/* Flush any pending data first. */
-	rc = iscsi_tcp_flush(conn);
-	if (rc < 0)
-		return rc;
-
-	if (mtask->hdr->itt == RESERVED_ITT) {
-		struct iscsi_session *session = conn->session;
-
-		spin_lock_bh(&session->lock);
-		iscsi_free_mgmt_task(conn, mtask);
-		spin_unlock_bh(&session->lock);
-	}
-
+	tcp_task->sent += task->imm_count;
+	task->imm_count = 0;
 	return 0;
 }
 
 /*
- * iscsi_tcp_ctask_xmit - xmit normal PDU task
- * @conn: iscsi connection
- * @ctask: iscsi command task
+ * iscsi_tcp_task_xmit - xmit normal PDU task
+ * @task: iscsi command task
  *
  * We're expected to return 0 when everything was transmitted succesfully,
  * -EAGAIN if there's still data in the queue, or != 0 for any other kind
  * of error.
  */
 static int
-iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
+iscsi_tcp_task_xmit(struct iscsi_task *task)
 {
-	struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
-	struct scsi_cmnd *sc = ctask->sc;
-	struct scsi_data_buffer *sdb = scsi_out(sc);
+	struct iscsi_conn *conn = task->conn;
+	struct iscsi_tcp_task *tcp_task = task->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+	struct scsi_data_buffer *sdb;
 	int rc = 0;
 
 flush:
@@ -1398,31 +1402,39 @@ flush:
 	if (rc < 0)
 		return rc;
 
+	/* mgmt command */
+	if (!sc) {
+		if (task->hdr->itt == RESERVED_ITT)
+			iscsi_put_task(task);
+		return 0;
+	}
+
 	/* Are we done already? */
 	if (sc->sc_data_direction != DMA_TO_DEVICE)
 		return 0;
 
-	if (ctask->unsol_count != 0) {
-		struct iscsi_data *hdr = &tcp_ctask->unsol_dtask.hdr;
+	sdb = scsi_out(sc);
+	if (task->unsol_count != 0) {
+		struct iscsi_data *hdr = &tcp_task->unsol_dtask.hdr;
 
 		/* Prepare a header for the unsolicited PDU.
 		 * The amount of data we want to send will be
-		 * in ctask->data_count.
+		 * in task->data_count.
 		 * FIXME: return the data count instead.
 		 */
-		iscsi_prep_unsolicit_data_pdu(ctask, hdr);
+		iscsi_prep_unsolicit_data_pdu(task, hdr);
 
 		debug_tcp("unsol dout [itt 0x%x doff %d dlen %d]\n",
-				ctask->itt, tcp_ctask->sent, ctask->data_count);
+				task->itt, tcp_task->sent, task->data_count);
 
 		iscsi_tcp_send_hdr_prep(conn, hdr, sizeof(*hdr));
 		rc = iscsi_tcp_send_data_prep(conn, sdb->table.sgl,
-					      sdb->table.nents, tcp_ctask->sent,
-					      ctask->data_count);
+					      sdb->table.nents, tcp_task->sent,
+					      task->data_count);
 		if (rc)
 			goto fail;
-		tcp_ctask->sent += ctask->data_count;
-		ctask->unsol_count -= ctask->data_count;
+		tcp_task->sent += task->data_count;
+		task->unsol_count -= task->data_count;
 		goto flush;
 	} else {
 		struct iscsi_session *session = conn->session;
@@ -1431,22 +1443,22 @@ flush:
 		/* All unsolicited PDUs sent. Check for solicited PDUs.
 		 */
 		spin_lock_bh(&session->lock);
-		r2t = tcp_ctask->r2t;
+		r2t = tcp_task->r2t;
 		if (r2t != NULL) {
 			/* Continue with this R2T? */
-			if (!iscsi_solicit_data_cont(conn, ctask, r2t)) {
+			if (!iscsi_solicit_data_cont(conn, task, r2t)) {
 				debug_scsi("  done with r2t %p\n", r2t);
 
-				__kfifo_put(tcp_ctask->r2tpool.queue,
+				__kfifo_put(tcp_task->r2tpool.queue,
 					    (void*)&r2t, sizeof(void*));
-				tcp_ctask->r2t = r2t = NULL;
+				tcp_task->r2t = r2t = NULL;
 			}
 		}
 
 		if (r2t == NULL) {
-			__kfifo_get(tcp_ctask->r2tqueue, (void*)&tcp_ctask->r2t,
+			__kfifo_get(tcp_task->r2tqueue, (void*)&tcp_task->r2t,
 				    sizeof(void*));
-			r2t = tcp_ctask->r2t;
+			r2t = tcp_task->r2t;
 		}
 		spin_unlock_bh(&session->lock);
 
@@ -1457,7 +1469,7 @@ flush:
 		}
 
 		debug_scsi("sol dout %p [dsn %d itt 0x%x doff %d dlen %d]\n",
-			r2t, r2t->solicit_datasn - 1, ctask->itt,
+			r2t, r2t->solicit_datasn - 1, task->itt,
 			r2t->data_offset + r2t->sent, r2t->data_count);
 
 		iscsi_tcp_send_hdr_prep(conn, &r2t->dtask.hdr,
@@ -1469,7 +1481,7 @@ flush:
 					      r2t->data_count);
 		if (rc)
 			goto fail;
-		tcp_ctask->sent += r2t->data_count;
+		tcp_task->sent += r2t->data_count;
 		r2t->sent += r2t->data_count;
 		goto flush;
 	}
@@ -1486,7 +1498,7 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
 	struct iscsi_cls_conn *cls_conn;
 	struct iscsi_tcp_conn *tcp_conn;
 
-	cls_conn = iscsi_conn_setup(cls_session, conn_idx);
+	cls_conn = iscsi_conn_setup(cls_session, sizeof(*tcp_conn), conn_idx);
 	if (!cls_conn)
 		return NULL;
 	conn = cls_conn->dd_data;
@@ -1496,18 +1508,14 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
 	 */
 	conn->max_recv_dlength = ISCSI_DEF_MAX_RECV_SEG_LEN;
 
-	tcp_conn = kzalloc(sizeof(*tcp_conn), GFP_KERNEL);
-	if (!tcp_conn)
-		goto tcp_conn_alloc_fail;
-
-	conn->dd_data = tcp_conn;
+	tcp_conn = conn->dd_data;
 	tcp_conn->iscsi_conn = conn;
 
 	tcp_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
 						  CRYPTO_ALG_ASYNC);
 	tcp_conn->tx_hash.flags = 0;
 	if (IS_ERR(tcp_conn->tx_hash.tfm))
-		goto free_tcp_conn;
+		goto free_conn;
 
 	tcp_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
 						  CRYPTO_ALG_ASYNC);
@@ -1519,14 +1527,12 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
 
 free_tx_tfm:
 	crypto_free_hash(tcp_conn->tx_hash.tfm);
-free_tcp_conn:
+free_conn:
 	iscsi_conn_printk(KERN_ERR, conn,
 			  "Could not create connection due to crc32c "
 			  "loading error. Make sure the crc32c "
 			  "module is built as a module or into the "
 			  "kernel\n");
-	kfree(tcp_conn);
-tcp_conn_alloc_fail:
 	iscsi_conn_teardown(cls_conn);
 	return NULL;
 }
@@ -1547,7 +1553,6 @@ iscsi_tcp_release_conn(struct iscsi_conn *conn)
 
 	spin_lock_bh(&session->lock);
 	tcp_conn->sock = NULL;
-	conn->recv_lock = NULL;
 	spin_unlock_bh(&session->lock);
 	sockfd_put(sock);
 }
@@ -1559,20 +1564,32 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
 
 	iscsi_tcp_release_conn(conn);
-	iscsi_conn_teardown(cls_conn);
 
 	if (tcp_conn->tx_hash.tfm)
 		crypto_free_hash(tcp_conn->tx_hash.tfm);
 	if (tcp_conn->rx_hash.tfm)
 		crypto_free_hash(tcp_conn->rx_hash.tfm);
 
-	kfree(tcp_conn);
+	iscsi_conn_teardown(cls_conn);
 }
 
 static void
 iscsi_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+
+	/* userspace may have goofed up and not bound us */
+	if (!tcp_conn->sock)
+		return;
+	/*
+	 * Make sure our recv side is stopped.
+	 * Older tools called conn stop before ep_disconnect
+	 * so IO could still be coming in.
+	 */
+	write_lock_bh(&tcp_conn->sock->sk->sk_callback_lock);
+	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+	write_unlock_bh(&tcp_conn->sock->sk->sk_callback_lock);
 
 	iscsi_conn_stop(cls_conn, flag);
 	iscsi_tcp_release_conn(conn);
@@ -1623,6 +1640,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
 		    struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,
 		    int is_leading)
 {
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct iscsi_host *ihost = shost_priv(shost);
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
 	struct sock *sk;
@@ -1646,8 +1665,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
 	if (err)
 		goto free_socket;
 
-	err = iscsi_tcp_get_addr(conn, sock, conn->local_address,
-				&conn->local_port, kernel_getsockname);
+	err = iscsi_tcp_get_addr(conn, sock, ihost->local_address,
+				&ihost->local_port, kernel_getsockname);
 	if (err)
 		goto free_socket;
 
@@ -1664,13 +1683,6 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
 	sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */
 	sk->sk_allocation = GFP_ATOMIC;
 
-	/* FIXME: disable Nagle's algorithm */
-
-	/*
-	 * Intercept TCP callbacks for sendfile like receive
-	 * processing.
-	 */
-	conn->recv_lock = &sk->sk_callback_lock;
 	iscsi_conn_set_callbacks(conn);
 	tcp_conn->sendpage = tcp_conn->sock->ops->sendpage;
 	/*
@@ -1684,21 +1696,6 @@ free_socket:
 	return err;
 }
 
-/* called with host lock */
-static void
-iscsi_tcp_mtask_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
-{
-	debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt);
-
-	/* Prepare PDU, optionally w/ immediate data */
-	iscsi_tcp_send_hdr_prep(conn, mtask->hdr, sizeof(*mtask->hdr));
-
-	/* If we have immediate data, attach a payload */
-	if (mtask->data_count)
-		iscsi_tcp_send_linear_data_prepare(conn, mtask->data,
-						   mtask->data_count);
-}
-
 static int
 iscsi_r2tpool_alloc(struct iscsi_session *session)
 {
@@ -1709,8 +1706,8 @@ iscsi_r2tpool_alloc(struct iscsi_session *session)
 	 * initialize per-task: R2T pool and xmit queue
 	 */
 	for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
-	        struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
-		struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+	        struct iscsi_task *task = session->cmds[cmd_i];
+		struct iscsi_tcp_task *tcp_task = task->dd_data;
 
 		/*
 		 * pre-allocated x4 as much r2ts to handle race when
@@ -1719,16 +1716,16 @@ iscsi_r2tpool_alloc(struct iscsi_session *session)
 		 */
 
 		/* R2T pool */
-		if (iscsi_pool_init(&tcp_ctask->r2tpool, session->max_r2t * 4, NULL,
+		if (iscsi_pool_init(&tcp_task->r2tpool, session->max_r2t * 4, NULL,
 				    sizeof(struct iscsi_r2t_info))) {
 			goto r2t_alloc_fail;
 		}
 
 		/* R2T xmit queue */
-		tcp_ctask->r2tqueue = kfifo_alloc(
+		tcp_task->r2tqueue = kfifo_alloc(
 		      session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL);
-		if (tcp_ctask->r2tqueue == ERR_PTR(-ENOMEM)) {
-			iscsi_pool_free(&tcp_ctask->r2tpool);
+		if (tcp_task->r2tqueue == ERR_PTR(-ENOMEM)) {
+			iscsi_pool_free(&tcp_task->r2tpool);
 			goto r2t_alloc_fail;
 		}
 	}
@@ -1737,11 +1734,11 @@ iscsi_r2tpool_alloc(struct iscsi_session *session)
 
 r2t_alloc_fail:
 	for (i = 0; i < cmd_i; i++) {
-		struct iscsi_cmd_task *ctask = session->cmds[i];
-		struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+		struct iscsi_task *task = session->cmds[i];
+		struct iscsi_tcp_task *tcp_task = task->dd_data;
 
-		kfifo_free(tcp_ctask->r2tqueue);
-		iscsi_pool_free(&tcp_ctask->r2tpool);
+		kfifo_free(tcp_task->r2tqueue);
+		iscsi_pool_free(&tcp_task->r2tpool);
 	}
 	return -ENOMEM;
 }
@@ -1752,11 +1749,11 @@ iscsi_r2tpool_free(struct iscsi_session *session)
 	int i;
 
 	for (i = 0; i < session->cmds_max; i++) {
-		struct iscsi_cmd_task *ctask = session->cmds[i];
-		struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
+		struct iscsi_task *task = session->cmds[i];
+		struct iscsi_tcp_task *tcp_task = task->dd_data;
 
-		kfifo_free(tcp_ctask->r2tqueue);
-		iscsi_pool_free(&tcp_ctask->r2tpool);
+		kfifo_free(tcp_task->r2tqueue);
+		iscsi_pool_free(&tcp_task->r2tpool);
 	}
 }
 
@@ -1821,29 +1818,6 @@ iscsi_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn,
 	return len;
 }
 
-static int
-iscsi_tcp_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
-			 char *buf)
-{
-        struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
-	int len;
-
-	switch (param) {
-	case ISCSI_HOST_PARAM_IPADDRESS:
-		spin_lock_bh(&session->lock);
-		if (!session->leadconn)
-			len = -ENODEV;
-		else
-			len = sprintf(buf, "%s\n",
-				     session->leadconn->local_address);
-		spin_unlock_bh(&session->lock);
-		break;
-	default:
-		return iscsi_host_get_param(shost, param, buf);
-	}
-	return len;
-}
-
 static void
 iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats)
 {
@@ -1869,54 +1843,70 @@ iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats)
 }
 
 static struct iscsi_cls_session *
-iscsi_tcp_session_create(struct iscsi_transport *iscsit,
-			 struct scsi_transport_template *scsit,
-			 uint16_t cmds_max, uint16_t qdepth,
-			 uint32_t initial_cmdsn, uint32_t *hostno)
+iscsi_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
+			 uint16_t qdepth, uint32_t initial_cmdsn,
+			 uint32_t *hostno)
 {
 	struct iscsi_cls_session *cls_session;
 	struct iscsi_session *session;
-	uint32_t hn;
+	struct Scsi_Host *shost;
 	int cmd_i;
 
-	cls_session = iscsi_session_setup(iscsit, scsit, cmds_max, qdepth,
-					 sizeof(struct iscsi_tcp_cmd_task),
-					 sizeof(struct iscsi_tcp_mgmt_task),
-					 initial_cmdsn, &hn);
-	if (!cls_session)
+	if (ep) {
+		printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep);
 		return NULL;
-	*hostno = hn;
-
-	session = class_to_transport_session(cls_session);
-	for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
-		struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
-		struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
-
-		ctask->hdr = &tcp_ctask->hdr.cmd_hdr;
-		ctask->hdr_max = sizeof(tcp_ctask->hdr) - ISCSI_DIGEST_SIZE;
 	}
 
-	for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
-		struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i];
-		struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
+	shost = iscsi_host_alloc(&iscsi_sht, 0, qdepth);
+	if (!shost)
+		return NULL;
+	shost->transportt = iscsi_tcp_scsi_transport;
+	shost->max_lun = iscsi_max_lun;
+	shost->max_id = 0;
+	shost->max_channel = 0;
+	shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;
+
+	if (iscsi_host_add(shost, NULL))
+		goto free_host;
+	*hostno = shost->host_no;
+
+	cls_session = iscsi_session_setup(&iscsi_tcp_transport, shost, cmds_max,
+					  sizeof(struct iscsi_tcp_task),
+					  initial_cmdsn, 0);
+	if (!cls_session)
+		goto remove_host;
+	session = cls_session->dd_data;
+
+	shost->can_queue = session->scsi_cmds_max;
+	for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
+		struct iscsi_task *task = session->cmds[cmd_i];
+		struct iscsi_tcp_task *tcp_task = task->dd_data;
 
-		mtask->hdr = (struct iscsi_hdr *) &tcp_mtask->hdr;
+		task->hdr = &tcp_task->hdr.cmd_hdr;
+		task->hdr_max = sizeof(tcp_task->hdr) - ISCSI_DIGEST_SIZE;
 	}
 
-	if (iscsi_r2tpool_alloc(class_to_transport_session(cls_session)))
-		goto r2tpool_alloc_fail;
-
+	if (iscsi_r2tpool_alloc(session))
+		goto remove_session;
 	return cls_session;
 
-r2tpool_alloc_fail:
+remove_session:
 	iscsi_session_teardown(cls_session);
+remove_host:
+	iscsi_host_remove(shost);
+free_host:
+	iscsi_host_free(shost);
 	return NULL;
 }
 
 static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session)
 {
-	iscsi_r2tpool_free(class_to_transport_session(cls_session));
-	iscsi_session_teardown(cls_session);
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+
+	iscsi_r2tpool_free(cls_session->dd_data);
+
+	iscsi_host_remove(shost);
+	iscsi_host_free(shost);
 }
 
 static int iscsi_tcp_slave_configure(struct scsi_device *sdev)
@@ -1971,14 +1961,11 @@ static struct iscsi_transport iscsi_tcp_transport = {
 				  ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
 				  ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
 				  ISCSI_LU_RESET_TMO |
-				  ISCSI_PING_TMO | ISCSI_RECV_TMO,
+				  ISCSI_PING_TMO | ISCSI_RECV_TMO |
+				  ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
 	.host_param_mask	= ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
 				  ISCSI_HOST_INITIATOR_NAME |
 				  ISCSI_HOST_NETDEV_NAME,
-	.host_template		= &iscsi_sht,
-	.conndata_size		= sizeof(struct iscsi_conn),
-	.max_conn		= 1,
-	.max_cmd_len		= 16,
 	/* session management */
 	.create_session		= iscsi_tcp_session_create,
 	.destroy_session	= iscsi_tcp_session_destroy,
@@ -1992,16 +1979,14 @@ static struct iscsi_transport iscsi_tcp_transport = {
 	.start_conn		= iscsi_conn_start,
 	.stop_conn		= iscsi_tcp_conn_stop,
 	/* iscsi host params */
-	.get_host_param		= iscsi_tcp_host_get_param,
+	.get_host_param		= iscsi_host_get_param,
 	.set_host_param		= iscsi_host_set_param,
 	/* IO */
 	.send_pdu		= iscsi_conn_send_pdu,
 	.get_stats		= iscsi_conn_get_stats,
-	.init_cmd_task		= iscsi_tcp_ctask_init,
-	.init_mgmt_task		= iscsi_tcp_mtask_init,
-	.xmit_cmd_task		= iscsi_tcp_ctask_xmit,
-	.xmit_mgmt_task		= iscsi_tcp_mtask_xmit,
-	.cleanup_cmd_task	= iscsi_tcp_cleanup_ctask,
+	.init_task		= iscsi_tcp_task_init,
+	.xmit_task		= iscsi_tcp_task_xmit,
+	.cleanup_task		= iscsi_tcp_cleanup_task,
 	/* recovery */
 	.session_recovery_timedout = iscsi_session_recovery_timedout,
 };
@@ -2014,9 +1999,10 @@ iscsi_tcp_init(void)
 		       iscsi_max_lun);
 		return -EINVAL;
 	}
-	iscsi_tcp_transport.max_lun = iscsi_max_lun;
 
-	if (!iscsi_register_transport(&iscsi_tcp_transport))
+	iscsi_tcp_scsi_transport = iscsi_register_transport(
+							&iscsi_tcp_transport);
+	if (!iscsi_tcp_scsi_transport)
 		return -ENODEV;
 
 	return 0;
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index ed0b991d1e72..498d8ca39848 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -103,11 +103,6 @@ struct iscsi_data_task {
 	char			hdrext[ISCSI_DIGEST_SIZE];/* Header-Digest */
 };
 
-struct iscsi_tcp_mgmt_task {
-	struct iscsi_hdr	hdr;
-	char			hdrext[ISCSI_DIGEST_SIZE]; /* Header-Digest */
-};
-
 struct iscsi_r2t_info {
 	__be32			ttt;		/* copied from R2T */
 	__be32			exp_statsn;	/* copied from R2T */
@@ -119,7 +114,7 @@ struct iscsi_r2t_info {
 	struct iscsi_data_task	dtask;		/* Data-Out header buf */
 };
 
-struct iscsi_tcp_cmd_task {
+struct iscsi_tcp_task {
 	struct iscsi_hdr_buff {
 		struct iscsi_cmd	cmd_hdr;
 		char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index b43bf1d60dac..299e075a7b34 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -38,14 +38,6 @@
 #include <scsi/scsi_transport_iscsi.h>
 #include <scsi/libiscsi.h>
 
-struct iscsi_session *
-class_to_transport_session(struct iscsi_cls_session *cls_session)
-{
-	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
-	return iscsi_hostdata(shost->hostdata);
-}
-EXPORT_SYMBOL_GPL(class_to_transport_session);
-
 /* Serial Number Arithmetic, 32 bits, less than, RFC1982 */
 #define SNA32_CHECK 2147483648UL
 
@@ -87,68 +79,70 @@ iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
 		 * xmit thread
 		 */
 		if (!list_empty(&session->leadconn->xmitqueue) ||
-		    !list_empty(&session->leadconn->mgmtqueue))
-			scsi_queue_work(session->host,
-					&session->leadconn->xmitwork);
+		    !list_empty(&session->leadconn->mgmtqueue)) {
+			if (!(session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+				scsi_queue_work(session->host,
+						&session->leadconn->xmitwork);
+		}
 	}
 }
 EXPORT_SYMBOL_GPL(iscsi_update_cmdsn);
 
-void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *ctask,
+void iscsi_prep_unsolicit_data_pdu(struct iscsi_task *task,
 				   struct iscsi_data *hdr)
 {
-	struct iscsi_conn *conn = ctask->conn;
+	struct iscsi_conn *conn = task->conn;
 
 	memset(hdr, 0, sizeof(struct iscsi_data));
 	hdr->ttt = cpu_to_be32(ISCSI_RESERVED_TAG);
-	hdr->datasn = cpu_to_be32(ctask->unsol_datasn);
-	ctask->unsol_datasn++;
+	hdr->datasn = cpu_to_be32(task->unsol_datasn);
+	task->unsol_datasn++;
 	hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
-	memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
+	memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun));
 
-	hdr->itt = ctask->hdr->itt;
+	hdr->itt = task->hdr->itt;
 	hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
-	hdr->offset = cpu_to_be32(ctask->unsol_offset);
+	hdr->offset = cpu_to_be32(task->unsol_offset);
 
-	if (ctask->unsol_count > conn->max_xmit_dlength) {
+	if (task->unsol_count > conn->max_xmit_dlength) {
 		hton24(hdr->dlength, conn->max_xmit_dlength);
-		ctask->data_count = conn->max_xmit_dlength;
-		ctask->unsol_offset += ctask->data_count;
+		task->data_count = conn->max_xmit_dlength;
+		task->unsol_offset += task->data_count;
 		hdr->flags = 0;
 	} else {
-		hton24(hdr->dlength, ctask->unsol_count);
-		ctask->data_count = ctask->unsol_count;
+		hton24(hdr->dlength, task->unsol_count);
+		task->data_count = task->unsol_count;
 		hdr->flags = ISCSI_FLAG_CMD_FINAL;
 	}
 }
 EXPORT_SYMBOL_GPL(iscsi_prep_unsolicit_data_pdu);
 
-static int iscsi_add_hdr(struct iscsi_cmd_task *ctask, unsigned len)
+static int iscsi_add_hdr(struct iscsi_task *task, unsigned len)
 {
-	unsigned exp_len = ctask->hdr_len + len;
+	unsigned exp_len = task->hdr_len + len;
 
-	if (exp_len > ctask->hdr_max) {
+	if (exp_len > task->hdr_max) {
 		WARN_ON(1);
 		return -EINVAL;
 	}
 
 	WARN_ON(len & (ISCSI_PAD_LEN - 1)); /* caller must pad the AHS */
-	ctask->hdr_len = exp_len;
+	task->hdr_len = exp_len;
 	return 0;
 }
 
 /*
  * make an extended cdb AHS
  */
-static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask)
+static int iscsi_prep_ecdb_ahs(struct iscsi_task *task)
 {
-	struct scsi_cmnd *cmd = ctask->sc;
+	struct scsi_cmnd *cmd = task->sc;
 	unsigned rlen, pad_len;
 	unsigned short ahslength;
 	struct iscsi_ecdb_ahdr *ecdb_ahdr;
 	int rc;
 
-	ecdb_ahdr = iscsi_next_hdr(ctask);
+	ecdb_ahdr = iscsi_next_hdr(task);
 	rlen = cmd->cmd_len - ISCSI_CDB_SIZE;
 
 	BUG_ON(rlen > sizeof(ecdb_ahdr->ecdb));
@@ -156,7 +150,7 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask)
 
 	pad_len = iscsi_padding(rlen);
 
-	rc = iscsi_add_hdr(ctask, sizeof(ecdb_ahdr->ahslength) +
+	rc = iscsi_add_hdr(task, sizeof(ecdb_ahdr->ahslength) +
 	                   sizeof(ecdb_ahdr->ahstype) + ahslength + pad_len);
 	if (rc)
 		return rc;
@@ -171,19 +165,19 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask)
 
 	debug_scsi("iscsi_prep_ecdb_ahs: varlen_cdb_len %d "
 		   "rlen %d pad_len %d ahs_length %d iscsi_headers_size %u\n",
-		   cmd->cmd_len, rlen, pad_len, ahslength, ctask->hdr_len);
+		   cmd->cmd_len, rlen, pad_len, ahslength, task->hdr_len);
 
 	return 0;
 }
 
-static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask)
+static int iscsi_prep_bidi_ahs(struct iscsi_task *task)
 {
-	struct scsi_cmnd *sc = ctask->sc;
+	struct scsi_cmnd *sc = task->sc;
 	struct iscsi_rlength_ahdr *rlen_ahdr;
 	int rc;
 
-	rlen_ahdr = iscsi_next_hdr(ctask);
-	rc = iscsi_add_hdr(ctask, sizeof(*rlen_ahdr));
+	rlen_ahdr = iscsi_next_hdr(task);
+	rc = iscsi_add_hdr(task, sizeof(*rlen_ahdr));
 	if (rc)
 		return rc;
 
@@ -203,28 +197,28 @@ static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask)
 
 /**
  * iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu
- * @ctask: iscsi cmd task
+ * @task: iscsi task
  *
  * Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set
  * fields like dlength or final based on how much data it sends
  */
-static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
+static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
 {
-	struct iscsi_conn *conn = ctask->conn;
+	struct iscsi_conn *conn = task->conn;
 	struct iscsi_session *session = conn->session;
-	struct iscsi_cmd *hdr = ctask->hdr;
-	struct scsi_cmnd *sc = ctask->sc;
+	struct iscsi_cmd *hdr = task->hdr;
+	struct scsi_cmnd *sc = task->sc;
 	unsigned hdrlength, cmd_len;
 	int rc;
 
-	ctask->hdr_len = 0;
-	rc = iscsi_add_hdr(ctask, sizeof(*hdr));
+	task->hdr_len = 0;
+	rc = iscsi_add_hdr(task, sizeof(*hdr));
 	if (rc)
 		return rc;
 	hdr->opcode = ISCSI_OP_SCSI_CMD;
 	hdr->flags = ISCSI_ATTR_SIMPLE;
 	int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
-	hdr->itt = build_itt(ctask->itt, session->age);
+	hdr->itt = build_itt(task->itt, session->age);
 	hdr->cmdsn = cpu_to_be32(session->cmdsn);
 	session->cmdsn++;
 	hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
@@ -232,17 +226,17 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
 	if (cmd_len < ISCSI_CDB_SIZE)
 		memset(&hdr->cdb[cmd_len], 0, ISCSI_CDB_SIZE - cmd_len);
 	else if (cmd_len > ISCSI_CDB_SIZE) {
-		rc = iscsi_prep_ecdb_ahs(ctask);
+		rc = iscsi_prep_ecdb_ahs(task);
 		if (rc)
 			return rc;
 		cmd_len = ISCSI_CDB_SIZE;
 	}
 	memcpy(hdr->cdb, sc->cmnd, cmd_len);
 
-	ctask->imm_count = 0;
+	task->imm_count = 0;
 	if (scsi_bidi_cmnd(sc)) {
 		hdr->flags |= ISCSI_FLAG_CMD_READ;
-		rc = iscsi_prep_bidi_ahs(ctask);
+		rc = iscsi_prep_bidi_ahs(task);
 		if (rc)
 			return rc;
 	}
@@ -264,28 +258,28 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
 		 *
 		 *      pad_count       bytes to be sent as zero-padding
 		 */
-		ctask->unsol_count = 0;
-		ctask->unsol_offset = 0;
-		ctask->unsol_datasn = 0;
+		task->unsol_count = 0;
+		task->unsol_offset = 0;
+		task->unsol_datasn = 0;
 
 		if (session->imm_data_en) {
 			if (out_len >= session->first_burst)
-				ctask->imm_count = min(session->first_burst,
+				task->imm_count = min(session->first_burst,
 							conn->max_xmit_dlength);
 			else
-				ctask->imm_count = min(out_len,
+				task->imm_count = min(out_len,
 							conn->max_xmit_dlength);
-			hton24(hdr->dlength, ctask->imm_count);
+			hton24(hdr->dlength, task->imm_count);
 		} else
 			zero_data(hdr->dlength);
 
 		if (!session->initial_r2t_en) {
-			ctask->unsol_count = min(session->first_burst, out_len)
-							     - ctask->imm_count;
-			ctask->unsol_offset = ctask->imm_count;
+			task->unsol_count = min(session->first_burst, out_len)
+							     - task->imm_count;
+			task->unsol_offset = task->imm_count;
 		}
 
-		if (!ctask->unsol_count)
+		if (!task->unsol_count)
 			/* No unsolicit Data-Out's */
 			hdr->flags |= ISCSI_FLAG_CMD_FINAL;
 	} else {
@@ -298,7 +292,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
 	}
 
 	/* calculate size of additional header segments (AHSs) */
-	hdrlength = ctask->hdr_len - sizeof(*hdr);
+	hdrlength = task->hdr_len - sizeof(*hdr);
 
 	WARN_ON(hdrlength & (ISCSI_PAD_LEN-1));
 	hdrlength /= ISCSI_PAD_LEN;
@@ -306,76 +300,115 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
 	WARN_ON(hdrlength >= 256);
 	hdr->hlength = hdrlength & 0xFF;
 
-	if (conn->session->tt->init_cmd_task(conn->ctask))
-		return EIO;
+	if (conn->session->tt->init_task &&
+	    conn->session->tt->init_task(task))
+		return -EIO;
+
+	task->state = ISCSI_TASK_RUNNING;
+	list_move_tail(&task->running, &conn->run_list);
 
 	conn->scsicmd_pdus_cnt++;
-	debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x "
-		"len %d bidi_len %d cmdsn %d win %d]\n",
-		scsi_bidi_cmnd(sc) ? "bidirectional" :
-		     sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
-		conn->id, sc, sc->cmnd[0], ctask->itt,
-		scsi_bufflen(sc), scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0,
-		session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
+	debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d "
+		   "bidi_len %d cmdsn %d win %d]\n", scsi_bidi_cmnd(sc) ?
+		   "bidirectional" : sc->sc_data_direction == DMA_TO_DEVICE ?
+		   "write" : "read", conn->id, sc, sc->cmnd[0], task->itt,
+		   scsi_bufflen(sc),
+		   scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0,
+		   session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
 	return 0;
 }
 
 /**
- * iscsi_complete_command - return command back to scsi-ml
- * @ctask: iscsi cmd task
+ * iscsi_complete_command - finish a task
+ * @task: iscsi cmd task
  *
  * Must be called with session lock.
- * This function returns the scsi command to scsi-ml and returns
- * the cmd task to the pool of available cmd tasks.
+ * This function returns the scsi command to scsi-ml or cleans
+ * up mgmt tasks then returns the task to the pool.
  */
-static void iscsi_complete_command(struct iscsi_cmd_task *ctask)
+static void iscsi_complete_command(struct iscsi_task *task)
 {
-	struct iscsi_conn *conn = ctask->conn;
+	struct iscsi_conn *conn = task->conn;
 	struct iscsi_session *session = conn->session;
-	struct scsi_cmnd *sc = ctask->sc;
+	struct scsi_cmnd *sc = task->sc;
 
-	ctask->state = ISCSI_TASK_COMPLETED;
-	ctask->sc = NULL;
-	/* SCSI eh reuses commands to verify us */
-	sc->SCp.ptr = NULL;
-	if (conn->ctask == ctask)
-		conn->ctask = NULL;
-	list_del_init(&ctask->running);
-	__kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
-	sc->scsi_done(sc);
+	list_del_init(&task->running);
+	task->state = ISCSI_TASK_COMPLETED;
+	task->sc = NULL;
+
+	if (conn->task == task)
+		conn->task = NULL;
+	/*
+	 * login task is preallocated so do not free
+	 */
+	if (conn->login_task == task)
+		return;
+
+	__kfifo_put(session->cmdpool.queue, (void*)&task, sizeof(void*));
+
+	if (conn->ping_task == task)
+		conn->ping_task = NULL;
+
+	if (sc) {
+		task->sc = NULL;
+		/* SCSI eh reuses commands to verify us */
+		sc->SCp.ptr = NULL;
+		/*
+		 * queue command may call this to free the task, but
+		 * not have setup the sc callback
+		 */
+		if (sc->scsi_done)
+			sc->scsi_done(sc);
+	}
+}
+
+void __iscsi_get_task(struct iscsi_task *task)
+{
+	atomic_inc(&task->refcount);
 }
+EXPORT_SYMBOL_GPL(__iscsi_get_task);
 
-static void __iscsi_get_ctask(struct iscsi_cmd_task *ctask)
+static void __iscsi_put_task(struct iscsi_task *task)
 {
-	atomic_inc(&ctask->refcount);
+	if (atomic_dec_and_test(&task->refcount))
+		iscsi_complete_command(task);
 }
 
-static void __iscsi_put_ctask(struct iscsi_cmd_task *ctask)
+void iscsi_put_task(struct iscsi_task *task)
 {
-	if (atomic_dec_and_test(&ctask->refcount))
-		iscsi_complete_command(ctask);
+	struct iscsi_session *session = task->conn->session;
+
+	spin_lock_bh(&session->lock);
+	__iscsi_put_task(task);
+	spin_unlock_bh(&session->lock);
 }
+EXPORT_SYMBOL_GPL(iscsi_put_task);
 
 /*
  * session lock must be held
  */
-static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
+static void fail_command(struct iscsi_conn *conn, struct iscsi_task *task,
 			 int err)
 {
 	struct scsi_cmnd *sc;
 
-	sc = ctask->sc;
+	sc = task->sc;
 	if (!sc)
 		return;
 
-	if (ctask->state == ISCSI_TASK_PENDING)
+	if (task->state == ISCSI_TASK_PENDING)
 		/*
 		 * cmd never made it to the xmit thread, so we should not count
 		 * the cmd in the sequencing
 		 */
 		conn->session->queued_cmdsn--;
 	else
-		conn->session->tt->cleanup_cmd_task(conn, ctask);
+		conn->session->tt->cleanup_task(conn, task);
+	/*
+	 * Check if cleanup_task dropped the lock and the command completed,
+	 */
+	if (!task->sc)
+		return;
 
 	sc->result = err;
 	if (!scsi_bidi_cmnd(sc))
@@ -384,39 +417,63 @@ static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
 		scsi_out(sc)->resid = scsi_out(sc)->length;
 		scsi_in(sc)->resid = scsi_in(sc)->length;
 	}
-	if (conn->ctask == ctask)
-		conn->ctask = NULL;
+
+	if (conn->task == task)
+		conn->task = NULL;
 	/* release ref from queuecommand */
-	__iscsi_put_ctask(ctask);
+	__iscsi_put_task(task);
 }
 
-/**
- * iscsi_free_mgmt_task - return mgmt task back to pool
- * @conn: iscsi connection
- * @mtask: mtask
- *
- * Must be called with session lock.
- */
-void iscsi_free_mgmt_task(struct iscsi_conn *conn,
-			  struct iscsi_mgmt_task *mtask)
+static int iscsi_prep_mgmt_task(struct iscsi_conn *conn,
+				struct iscsi_task *task)
 {
-	list_del_init(&mtask->running);
-	if (conn->login_mtask == mtask)
-		return;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_hdr *hdr = (struct iscsi_hdr *)task->hdr;
+	struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
+
+	if (conn->session->state == ISCSI_STATE_LOGGING_OUT)
+		return -ENOTCONN;
+
+	if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) &&
+	    hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
+		nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
+	/*
+	 * pre-format CmdSN for outgoing PDU.
+	 */
+	nop->cmdsn = cpu_to_be32(session->cmdsn);
+	if (hdr->itt != RESERVED_ITT) {
+		hdr->itt = build_itt(task->itt, session->age);
+		/*
+		 * TODO: We always use immediate, so we never hit this.
+		 * If we start to send tmfs or nops as non-immediate then
+		 * we should start checking the cmdsn numbers for mgmt tasks.
+		 */
+		if (conn->c_stage == ISCSI_CONN_STARTED &&
+		    !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+			session->queued_cmdsn++;
+			session->cmdsn++;
+		}
+	}
 
-	if (conn->ping_mtask == mtask)
-		conn->ping_mtask = NULL;
-	__kfifo_put(conn->session->mgmtpool.queue,
-		    (void*)&mtask, sizeof(void*));
+	if (session->tt->init_task)
+		session->tt->init_task(task);
+
+	if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT)
+		session->state = ISCSI_STATE_LOGGING_OUT;
+
+	list_move_tail(&task->running, &conn->mgmt_run_list);
+	debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
+		   hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
+		   task->data_count);
+	return 0;
 }
-EXPORT_SYMBOL_GPL(iscsi_free_mgmt_task);
 
-static struct iscsi_mgmt_task *
+static struct iscsi_task *
 __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 		      char *data, uint32_t data_size)
 {
 	struct iscsi_session *session = conn->session;
-	struct iscsi_mgmt_task *mtask;
+	struct iscsi_task *task;
 
 	if (session->state == ISCSI_STATE_TERMINATE)
 		return NULL;
@@ -426,29 +483,56 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 		/*
 		 * Login and Text are sent serially, in
 		 * request-followed-by-response sequence.
-		 * Same mtask can be used. Same ITT must be used.
-		 * Note that login_mtask is preallocated at conn_create().
+		 * Same task can be used. Same ITT must be used.
+		 * Note that login_task is preallocated at conn_create().
 		 */
-		mtask = conn->login_mtask;
+		task = conn->login_task;
 	else {
 		BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
 		BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
 
-		if (!__kfifo_get(session->mgmtpool.queue,
-				 (void*)&mtask, sizeof(void*)))
+		if (!__kfifo_get(session->cmdpool.queue,
+				 (void*)&task, sizeof(void*)))
 			return NULL;
+
+		if ((hdr->opcode == (ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE)) &&
+		     hdr->ttt == RESERVED_ITT) {
+			conn->ping_task = task;
+			conn->last_ping = jiffies;
+		}
 	}
+	/*
+	 * released in complete pdu for task we expect a response for, and
+	 * released by the lld when it has transmitted the task for
+	 * pdus we do not expect a response for.
+	 */
+	atomic_set(&task->refcount, 1);
+	task->conn = conn;
+	task->sc = NULL;
 
 	if (data_size) {
-		memcpy(mtask->data, data, data_size);
-		mtask->data_count = data_size;
+		memcpy(task->data, data, data_size);
+		task->data_count = data_size;
+	} else
+		task->data_count = 0;
+
+	memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr));
+	INIT_LIST_HEAD(&task->running);
+	list_add_tail(&task->running, &conn->mgmtqueue);
+
+	if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+		if (iscsi_prep_mgmt_task(conn, task)) {
+			__iscsi_put_task(task);
+			return NULL;
+		}
+
+		if (session->tt->xmit_task(task))
+			task = NULL;
+
 	} else
-		mtask->data_count = 0;
+		scsi_queue_work(conn->session->host, &conn->xmitwork);
 
-	memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr));
-	INIT_LIST_HEAD(&mtask->running);
-	list_add_tail(&mtask->running, &conn->mgmtqueue);
-	return mtask;
+	return task;
 }
 
 int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
@@ -462,7 +546,6 @@ int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
 	if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size))
 		err = -EPERM;
 	spin_unlock_bh(&session->lock);
-	scsi_queue_work(session->host, &conn->xmitwork);
 	return err;
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
@@ -471,7 +554,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
  * iscsi_cmd_rsp - SCSI Command Response processing
  * @conn: iscsi connection
  * @hdr: iscsi header
- * @ctask: scsi command task
+ * @task: scsi command task
  * @data: cmd data buffer
  * @datalen: len of buffer
  *
@@ -479,12 +562,12 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
  * then completes the command and task.
  **/
 static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
-			       struct iscsi_cmd_task *ctask, char *data,
+			       struct iscsi_task *task, char *data,
 			       int datalen)
 {
 	struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr;
 	struct iscsi_session *session = conn->session;
-	struct scsi_cmnd *sc = ctask->sc;
+	struct scsi_cmnd *sc = task->sc;
 
 	iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr);
 	conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1;
@@ -508,7 +591,7 @@ invalid_datalen:
 			goto out;
 		}
 
-		senselen = be16_to_cpu(get_unaligned((__be16 *) data));
+		senselen = get_unaligned_be16(data);
 		if (datalen < senselen)
 			goto invalid_datalen;
 
@@ -544,10 +627,10 @@ invalid_datalen:
 	}
 out:
 	debug_scsi("done [sc %lx res %d itt 0x%x]\n",
-		   (long)sc, sc->result, ctask->itt);
+		   (long)sc, sc->result, task->itt);
 	conn->scsirsp_pdus_cnt++;
 
-	__iscsi_put_ctask(ctask);
+	__iscsi_put_task(task);
 }
 
 static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
@@ -572,9 +655,9 @@ static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
 {
         struct iscsi_nopout hdr;
-	struct iscsi_mgmt_task *mtask;
+	struct iscsi_task *task;
 
-	if (!rhdr && conn->ping_mtask)
+	if (!rhdr && conn->ping_task)
 		return;
 
 	memset(&hdr, 0, sizeof(struct iscsi_nopout));
@@ -588,18 +671,9 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
 	} else
 		hdr.ttt = RESERVED_ITT;
 
-	mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0);
-	if (!mtask) {
+	task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0);
+	if (!task)
 		iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n");
-		return;
-	}
-
-	/* only track our nops */
-	if (!rhdr) {
-		conn->ping_mtask = mtask;
-		conn->last_ping = jiffies;
-	}
-	scsi_queue_work(conn->session->host, &conn->xmitwork);
 }
 
 static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
@@ -628,6 +702,31 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 }
 
 /**
+ * iscsi_itt_to_task - look up task by itt
+ * @conn: iscsi connection
+ * @itt: itt
+ *
+ * This should be used for mgmt tasks like login and nops, or if
+ * the LDD's itt space does not include the session age.
+ *
+ * The session lock must be held.
+ */
+static struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt)
+{
+	struct iscsi_session *session = conn->session;
+	uint32_t i;
+
+	if (itt == RESERVED_ITT)
+		return NULL;
+
+	i = get_itt(itt);
+	if (i >= session->cmds_max)
+		return NULL;
+
+	return session->cmds[i];
+}
+
+/**
  * __iscsi_complete_pdu - complete pdu
  * @conn: iscsi conn
  * @hdr: iscsi header
@@ -638,108 +737,28 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
  * queuecommand or send generic. session lock must be held and verify
  * itt must have been called.
  */
-static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
-				char *data, int datalen)
+int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+			 char *data, int datalen)
 {
 	struct iscsi_session *session = conn->session;
 	int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0;
-	struct iscsi_cmd_task *ctask;
-	struct iscsi_mgmt_task *mtask;
+	struct iscsi_task *task;
 	uint32_t itt;
 
 	conn->last_recv = jiffies;
+	rc = iscsi_verify_itt(conn, hdr->itt);
+	if (rc)
+		return rc;
+
 	if (hdr->itt != RESERVED_ITT)
 		itt = get_itt(hdr->itt);
 	else
 		itt = ~0U;
 
-	if (itt < session->cmds_max) {
-		ctask = session->cmds[itt];
-
-		debug_scsi("cmdrsp [op 0x%x cid %d itt 0x%x len %d]\n",
-			   opcode, conn->id, ctask->itt, datalen);
-
-		switch(opcode) {
-		case ISCSI_OP_SCSI_CMD_RSP:
-			BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
-			iscsi_scsi_cmd_rsp(conn, hdr, ctask, data,
-					   datalen);
-			break;
-		case ISCSI_OP_SCSI_DATA_IN:
-			BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
-			if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
-				conn->scsirsp_pdus_cnt++;
-				__iscsi_put_ctask(ctask);
-			}
-			break;
-		case ISCSI_OP_R2T:
-			/* LLD handles this for now */
-			break;
-		default:
-			rc = ISCSI_ERR_BAD_OPCODE;
-			break;
-		}
-	} else if (itt >= ISCSI_MGMT_ITT_OFFSET &&
-		   itt < ISCSI_MGMT_ITT_OFFSET + session->mgmtpool_max) {
-		mtask = session->mgmt_cmds[itt - ISCSI_MGMT_ITT_OFFSET];
-
-		debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n",
-			   opcode, conn->id, mtask->itt, datalen);
+	debug_scsi("[op 0x%x cid %d itt 0x%x len %d]\n",
+		   opcode, conn->id, itt, datalen);
 
-		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
-		switch(opcode) {
-		case ISCSI_OP_LOGOUT_RSP:
-			if (datalen) {
-				rc = ISCSI_ERR_PROTO;
-				break;
-			}
-			conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
-			/* fall through */
-		case ISCSI_OP_LOGIN_RSP:
-		case ISCSI_OP_TEXT_RSP:
-			/*
-			 * login related PDU's exp_statsn is handled in
-			 * userspace
-			 */
-			if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
-				rc = ISCSI_ERR_CONN_FAILED;
-			iscsi_free_mgmt_task(conn, mtask);
-			break;
-		case ISCSI_OP_SCSI_TMFUNC_RSP:
-			if (datalen) {
-				rc = ISCSI_ERR_PROTO;
-				break;
-			}
-
-			iscsi_tmf_rsp(conn, hdr);
-			iscsi_free_mgmt_task(conn, mtask);
-			break;
-		case ISCSI_OP_NOOP_IN:
-			if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) ||
-			    datalen) {
-				rc = ISCSI_ERR_PROTO;
-				break;
-			}
-			conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
-
-			if (conn->ping_mtask != mtask) {
-				/*
-				 * If this is not in response to one of our
-				 * nops then it must be from userspace.
-				 */
-				if (iscsi_recv_pdu(conn->cls_conn, hdr, data,
-						   datalen))
-					rc = ISCSI_ERR_CONN_FAILED;
-			} else
-				mod_timer(&conn->transport_timer,
-					  jiffies + conn->recv_timeout);
-			iscsi_free_mgmt_task(conn, mtask);
-			break;
-		default:
-			rc = ISCSI_ERR_BAD_OPCODE;
-			break;
-		}
-	} else if (itt == ~0U) {
+	if (itt == ~0U) {
 		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
 
 		switch(opcode) {
@@ -766,11 +785,104 @@ static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 			rc = ISCSI_ERR_BAD_OPCODE;
 			break;
 		}
-	} else
-		rc = ISCSI_ERR_BAD_ITT;
+		goto out;
+	}
 
+	switch(opcode) {
+	case ISCSI_OP_SCSI_CMD_RSP:
+	case ISCSI_OP_SCSI_DATA_IN:
+		task = iscsi_itt_to_ctask(conn, hdr->itt);
+		if (!task)
+			return ISCSI_ERR_BAD_ITT;
+		break;
+	case ISCSI_OP_R2T:
+		/*
+		 * LLD handles R2Ts if they need to.
+		 */
+		return 0;
+	case ISCSI_OP_LOGOUT_RSP:
+	case ISCSI_OP_LOGIN_RSP:
+	case ISCSI_OP_TEXT_RSP:
+	case ISCSI_OP_SCSI_TMFUNC_RSP:
+	case ISCSI_OP_NOOP_IN:
+		task = iscsi_itt_to_task(conn, hdr->itt);
+		if (!task)
+			return ISCSI_ERR_BAD_ITT;
+		break;
+	default:
+		return ISCSI_ERR_BAD_OPCODE;
+	}
+
+	switch(opcode) {
+	case ISCSI_OP_SCSI_CMD_RSP:
+		iscsi_scsi_cmd_rsp(conn, hdr, task, data, datalen);
+		break;
+	case ISCSI_OP_SCSI_DATA_IN:
+		if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
+			conn->scsirsp_pdus_cnt++;
+			iscsi_update_cmdsn(session,
+					   (struct iscsi_nopin*) hdr);
+			__iscsi_put_task(task);
+		}
+		break;
+	case ISCSI_OP_LOGOUT_RSP:
+		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+		if (datalen) {
+			rc = ISCSI_ERR_PROTO;
+			break;
+		}
+		conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+		goto recv_pdu;
+	case ISCSI_OP_LOGIN_RSP:
+	case ISCSI_OP_TEXT_RSP:
+		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+		/*
+		 * login related PDU's exp_statsn is handled in
+		 * userspace
+		 */
+		goto recv_pdu;
+	case ISCSI_OP_SCSI_TMFUNC_RSP:
+		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+		if (datalen) {
+			rc = ISCSI_ERR_PROTO;
+			break;
+		}
+
+		iscsi_tmf_rsp(conn, hdr);
+		__iscsi_put_task(task);
+		break;
+	case ISCSI_OP_NOOP_IN:
+		iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+		if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) {
+			rc = ISCSI_ERR_PROTO;
+			break;
+		}
+		conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+
+		if (conn->ping_task != task)
+			/*
+			 * If this is not in response to one of our
+			 * nops then it must be from userspace.
+			 */
+			goto recv_pdu;
+
+		mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout);
+		__iscsi_put_task(task);
+		break;
+	default:
+		rc = ISCSI_ERR_BAD_OPCODE;
+		break;
+	}
+
+out:
+	return rc;
+recv_pdu:
+	if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
+		rc = ISCSI_ERR_CONN_FAILED;
+	__iscsi_put_task(task);
 	return rc;
 }
+EXPORT_SYMBOL_GPL(__iscsi_complete_pdu);
 
 int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 		       char *data, int datalen)
@@ -784,51 +896,63 @@ int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
 }
 EXPORT_SYMBOL_GPL(iscsi_complete_pdu);
 
-/* verify itt (itt encoding: age+cid+itt) */
-int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
-		     uint32_t *ret_itt)
+int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt)
 {
 	struct iscsi_session *session = conn->session;
-	struct iscsi_cmd_task *ctask;
-	uint32_t itt;
+	uint32_t i;
 
-	if (hdr->itt != RESERVED_ITT) {
-		if (((__force u32)hdr->itt & ISCSI_AGE_MASK) !=
-		    (session->age << ISCSI_AGE_SHIFT)) {
-			iscsi_conn_printk(KERN_ERR, conn,
-					  "received itt %x expected session "
-					  "age (%x)\n", (__force u32)hdr->itt,
-					  session->age & ISCSI_AGE_MASK);
-			return ISCSI_ERR_BAD_ITT;
-		}
+	if (itt == RESERVED_ITT)
+		return 0;
 
-		itt = get_itt(hdr->itt);
-	} else
-		itt = ~0U;
+	if (((__force u32)itt & ISCSI_AGE_MASK) !=
+	    (session->age << ISCSI_AGE_SHIFT)) {
+		iscsi_conn_printk(KERN_ERR, conn,
+				  "received itt %x expected session age (%x)\n",
+				  (__force u32)itt, session->age);
+		return ISCSI_ERR_BAD_ITT;
+	}
 
-	if (itt < session->cmds_max) {
-		ctask = session->cmds[itt];
+	i = get_itt(itt);
+	if (i >= session->cmds_max) {
+		iscsi_conn_printk(KERN_ERR, conn,
+				  "received invalid itt index %u (max cmds "
+				   "%u.\n", i, session->cmds_max);
+		return ISCSI_ERR_BAD_ITT;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_verify_itt);
 
-		if (!ctask->sc) {
-			iscsi_conn_printk(KERN_INFO, conn, "dropping ctask "
-					  "with itt 0x%x\n", ctask->itt);
-			/* force drop */
-			return ISCSI_ERR_NO_SCSI_CMD;
-		}
+/**
+ * iscsi_itt_to_ctask - look up ctask by itt
+ * @conn: iscsi connection
+ * @itt: itt
+ *
+ * This should be used for cmd tasks.
+ *
+ * The session lock must be held.
+ */
+struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt)
+{
+	struct iscsi_task *task;
 
-		if (ctask->sc->SCp.phase != session->age) {
-			iscsi_conn_printk(KERN_ERR, conn,
-					  "iscsi: ctask's session age %d, "
-					  "expected %d\n", ctask->sc->SCp.phase,
-					  session->age);
-			return ISCSI_ERR_SESSION_FAILED;
-		}
+	if (iscsi_verify_itt(conn, itt))
+		return NULL;
+
+	task = iscsi_itt_to_task(conn, itt);
+	if (!task || !task->sc)
+		return NULL;
+
+	if (task->sc->SCp.phase != conn->session->age) {
+		iscsi_session_printk(KERN_ERR, conn->session,
+				  "task's session age %d, expected %d\n",
+				  task->sc->SCp.phase, conn->session->age);
+		return NULL;
 	}
 
-	*ret_itt = itt;
-	return 0;
+	return task;
 }
-EXPORT_SYMBOL_GPL(iscsi_verify_itt);
+EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask);
 
 void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
 {
@@ -850,61 +974,6 @@ void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_failure);
 
-static void iscsi_prep_mtask(struct iscsi_conn *conn,
-			     struct iscsi_mgmt_task *mtask)
-{
-	struct iscsi_session *session = conn->session;
-	struct iscsi_hdr *hdr = mtask->hdr;
-	struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
-
-	if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) &&
-	    hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
-		nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
-	/*
-	 * pre-format CmdSN for outgoing PDU.
-	 */
-	nop->cmdsn = cpu_to_be32(session->cmdsn);
-	if (hdr->itt != RESERVED_ITT) {
-		hdr->itt = build_itt(mtask->itt, session->age);
-		/*
-		 * TODO: We always use immediate, so we never hit this.
-		 * If we start to send tmfs or nops as non-immediate then
-		 * we should start checking the cmdsn numbers for mgmt tasks.
-		 */
-		if (conn->c_stage == ISCSI_CONN_STARTED &&
-		    !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
-			session->queued_cmdsn++;
-			session->cmdsn++;
-		}
-	}
-
-	if (session->tt->init_mgmt_task)
-		session->tt->init_mgmt_task(conn, mtask);
-
-	debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
-		   hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
-		   mtask->data_count);
-}
-
-static int iscsi_xmit_mtask(struct iscsi_conn *conn)
-{
-	struct iscsi_hdr *hdr = conn->mtask->hdr;
-	int rc;
-
-	if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT)
-		conn->session->state = ISCSI_STATE_LOGGING_OUT;
-	spin_unlock_bh(&conn->session->lock);
-
-	rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask);
-	spin_lock_bh(&conn->session->lock);
-	if (rc)
-		return rc;
-
-	/* done with this in-progress mtask */
-	conn->mtask = NULL;
-	return 0;
-}
-
 static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn)
 {
 	struct iscsi_session *session = conn->session;
@@ -922,37 +991,38 @@ static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn)
 	return 0;
 }
 
-static int iscsi_xmit_ctask(struct iscsi_conn *conn)
+static int iscsi_xmit_task(struct iscsi_conn *conn)
 {
-	struct iscsi_cmd_task *ctask = conn->ctask;
+	struct iscsi_task *task = conn->task;
 	int rc;
 
-	__iscsi_get_ctask(ctask);
+	__iscsi_get_task(task);
 	spin_unlock_bh(&conn->session->lock);
-	rc = conn->session->tt->xmit_cmd_task(conn, ctask);
+	rc = conn->session->tt->xmit_task(task);
 	spin_lock_bh(&conn->session->lock);
-	__iscsi_put_ctask(ctask);
+	__iscsi_put_task(task);
 	if (!rc)
-		/* done with this ctask */
-		conn->ctask = NULL;
+		/* done with this task */
+		conn->task = NULL;
 	return rc;
 }
 
 /**
- * iscsi_requeue_ctask - requeue ctask to run from session workqueue
- * @ctask: ctask to requeue
+ * iscsi_requeue_task - requeue task to run from session workqueue
+ * @task: task to requeue
  *
- * LLDs that need to run a ctask from the session workqueue should call
- * this. The session lock must be held.
+ * LLDs that need to run a task from the session workqueue should call
+ * this. The session lock must be held. This should only be called
+ * by software drivers.
  */
-void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask)
+void iscsi_requeue_task(struct iscsi_task *task)
 {
-	struct iscsi_conn *conn = ctask->conn;
+	struct iscsi_conn *conn = task->conn;
 
-	list_move_tail(&ctask->running, &conn->requeue);
+	list_move_tail(&task->running, &conn->requeue);
 	scsi_queue_work(conn->session->host, &conn->xmitwork);
 }
-EXPORT_SYMBOL_GPL(iscsi_requeue_ctask);
+EXPORT_SYMBOL_GPL(iscsi_requeue_task);
 
 /**
  * iscsi_data_xmit - xmit any command into the scheduled connection
@@ -974,14 +1044,8 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
 		return -ENODATA;
 	}
 
-	if (conn->ctask) {
-		rc = iscsi_xmit_ctask(conn);
-		if (rc)
-			goto again;
-	}
-
-	if (conn->mtask) {
-		rc = iscsi_xmit_mtask(conn);
+	if (conn->task) {
+		rc = iscsi_xmit_task(conn);
 	        if (rc)
 		        goto again;
 	}
@@ -993,17 +1057,14 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
 	 */
 check_mgmt:
 	while (!list_empty(&conn->mgmtqueue)) {
-		conn->mtask = list_entry(conn->mgmtqueue.next,
-					 struct iscsi_mgmt_task, running);
-		if (conn->session->state == ISCSI_STATE_LOGGING_OUT) {
-			iscsi_free_mgmt_task(conn, conn->mtask);
-			conn->mtask = NULL;
+		conn->task = list_entry(conn->mgmtqueue.next,
+					 struct iscsi_task, running);
+		if (iscsi_prep_mgmt_task(conn, conn->task)) {
+			__iscsi_put_task(conn->task);
+			conn->task = NULL;
 			continue;
 		}
-
-		iscsi_prep_mtask(conn, conn->mtask);
-		list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list);
-		rc = iscsi_xmit_mtask(conn);
+		rc = iscsi_xmit_task(conn);
 		if (rc)
 			goto again;
 	}
@@ -1013,24 +1074,21 @@ check_mgmt:
 		if (conn->tmf_state == TMF_QUEUED)
 			break;
 
-		conn->ctask = list_entry(conn->xmitqueue.next,
-					 struct iscsi_cmd_task, running);
+		conn->task = list_entry(conn->xmitqueue.next,
+					 struct iscsi_task, running);
 		if (conn->session->state == ISCSI_STATE_LOGGING_OUT) {
-			fail_command(conn, conn->ctask, DID_IMM_RETRY << 16);
+			fail_command(conn, conn->task, DID_IMM_RETRY << 16);
 			continue;
 		}
-		if (iscsi_prep_scsi_cmd_pdu(conn->ctask)) {
-			fail_command(conn, conn->ctask, DID_ABORT << 16);
+		if (iscsi_prep_scsi_cmd_pdu(conn->task)) {
+			fail_command(conn, conn->task, DID_ABORT << 16);
 			continue;
 		}
-
-		conn->ctask->state = ISCSI_TASK_RUNNING;
-		list_move_tail(conn->xmitqueue.next, &conn->run_list);
-		rc = iscsi_xmit_ctask(conn);
+		rc = iscsi_xmit_task(conn);
 		if (rc)
 			goto again;
 		/*
-		 * we could continuously get new ctask requests so
+		 * we could continuously get new task requests so
 		 * we need to check the mgmt queue for nops that need to
 		 * be sent to aviod starvation
 		 */
@@ -1048,11 +1106,11 @@ check_mgmt:
 		if (conn->session->state == ISCSI_STATE_LOGGING_OUT)
 			break;
 
-		conn->ctask = list_entry(conn->requeue.next,
-					 struct iscsi_cmd_task, running);
-		conn->ctask->state = ISCSI_TASK_RUNNING;
+		conn->task = list_entry(conn->requeue.next,
+					 struct iscsi_task, running);
+		conn->task->state = ISCSI_TASK_RUNNING;
 		list_move_tail(conn->requeue.next, &conn->run_list);
-		rc = iscsi_xmit_ctask(conn);
+		rc = iscsi_xmit_task(conn);
 		if (rc)
 			goto again;
 		if (!list_empty(&conn->mgmtqueue))
@@ -1096,11 +1154,12 @@ enum {
 
 int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 {
+	struct iscsi_cls_session *cls_session;
 	struct Scsi_Host *host;
 	int reason = 0;
 	struct iscsi_session *session;
 	struct iscsi_conn *conn;
-	struct iscsi_cmd_task *ctask = NULL;
+	struct iscsi_task *task = NULL;
 
 	sc->scsi_done = done;
 	sc->result = 0;
@@ -1109,10 +1168,11 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 	host = sc->device->host;
 	spin_unlock(host->host_lock);
 
-	session = iscsi_hostdata(host->hostdata);
+	cls_session = starget_to_session(scsi_target(sc->device));
+	session = cls_session->dd_data;
 	spin_lock(&session->lock);
 
-	reason = iscsi_session_chkready(session_to_cls(session));
+	reason = iscsi_session_chkready(cls_session);
 	if (reason) {
 		sc->result = reason;
 		goto fault;
@@ -1167,26 +1227,39 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 		goto reject;
 	}
 
-	if (!__kfifo_get(session->cmdpool.queue, (void*)&ctask,
+	if (!__kfifo_get(session->cmdpool.queue, (void*)&task,
 			 sizeof(void*))) {
 		reason = FAILURE_OOM;
 		goto reject;
 	}
-	session->queued_cmdsn++;
-
 	sc->SCp.phase = session->age;
-	sc->SCp.ptr = (char *)ctask;
-
-	atomic_set(&ctask->refcount, 1);
-	ctask->state = ISCSI_TASK_PENDING;
-	ctask->conn = conn;
-	ctask->sc = sc;
-	INIT_LIST_HEAD(&ctask->running);
+	sc->SCp.ptr = (char *)task;
+
+	atomic_set(&task->refcount, 1);
+	task->state = ISCSI_TASK_PENDING;
+	task->conn = conn;
+	task->sc = sc;
+	INIT_LIST_HEAD(&task->running);
+	list_add_tail(&task->running, &conn->xmitqueue);
+
+	if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+		if (iscsi_prep_scsi_cmd_pdu(task)) {
+			sc->result = DID_ABORT << 16;
+			sc->scsi_done = NULL;
+			iscsi_complete_command(task);
+			goto fault;
+		}
+		if (session->tt->xmit_task(task)) {
+			sc->scsi_done = NULL;
+			iscsi_complete_command(task);
+			reason = FAILURE_SESSION_NOT_READY;
+			goto reject;
+		}
+	} else
+		scsi_queue_work(session->host, &conn->xmitwork);
 
-	list_add_tail(&ctask->running, &conn->xmitqueue);
+	session->queued_cmdsn++;
 	spin_unlock(&session->lock);
-
-	scsi_queue_work(host, &conn->xmitwork);
 	spin_lock(host->host_lock);
 	return 0;
 
@@ -1205,7 +1278,7 @@ fault:
 		scsi_out(sc)->resid = scsi_out(sc)->length;
 		scsi_in(sc)->resid = scsi_in(sc)->length;
 	}
-	sc->scsi_done(sc);
+	done(sc);
 	spin_lock(host->host_lock);
 	return 0;
 }
@@ -1222,7 +1295,7 @@ EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);
 
 void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
 {
-	struct iscsi_session *session = class_to_transport_session(cls_session);
+	struct iscsi_session *session = cls_session->dd_data;
 
 	spin_lock_bh(&session->lock);
 	if (session->state != ISCSI_STATE_LOGGED_IN) {
@@ -1236,9 +1309,13 @@ EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout);
 
 int iscsi_eh_host_reset(struct scsi_cmnd *sc)
 {
-	struct Scsi_Host *host = sc->device->host;
-	struct iscsi_session *session = iscsi_hostdata(host->hostdata);
-	struct iscsi_conn *conn = session->leadconn;
+	struct iscsi_cls_session *cls_session;
+	struct iscsi_session *session;
+	struct iscsi_conn *conn;
+
+	cls_session = starget_to_session(scsi_target(sc->device));
+	session = cls_session->dd_data;
+	conn = session->leadconn;
 
 	mutex_lock(&session->eh_mutex);
 	spin_lock_bh(&session->lock);
@@ -1300,11 +1377,11 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
 				   int timeout)
 {
 	struct iscsi_session *session = conn->session;
-	struct iscsi_mgmt_task *mtask;
+	struct iscsi_task *task;
 
-	mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
+	task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
 				      NULL, 0);
-	if (!mtask) {
+	if (!task) {
 		spin_unlock_bh(&session->lock);
 		iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
 		spin_lock_bh(&session->lock);
@@ -1320,7 +1397,6 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
 
 	spin_unlock_bh(&session->lock);
 	mutex_unlock(&session->eh_mutex);
-	scsi_queue_work(session->host, &conn->xmitwork);
 
 	/*
 	 * block eh thread until:
@@ -1339,7 +1415,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
 
 	mutex_lock(&session->eh_mutex);
 	spin_lock_bh(&session->lock);
-	/* if the session drops it will clean up the mtask */
+	/* if the session drops it will clean up the task */
 	if (age != session->age ||
 	    session->state != ISCSI_STATE_LOGGED_IN)
 		return -ENOTCONN;
@@ -1353,48 +1429,51 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
 static void fail_all_commands(struct iscsi_conn *conn, unsigned lun,
 			      int error)
 {
-	struct iscsi_cmd_task *ctask, *tmp;
+	struct iscsi_task *task, *tmp;
 
-	if (conn->ctask && (conn->ctask->sc->device->lun == lun || lun == -1))
-		conn->ctask = NULL;
+	if (conn->task && (conn->task->sc->device->lun == lun || lun == -1))
+		conn->task = NULL;
 
 	/* flush pending */
-	list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) {
-		if (lun == ctask->sc->device->lun || lun == -1) {
+	list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) {
+		if (lun == task->sc->device->lun || lun == -1) {
 			debug_scsi("failing pending sc %p itt 0x%x\n",
-				   ctask->sc, ctask->itt);
-			fail_command(conn, ctask, error << 16);
+				   task->sc, task->itt);
+			fail_command(conn, task, error << 16);
 		}
 	}
 
-	list_for_each_entry_safe(ctask, tmp, &conn->requeue, running) {
-		if (lun == ctask->sc->device->lun || lun == -1) {
+	list_for_each_entry_safe(task, tmp, &conn->requeue, running) {
+		if (lun == task->sc->device->lun || lun == -1) {
 			debug_scsi("failing requeued sc %p itt 0x%x\n",
-				   ctask->sc, ctask->itt);
-			fail_command(conn, ctask, error << 16);
+				   task->sc, task->itt);
+			fail_command(conn, task, error << 16);
 		}
 	}
 
 	/* fail all other running */
-	list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
-		if (lun == ctask->sc->device->lun || lun == -1) {
+	list_for_each_entry_safe(task, tmp, &conn->run_list, running) {
+		if (lun == task->sc->device->lun || lun == -1) {
 			debug_scsi("failing in progress sc %p itt 0x%x\n",
-				   ctask->sc, ctask->itt);
-			fail_command(conn, ctask, DID_BUS_BUSY << 16);
+				   task->sc, task->itt);
+			fail_command(conn, task, DID_BUS_BUSY << 16);
 		}
 	}
 }
 
-static void iscsi_suspend_tx(struct iscsi_conn *conn)
+void iscsi_suspend_tx(struct iscsi_conn *conn)
 {
 	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
-	scsi_flush_work(conn->session->host);
+	if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+		scsi_flush_work(conn->session->host);
 }
+EXPORT_SYMBOL_GPL(iscsi_suspend_tx);
 
 static void iscsi_start_tx(struct iscsi_conn *conn)
 {
 	clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
-	scsi_queue_work(conn->session->host, &conn->xmitwork);
+	if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+		scsi_queue_work(conn->session->host, &conn->xmitwork);
 }
 
 static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd)
@@ -1405,7 +1484,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd)
 	enum scsi_eh_timer_return rc = EH_NOT_HANDLED;
 
 	cls_session = starget_to_session(scsi_target(scmd->device));
-	session = class_to_transport_session(cls_session);
+	session = cls_session->dd_data;
 
 	debug_scsi("scsi cmd %p timedout\n", scmd);
 
@@ -1443,7 +1522,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd)
 			   jiffies))
 		rc = EH_RESET_TIMER;
 	/* if in the middle of checking the transport then give us more time */
-	if (conn->ping_mtask)
+	if (conn->ping_task)
 		rc = EH_RESET_TIMER;
 done:
 	spin_unlock(&session->lock);
@@ -1467,7 +1546,7 @@ static void iscsi_check_transport_timeouts(unsigned long data)
 
 	recv_timeout *= HZ;
 	last_recv = conn->last_recv;
-	if (conn->ping_mtask &&
+	if (conn->ping_task &&
 	    time_before_eq(conn->last_ping + (conn->ping_timeout * HZ),
 			   jiffies)) {
 		iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs "
@@ -1493,27 +1572,30 @@ done:
 	spin_unlock(&session->lock);
 }
 
-static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask,
+static void iscsi_prep_abort_task_pdu(struct iscsi_task *task,
 				      struct iscsi_tm *hdr)
 {
 	memset(hdr, 0, sizeof(*hdr));
 	hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
 	hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK;
 	hdr->flags |= ISCSI_FLAG_CMD_FINAL;
-	memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
-	hdr->rtt = ctask->hdr->itt;
-	hdr->refcmdsn = ctask->hdr->cmdsn;
+	memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun));
+	hdr->rtt = task->hdr->itt;
+	hdr->refcmdsn = task->hdr->cmdsn;
 }
 
 int iscsi_eh_abort(struct scsi_cmnd *sc)
 {
-	struct Scsi_Host *host = sc->device->host;
-	struct iscsi_session *session = iscsi_hostdata(host->hostdata);
+	struct iscsi_cls_session *cls_session;
+	struct iscsi_session *session;
 	struct iscsi_conn *conn;
-	struct iscsi_cmd_task *ctask;
+	struct iscsi_task *task;
 	struct iscsi_tm *hdr;
 	int rc, age;
 
+	cls_session = starget_to_session(scsi_target(sc->device));
+	session = cls_session->dd_data;
+
 	mutex_lock(&session->eh_mutex);
 	spin_lock_bh(&session->lock);
 	/*
@@ -1542,17 +1624,17 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 	conn->eh_abort_cnt++;
 	age = session->age;
 
-	ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
-	debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
+	task = (struct iscsi_task *)sc->SCp.ptr;
+	debug_scsi("aborting [sc %p itt 0x%x]\n", sc, task->itt);
 
-	/* ctask completed before time out */
-	if (!ctask->sc) {
+	/* task completed before time out */
+	if (!task->sc) {
 		debug_scsi("sc completed while abort in progress\n");
 		goto success;
 	}
 
-	if (ctask->state == ISCSI_TASK_PENDING) {
-		fail_command(conn, ctask, DID_ABORT << 16);
+	if (task->state == ISCSI_TASK_PENDING) {
+		fail_command(conn, task, DID_ABORT << 16);
 		goto success;
 	}
 
@@ -1562,7 +1644,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 	conn->tmf_state = TMF_QUEUED;
 
 	hdr = &conn->tmhdr;
-	iscsi_prep_abort_task_pdu(ctask, hdr);
+	iscsi_prep_abort_task_pdu(task, hdr);
 
 	if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) {
 		rc = FAILED;
@@ -1572,16 +1654,20 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 	switch (conn->tmf_state) {
 	case TMF_SUCCESS:
 		spin_unlock_bh(&session->lock);
+		/*
+		 * stop tx side incase the target had sent a abort rsp but
+		 * the initiator was still writing out data.
+		 */
 		iscsi_suspend_tx(conn);
 		/*
-		 * clean up task if aborted. grab the recv lock as a writer
+		 * we do not stop the recv side because targets have been
+		 * good and have never sent us a successful tmf response
+		 * then sent more data for the cmd.
 		 */
-		write_lock_bh(conn->recv_lock);
 		spin_lock(&session->lock);
-		fail_command(conn, ctask, DID_ABORT << 16);
+		fail_command(conn, task, DID_ABORT << 16);
 		conn->tmf_state = TMF_INITIAL;
 		spin_unlock(&session->lock);
-		write_unlock_bh(conn->recv_lock);
 		iscsi_start_tx(conn);
 		goto success_unlocked;
 	case TMF_TIMEDOUT:
@@ -1591,7 +1677,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 	case TMF_NOT_FOUND:
 		if (!sc->SCp.ptr) {
 			conn->tmf_state = TMF_INITIAL;
-			/* ctask completed before tmf abort response */
+			/* task completed before tmf abort response */
 			debug_scsi("sc completed while abort in progress\n");
 			goto success;
 		}
@@ -1604,7 +1690,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 success:
 	spin_unlock_bh(&session->lock);
 success_unlocked:
-	debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
+	debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, task->itt);
 	mutex_unlock(&session->eh_mutex);
 	return SUCCESS;
 
@@ -1612,7 +1698,7 @@ failed:
 	spin_unlock_bh(&session->lock);
 failed_unlocked:
 	debug_scsi("abort failed [sc %p itt 0x%x]\n", sc,
-		    ctask ? ctask->itt : 0);
+		    task ? task->itt : 0);
 	mutex_unlock(&session->eh_mutex);
 	return FAILED;
 }
@@ -1630,12 +1716,15 @@ static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
 
 int iscsi_eh_device_reset(struct scsi_cmnd *sc)
 {
-	struct Scsi_Host *host = sc->device->host;
-	struct iscsi_session *session = iscsi_hostdata(host->hostdata);
+	struct iscsi_cls_session *cls_session;
+	struct iscsi_session *session;
 	struct iscsi_conn *conn;
 	struct iscsi_tm *hdr;
 	int rc = FAILED;
 
+	cls_session = starget_to_session(scsi_target(sc->device));
+	session = cls_session->dd_data;
+
 	debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun);
 
 	mutex_lock(&session->eh_mutex);
@@ -1678,13 +1767,11 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
 	spin_unlock_bh(&session->lock);
 
 	iscsi_suspend_tx(conn);
-	/* need to grab the recv lock then session lock */
-	write_lock_bh(conn->recv_lock);
+
 	spin_lock(&session->lock);
 	fail_all_commands(conn, sc->device->lun, DID_ERROR);
 	conn->tmf_state = TMF_INITIAL;
 	spin_unlock(&session->lock);
-	write_unlock_bh(conn->recv_lock);
 
 	iscsi_start_tx(conn);
 	goto done;
@@ -1760,177 +1847,203 @@ void iscsi_pool_free(struct iscsi_pool *q)
 }
 EXPORT_SYMBOL_GPL(iscsi_pool_free);
 
-/*
- * iSCSI Session's hostdata organization:
+/**
+ * iscsi_host_add - add host to system
+ * @shost: scsi host
+ * @pdev: parent device
+ *
+ * This should be called by partial offload and software iscsi drivers
+ * to add a host to the system.
+ */
+int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev)
+{
+	if (!shost->can_queue)
+		shost->can_queue = ISCSI_DEF_XMIT_CMDS_MAX;
+
+	return scsi_add_host(shost, pdev);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_add);
+
+/**
+ * iscsi_host_alloc - allocate a host and driver data
+ * @sht: scsi host template
+ * @dd_data_size: driver host data size
+ * @qdepth: default device queue depth
+ *
+ * This should be called by partial offload and software iscsi drivers.
+ * To access the driver specific memory use the iscsi_host_priv() macro.
+ */
+struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
+				   int dd_data_size, uint16_t qdepth)
+{
+	struct Scsi_Host *shost;
+
+	shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size);
+	if (!shost)
+		return NULL;
+	shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out;
+
+	if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) {
+		if (qdepth != 0)
+			printk(KERN_ERR "iscsi: invalid queue depth of %d. "
+			       "Queue depth must be between 1 and %d.\n",
+			       qdepth, ISCSI_MAX_CMD_PER_LUN);
+		qdepth = ISCSI_DEF_CMD_PER_LUN;
+	}
+	shost->cmd_per_lun = qdepth;
+	return shost;
+}
+EXPORT_SYMBOL_GPL(iscsi_host_alloc);
+
+/**
+ * iscsi_host_remove - remove host and sessions
+ * @shost: scsi host
  *
- *    *------------------* <== hostdata_session(host->hostdata)
- *    | ptr to class sess|
- *    |------------------| <== iscsi_hostdata(host->hostdata)
- *    | iscsi_session    |
- *    *------------------*
+ * This will also remove any sessions attached to the host, but if userspace
+ * is managing the session at the same time this will break. TODO: add
+ * refcounting to the netlink iscsi interface so a rmmod or host hot unplug
+ * does not remove the memory from under us.
  */
+void iscsi_host_remove(struct Scsi_Host *shost)
+{
+	iscsi_host_for_each_session(shost, iscsi_session_teardown);
+	scsi_remove_host(shost);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_remove);
 
-#define hostdata_privsize(_sz)	(sizeof(unsigned long) + _sz + \
-				 _sz % sizeof(unsigned long))
+void iscsi_host_free(struct Scsi_Host *shost)
+{
+	struct iscsi_host *ihost = shost_priv(shost);
 
-#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+	kfree(ihost->netdev);
+	kfree(ihost->hwaddress);
+	kfree(ihost->initiatorname);
+	scsi_host_put(shost);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_free);
 
 /**
  * iscsi_session_setup - create iscsi cls session and host and session
- * @scsit: scsi transport template
  * @iscsit: iscsi transport template
- * @cmds_max: scsi host can queue
- * @qdepth: scsi host cmds per lun
- * @cmd_task_size: LLD ctask private data size
- * @mgmt_task_size: LLD mtask private data size
+ * @shost: scsi host
+ * @cmds_max: session can queue
+ * @cmd_task_size: LLD task private data size
  * @initial_cmdsn: initial CmdSN
- * @hostno: host no allocated
  *
  * This can be used by software iscsi_transports that allocate
  * a session per scsi host.
- **/
+ *
+ * Callers should set cmds_max to the largest total numer (mgmt + scsi) of
+ * tasks they support. The iscsi layer reserves ISCSI_MGMT_CMDS_MAX tasks
+ * for nop handling and login/logout requests.
+ */
 struct iscsi_cls_session *
-iscsi_session_setup(struct iscsi_transport *iscsit,
-		    struct scsi_transport_template *scsit,
-		    uint16_t cmds_max, uint16_t qdepth,
-		    int cmd_task_size, int mgmt_task_size,
-		    uint32_t initial_cmdsn, uint32_t *hostno)
+iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
+		    uint16_t cmds_max, int cmd_task_size,
+		    uint32_t initial_cmdsn, unsigned int id)
 {
-	struct Scsi_Host *shost;
 	struct iscsi_session *session;
 	struct iscsi_cls_session *cls_session;
-	int cmd_i;
+	int cmd_i, scsi_cmds, total_cmds = cmds_max;
 
-	if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) {
-		if (qdepth != 0)
-			printk(KERN_ERR "iscsi: invalid queue depth of %d. "
-			      "Queue depth must be between 1 and %d.\n",
-			      qdepth, ISCSI_MAX_CMD_PER_LUN);
-		qdepth = ISCSI_DEF_CMD_PER_LUN;
+	if (!total_cmds)
+		total_cmds = ISCSI_DEF_XMIT_CMDS_MAX;
+	/*
+	 * The iscsi layer needs some tasks for nop handling and tmfs,
+	 * so the cmds_max must at least be greater than ISCSI_MGMT_CMDS_MAX
+	 * + 1 command for scsi IO.
+	 */
+	if (total_cmds < ISCSI_TOTAL_CMDS_MIN) {
+		printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue "
+		       "must be a power of two that is at least %d.\n",
+		       total_cmds, ISCSI_TOTAL_CMDS_MIN);
+		return NULL;
 	}
 
-	if (!is_power_of_2(cmds_max) || cmds_max >= ISCSI_MGMT_ITT_OFFSET ||
-	    cmds_max < 2) {
-		if (cmds_max != 0)
-			printk(KERN_ERR "iscsi: invalid can_queue of %d. "
-			       "can_queue must be a power of 2 and between "
-			       "2 and %d - setting to %d.\n", cmds_max,
-			       ISCSI_MGMT_ITT_OFFSET, ISCSI_DEF_XMIT_CMDS_MAX);
-		cmds_max = ISCSI_DEF_XMIT_CMDS_MAX;
+	if (total_cmds > ISCSI_TOTAL_CMDS_MAX) {
+		printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue "
+		       "must be a power of 2 less than or equal to %d.\n",
+		       cmds_max, ISCSI_TOTAL_CMDS_MAX);
+		total_cmds = ISCSI_TOTAL_CMDS_MAX;
 	}
 
-	shost = scsi_host_alloc(iscsit->host_template,
-				hostdata_privsize(sizeof(*session)));
-	if (!shost)
-		return NULL;
-
-	/* the iscsi layer takes one task for reserve */
-	shost->can_queue = cmds_max - 1;
-	shost->cmd_per_lun = qdepth;
-	shost->max_id = 1;
-	shost->max_channel = 0;
-	shost->max_lun = iscsit->max_lun;
-	shost->max_cmd_len = iscsit->max_cmd_len;
-	shost->transportt = scsit;
-	shost->transportt->create_work_queue = 1;
-	shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out;
-	*hostno = shost->host_no;
+	if (!is_power_of_2(total_cmds)) {
+		printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue "
+		       "must be a power of 2.\n", total_cmds);
+		total_cmds = rounddown_pow_of_two(total_cmds);
+		if (total_cmds < ISCSI_TOTAL_CMDS_MIN)
+			return NULL;
+		printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n",
+		       total_cmds);
+	}
+	scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX;
 
-	session = iscsi_hostdata(shost->hostdata);
-	memset(session, 0, sizeof(struct iscsi_session));
+	cls_session = iscsi_alloc_session(shost, iscsit,
+					  sizeof(struct iscsi_session));
+	if (!cls_session)
+		return NULL;
+	session = cls_session->dd_data;
+	session->cls_session = cls_session;
 	session->host = shost;
 	session->state = ISCSI_STATE_FREE;
 	session->fast_abort = 1;
 	session->lu_reset_timeout = 15;
 	session->abort_timeout = 10;
-	session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
-	session->cmds_max = cmds_max;
+	session->scsi_cmds_max = scsi_cmds;
+	session->cmds_max = total_cmds;
 	session->queued_cmdsn = session->cmdsn = initial_cmdsn;
 	session->exp_cmdsn = initial_cmdsn + 1;
 	session->max_cmdsn = initial_cmdsn + 1;
 	session->max_r2t = 1;
 	session->tt = iscsit;
 	mutex_init(&session->eh_mutex);
+	spin_lock_init(&session->lock);
 
 	/* initialize SCSI PDU commands pool */
 	if (iscsi_pool_init(&session->cmdpool, session->cmds_max,
 			    (void***)&session->cmds,
-			    cmd_task_size + sizeof(struct iscsi_cmd_task)))
+			    cmd_task_size + sizeof(struct iscsi_task)))
 		goto cmdpool_alloc_fail;
 
 	/* pre-format cmds pool with ITT */
 	for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
-		struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
+		struct iscsi_task *task = session->cmds[cmd_i];
 
 		if (cmd_task_size)
-			ctask->dd_data = &ctask[1];
-		ctask->itt = cmd_i;
-		INIT_LIST_HEAD(&ctask->running);
-	}
-
-	spin_lock_init(&session->lock);
-
-	/* initialize immediate command pool */
-	if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max,
-			   (void***)&session->mgmt_cmds,
-			   mgmt_task_size + sizeof(struct iscsi_mgmt_task)))
-		goto mgmtpool_alloc_fail;
-
-
-	/* pre-format immediate cmds pool with ITT */
-	for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
-		struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i];
-
-		if (mgmt_task_size)
-			mtask->dd_data = &mtask[1];
-		mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i;
-		INIT_LIST_HEAD(&mtask->running);
+			task->dd_data = &task[1];
+		task->itt = cmd_i;
+		INIT_LIST_HEAD(&task->running);
 	}
 
-	if (scsi_add_host(shost, NULL))
-		goto add_host_fail;
-
 	if (!try_module_get(iscsit->owner))
-		goto cls_session_fail;
-
-	cls_session = iscsi_create_session(shost, iscsit, 0);
-	if (!cls_session)
-		goto module_put;
-	*(unsigned long*)shost->hostdata = (unsigned long)cls_session;
+		goto module_get_fail;
 
+	if (iscsi_add_session(cls_session, id))
+		goto cls_session_fail;
 	return cls_session;
 
-module_put:
-	module_put(iscsit->owner);
 cls_session_fail:
-	scsi_remove_host(shost);
-add_host_fail:
-	iscsi_pool_free(&session->mgmtpool);
-mgmtpool_alloc_fail:
+	module_put(iscsit->owner);
+module_get_fail:
 	iscsi_pool_free(&session->cmdpool);
 cmdpool_alloc_fail:
-	scsi_host_put(shost);
+	iscsi_free_session(cls_session);
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(iscsi_session_setup);
 
 /**
  * iscsi_session_teardown - destroy session, host, and cls_session
- * shost: scsi host
+ * @cls_session: iscsi session
  *
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
+ * The driver must have called iscsi_remove_session before
+ * calling this.
+ */
 void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
 {
-	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
-	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+	struct iscsi_session *session = cls_session->dd_data;
 	struct module *owner = cls_session->transport->owner;
 
-	iscsi_remove_session(cls_session);
-	scsi_remove_host(shost);
-
-	iscsi_pool_free(&session->mgmtpool);
 	iscsi_pool_free(&session->cmdpool);
 
 	kfree(session->password);
@@ -1938,12 +2051,10 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
 	kfree(session->username);
 	kfree(session->username_in);
 	kfree(session->targetname);
-	kfree(session->netdev);
-	kfree(session->hwaddress);
 	kfree(session->initiatorname);
+	kfree(session->ifacename);
 
-	iscsi_free_session(cls_session);
-	scsi_host_put(shost);
+	iscsi_destroy_session(cls_session);
 	module_put(owner);
 }
 EXPORT_SYMBOL_GPL(iscsi_session_teardown);
@@ -1951,22 +2062,26 @@ EXPORT_SYMBOL_GPL(iscsi_session_teardown);
 /**
  * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn
  * @cls_session: iscsi_cls_session
+ * @dd_size: private driver data size
  * @conn_idx: cid
- **/
+ */
 struct iscsi_cls_conn *
-iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
+iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
+		 uint32_t conn_idx)
 {
-	struct iscsi_session *session = class_to_transport_session(cls_session);
+	struct iscsi_session *session = cls_session->dd_data;
 	struct iscsi_conn *conn;
 	struct iscsi_cls_conn *cls_conn;
 	char *data;
 
-	cls_conn = iscsi_create_conn(cls_session, conn_idx);
+	cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size,
+				     conn_idx);
 	if (!cls_conn)
 		return NULL;
 	conn = cls_conn->dd_data;
-	memset(conn, 0, sizeof(*conn));
+	memset(conn, 0, sizeof(*conn) + dd_size);
 
+	conn->dd_data = cls_conn->dd_data + sizeof(*conn);
 	conn->session = session;
 	conn->cls_conn = cls_conn;
 	conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
@@ -1985,30 +2100,30 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
 	INIT_LIST_HEAD(&conn->requeue);
 	INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
 
-	/* allocate login_mtask used for the login/text sequences */
+	/* allocate login_task used for the login/text sequences */
 	spin_lock_bh(&session->lock);
-	if (!__kfifo_get(session->mgmtpool.queue,
-                         (void*)&conn->login_mtask,
+	if (!__kfifo_get(session->cmdpool.queue,
+                         (void*)&conn->login_task,
 			 sizeof(void*))) {
 		spin_unlock_bh(&session->lock);
-		goto login_mtask_alloc_fail;
+		goto login_task_alloc_fail;
 	}
 	spin_unlock_bh(&session->lock);
 
 	data = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN, GFP_KERNEL);
 	if (!data)
-		goto login_mtask_data_alloc_fail;
-	conn->login_mtask->data = conn->data = data;
+		goto login_task_data_alloc_fail;
+	conn->login_task->data = conn->data = data;
 
 	init_timer(&conn->tmf_timer);
 	init_waitqueue_head(&conn->ehwait);
 
 	return cls_conn;
 
-login_mtask_data_alloc_fail:
-	__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+login_task_data_alloc_fail:
+	__kfifo_put(session->cmdpool.queue, (void*)&conn->login_task,
 		    sizeof(void*));
-login_mtask_alloc_fail:
+login_task_alloc_fail:
 	iscsi_destroy_conn(cls_conn);
 	return NULL;
 }
@@ -2068,7 +2183,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
 	spin_lock_bh(&session->lock);
 	kfree(conn->data);
 	kfree(conn->persistent_address);
-	__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+	__kfifo_put(session->cmdpool.queue, (void*)&conn->login_task,
 		    sizeof(void*));
 	if (session->leadconn == conn)
 		session->leadconn = NULL;
@@ -2140,7 +2255,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 	}
 	spin_unlock_bh(&session->lock);
 
-	iscsi_unblock_session(session_to_cls(session));
+	iscsi_unblock_session(session->cls_session);
 	wake_up(&conn->ehwait);
 	return 0;
 }
@@ -2149,21 +2264,23 @@ EXPORT_SYMBOL_GPL(iscsi_conn_start);
 static void
 flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
 {
-	struct iscsi_mgmt_task *mtask, *tmp;
+	struct iscsi_task *task, *tmp;
 
 	/* handle pending */
-	list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) {
-		debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
-		iscsi_free_mgmt_task(conn, mtask);
+	list_for_each_entry_safe(task, tmp, &conn->mgmtqueue, running) {
+		debug_scsi("flushing pending mgmt task itt 0x%x\n", task->itt);
+		/* release ref from prep task */
+		__iscsi_put_task(task);
 	}
 
 	/* handle running */
-	list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) {
-		debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt);
-		iscsi_free_mgmt_task(conn, mtask);
+	list_for_each_entry_safe(task, tmp, &conn->mgmt_run_list, running) {
+		debug_scsi("flushing running mgmt task itt 0x%x\n", task->itt);
+		/* release ref from prep task */
+		__iscsi_put_task(task);
 	}
 
-	conn->mtask = NULL;
+	conn->task = NULL;
 }
 
 static void iscsi_start_session_recovery(struct iscsi_session *session,
@@ -2182,17 +2299,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
 	}
 
 	/*
-	 * The LLD either freed/unset the lock on us, or userspace called
-	 * stop but did not create a proper connection (connection was never
-	 * bound or it was unbound then stop was called).
-	 */
-	if (!conn->recv_lock) {
-		spin_unlock_bh(&session->lock);
-		mutex_unlock(&session->eh_mutex);
-		return;
-	}
-
-	/*
 	 * When this is called for the in_login state, we only want to clean
 	 * up the login task and connection. We do not need to block and set
 	 * the recovery state again
@@ -2208,11 +2314,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
 	spin_unlock_bh(&session->lock);
 
 	iscsi_suspend_tx(conn);
-
-	write_lock_bh(conn->recv_lock);
-	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
-	write_unlock_bh(conn->recv_lock);
-
 	/*
 	 * for connection level recovery we should not calculate
 	 * header digest. conn->hdr_size used for optimization
@@ -2225,7 +2326,7 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
 		if (session->state == ISCSI_STATE_IN_RECOVERY &&
 		    old_stop_stage != STOP_CONN_RECOVER) {
 			debug_scsi("blocking session\n");
-			iscsi_block_session(session_to_cls(session));
+			iscsi_block_session(session->cls_session);
 		}
 	}
 
@@ -2260,7 +2361,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_stop);
 int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
 		    struct iscsi_cls_conn *cls_conn, int is_leading)
 {
-	struct iscsi_session *session = class_to_transport_session(cls_session);
+	struct iscsi_session *session = cls_session->dd_data;
 	struct iscsi_conn *conn = cls_conn->dd_data;
 
 	spin_lock_bh(&session->lock);
@@ -2399,6 +2500,14 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
 		if (!conn->persistent_address)
 			return -ENOMEM;
 		break;
+	case ISCSI_PARAM_IFACE_NAME:
+		if (!session->ifacename)
+			session->ifacename = kstrdup(buf, GFP_KERNEL);
+		break;
+	case ISCSI_PARAM_INITIATOR_NAME:
+		if (!session->initiatorname)
+			session->initiatorname = kstrdup(buf, GFP_KERNEL);
+		break;
 	default:
 		return -ENOSYS;
 	}
@@ -2410,8 +2519,7 @@ EXPORT_SYMBOL_GPL(iscsi_set_param);
 int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
 			    enum iscsi_param param, char *buf)
 {
-	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
-	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+	struct iscsi_session *session = cls_session->dd_data;
 	int len;
 
 	switch(param) {
@@ -2466,6 +2574,15 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
 	case ISCSI_PARAM_PASSWORD_IN:
 		len = sprintf(buf, "%s\n", session->password_in);
 		break;
+	case ISCSI_PARAM_IFACE_NAME:
+		len = sprintf(buf, "%s\n", session->ifacename);
+		break;
+	case ISCSI_PARAM_INITIATOR_NAME:
+		if (!session->initiatorname)
+			len = sprintf(buf, "%s\n", "unknown");
+		else
+			len = sprintf(buf, "%s\n", session->initiatorname);
+		break;
 	default:
 		return -ENOSYS;
 	}
@@ -2525,29 +2642,35 @@ EXPORT_SYMBOL_GPL(iscsi_conn_get_param);
 int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
 			 char *buf)
 {
-	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+	struct iscsi_host *ihost = shost_priv(shost);
 	int len;
 
 	switch (param) {
 	case ISCSI_HOST_PARAM_NETDEV_NAME:
-		if (!session->netdev)
+		if (!ihost->netdev)
 			len = sprintf(buf, "%s\n", "default");
 		else
-			len = sprintf(buf, "%s\n", session->netdev);
+			len = sprintf(buf, "%s\n", ihost->netdev);
 		break;
 	case ISCSI_HOST_PARAM_HWADDRESS:
-		if (!session->hwaddress)
+		if (!ihost->hwaddress)
 			len = sprintf(buf, "%s\n", "default");
 		else
-			len = sprintf(buf, "%s\n", session->hwaddress);
+			len = sprintf(buf, "%s\n", ihost->hwaddress);
 		break;
 	case ISCSI_HOST_PARAM_INITIATOR_NAME:
-		if (!session->initiatorname)
+		if (!ihost->initiatorname)
 			len = sprintf(buf, "%s\n", "unknown");
 		else
-			len = sprintf(buf, "%s\n", session->initiatorname);
+			len = sprintf(buf, "%s\n", ihost->initiatorname);
+		break;
+	case ISCSI_HOST_PARAM_IPADDRESS:
+		if (!strlen(ihost->local_address))
+			len = sprintf(buf, "%s\n", "unknown");
+		else
+			len = sprintf(buf, "%s\n",
+				      ihost->local_address);
 		break;
-
 	default:
 		return -ENOSYS;
 	}
@@ -2559,20 +2682,20 @@ EXPORT_SYMBOL_GPL(iscsi_host_get_param);
 int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param,
 			 char *buf, int buflen)
 {
-	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+	struct iscsi_host *ihost = shost_priv(shost);
 
 	switch (param) {
 	case ISCSI_HOST_PARAM_NETDEV_NAME:
-		if (!session->netdev)
-			session->netdev = kstrdup(buf, GFP_KERNEL);
+		if (!ihost->netdev)
+			ihost->netdev = kstrdup(buf, GFP_KERNEL);
 		break;
 	case ISCSI_HOST_PARAM_HWADDRESS:
-		if (!session->hwaddress)
-			session->hwaddress = kstrdup(buf, GFP_KERNEL);
+		if (!ihost->hwaddress)
+			ihost->hwaddress = kstrdup(buf, GFP_KERNEL);
 		break;
 	case ISCSI_HOST_PARAM_INITIATOR_NAME:
-		if (!session->initiatorname)
-			session->initiatorname = kstrdup(buf, GFP_KERNEL);
+		if (!ihost->initiatorname)
+			ihost->initiatorname = kstrdup(buf, GFP_KERNEL);
 		break;
 	default:
 		return -ENOSYS;
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index ec0b0f6e5e1a..e0e018d12653 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -33,6 +33,7 @@ struct lpfc_sli2_slim;
 #define LPFC_MAX_SG_SEG_CNT	256	/* sg element count per scsi cmnd */
 #define LPFC_IOCB_LIST_CNT	2250	/* list of IOCBs for fast-path usage. */
 #define LPFC_Q_RAMP_UP_INTERVAL 120     /* lun q_depth ramp up interval */
+#define LPFC_VNAME_LEN		100	/* vport symbolic name length */
 
 /*
  * Following time intervals are used of adjusting SCSI device
@@ -59,6 +60,9 @@ struct lpfc_sli2_slim;
 
 #define MAX_HBAEVT	32
 
+/* lpfc wait event data ready flag */
+#define LPFC_DATA_READY		(1<<0)
+
 enum lpfc_polling_flags {
 	ENABLE_FCP_RING_POLLING = 0x1,
 	DISABLE_FCP_RING_INT    = 0x2
@@ -425,9 +429,6 @@ struct lpfc_hba {
 
 	uint16_t pci_cfg_value;
 
-	uint8_t work_found;
-#define LPFC_MAX_WORKER_ITERATION  4
-
 	uint8_t fc_linkspeed;	/* Link speed after last READ_LA */
 
 	uint32_t fc_eventTag;	/* event tag for link attention */
@@ -489,8 +490,9 @@ struct lpfc_hba {
 	uint32_t              work_hs;      /* HS stored in case of ERRAT */
 	uint32_t              work_status[2]; /* Extra status from SLIM */
 
-	wait_queue_head_t    *work_wait;
+	wait_queue_head_t    work_waitq;
 	struct task_struct   *worker_thread;
+	long data_flags;
 
 	uint32_t hbq_in_use;		/* HBQs in use flag */
 	struct list_head hbqbuf_in_list;  /* in-fly hbq buffer list */
@@ -637,6 +639,17 @@ lpfc_is_link_up(struct lpfc_hba *phba)
 		phba->link_state == LPFC_HBA_READY;
 }
 
+static inline void
+lpfc_worker_wake_up(struct lpfc_hba *phba)
+{
+	/* Set the lpfc data pending flag */
+	set_bit(LPFC_DATA_READY, &phba->data_flags);
+
+	/* Wake up worker thread */
+	wake_up(&phba->work_waitq);
+	return;
+}
+
 #define FC_REG_DUMP_EVENT		0x10	/* Register for Dump events */
 #define FC_REG_TEMPERATURE_EVENT	0x20    /* Register for temperature
 						   event */
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 960baaf11fb1..37bfa0bd1dae 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -1995,8 +1995,7 @@ sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr,
 		/* Don't allow mailbox commands to be sent when blocked
 		 * or when in the middle of discovery
 		 */
-		if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO ||
-		    vport->fc_flag & FC_NDISC_ACTIVE) {
+		if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) {
 			sysfs_mbox_idle(phba);
 			spin_unlock_irq(&phba->hbalock);
 			return  -EAGAIN;
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 7c9f8317d972..1b8245213b83 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -142,7 +142,7 @@ int lpfc_config_port_post(struct lpfc_hba *);
 int lpfc_hba_down_prep(struct lpfc_hba *);
 int lpfc_hba_down_post(struct lpfc_hba *);
 void lpfc_hba_init(struct lpfc_hba *, uint32_t *);
-int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int, int);
+int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int);
 void lpfc_decode_firmware_rev(struct lpfc_hba *, char *, int);
 int lpfc_online(struct lpfc_hba *);
 void lpfc_unblock_mgmt_io(struct lpfc_hba *);
@@ -263,6 +263,7 @@ extern int lpfc_sli_mode;
 extern int lpfc_enable_npiv;
 
 int  lpfc_vport_symbolic_node_name(struct lpfc_vport *, char *, size_t);
+int  lpfc_vport_symbolic_port_name(struct lpfc_vport *, char *,	size_t);
 void lpfc_terminate_rport_io(struct fc_rport *);
 void lpfc_dev_loss_tmo_callbk(struct fc_rport *rport);
 
diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index 153afae567b5..7fc74cf5823b 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -101,7 +101,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 		/* Not enough posted buffers; Try posting more buffers */
 		phba->fc_stat.NoRcvBuf++;
 		if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
-			lpfc_post_buffer(phba, pring, 2, 1);
+			lpfc_post_buffer(phba, pring, 2);
 		return;
 	}
 
@@ -151,7 +151,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 			}
 			list_del(&iocbq->list);
 			lpfc_sli_release_iocbq(phba, iocbq);
-			lpfc_post_buffer(phba, pring, i, 1);
+			lpfc_post_buffer(phba, pring, i);
 		}
 	}
 }
@@ -990,7 +990,7 @@ lpfc_cmpl_ct_cmd_rff_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	return;
 }
 
-static int
+int
 lpfc_vport_symbolic_port_name(struct lpfc_vport *vport, char *symbol,
 	size_t size)
 {
@@ -1679,20 +1679,18 @@ lpfc_fdmi_tmo(unsigned long ptr)
 {
 	struct lpfc_vport *vport = (struct lpfc_vport *)ptr;
 	struct lpfc_hba   *phba = vport->phba;
+	uint32_t tmo_posted;
 	unsigned long iflag;
 
 	spin_lock_irqsave(&vport->work_port_lock, iflag);
-	if (!(vport->work_port_events & WORKER_FDMI_TMO)) {
+	tmo_posted = vport->work_port_events & WORKER_FDMI_TMO;
+	if (!tmo_posted)
 		vport->work_port_events |= WORKER_FDMI_TMO;
-		spin_unlock_irqrestore(&vport->work_port_lock, iflag);
+	spin_unlock_irqrestore(&vport->work_port_lock, iflag);
 
-		spin_lock_irqsave(&phba->hbalock, iflag);
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
-		spin_unlock_irqrestore(&phba->hbalock, iflag);
-	}
-	else
-		spin_unlock_irqrestore(&vport->work_port_lock, iflag);
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
+	return;
 }
 
 void
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 886c5f1b11d2..f54e0f7eaee3 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -1754,29 +1754,34 @@ lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 	struct lpfc_work_evt *evtp;
 
+	if (!(nlp->nlp_flag & NLP_DELAY_TMO))
+		return;
 	spin_lock_irq(shost->host_lock);
 	nlp->nlp_flag &= ~NLP_DELAY_TMO;
 	spin_unlock_irq(shost->host_lock);
 	del_timer_sync(&nlp->nlp_delayfunc);
 	nlp->nlp_last_elscmd = 0;
-
 	if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
 		list_del_init(&nlp->els_retry_evt.evt_listp);
 		/* Decrement nlp reference count held for the delayed retry */
 		evtp = &nlp->els_retry_evt;
 		lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
 	}
-
 	if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
 		spin_lock_irq(shost->host_lock);
 		nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 		spin_unlock_irq(shost->host_lock);
 		if (vport->num_disc_nodes) {
-			/* Check to see if there are more
-			 * PLOGIs to be sent
-			 */
-			lpfc_more_plogi(vport);
-
+			if (vport->port_state < LPFC_VPORT_READY) {
+				/* Check if there are more ADISCs to be sent */
+				lpfc_more_adisc(vport);
+				if ((vport->num_disc_nodes == 0) &&
+				    (vport->fc_npr_cnt))
+					lpfc_els_disc_plogi(vport);
+			} else {
+				/* Check if there are more PLOGIs to be sent */
+				lpfc_more_plogi(vport);
+			}
 			if (vport->num_disc_nodes == 0) {
 				spin_lock_irq(shost->host_lock);
 				vport->fc_flag &= ~FC_NDISC_ACTIVE;
@@ -1798,10 +1803,6 @@ lpfc_els_retry_delay(unsigned long ptr)
 	unsigned long flags;
 	struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
 
-	ndlp = (struct lpfc_nodelist *) ptr;
-	phba = ndlp->vport->phba;
-	evtp = &ndlp->els_retry_evt;
-
 	spin_lock_irqsave(&phba->hbalock, flags);
 	if (!list_empty(&evtp->evt_listp)) {
 		spin_unlock_irqrestore(&phba->hbalock, flags);
@@ -1812,11 +1813,11 @@ lpfc_els_retry_delay(unsigned long ptr)
 	 * count until the queued work is done
 	 */
 	evtp->evt_arg1  = lpfc_nlp_get(ndlp);
-	evtp->evt       = LPFC_EVT_ELS_RETRY;
-	list_add_tail(&evtp->evt_listp, &phba->work_list);
-	if (phba->work_wait)
+	if (evtp->evt_arg1) {
+		evtp->evt = LPFC_EVT_ELS_RETRY;
+		list_add_tail(&evtp->evt_listp, &phba->work_list);
 		lpfc_worker_wake_up(phba);
-
+	}
 	spin_unlock_irqrestore(&phba->hbalock, flags);
 	return;
 }
@@ -2761,10 +2762,11 @@ lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
 	npr = (PRLI *) pcmd;
 	vpd = &phba->vpd;
 	/*
-	 * If our firmware version is 3.20 or later,
-	 * set the following bits for FC-TAPE support.
+	 * If the remote port is a target and our firmware version is 3.20 or
+	 * later, set the following bits for FC-TAPE support.
 	 */
-	if (vpd->rev.feaLevelHigh >= 0x02) {
+	if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
+	    (vpd->rev.feaLevelHigh >= 0x02)) {
 		npr->ConfmComplAllowed = 1;
 		npr->Retry = 1;
 		npr->TaskRetryIdReq = 1;
@@ -3056,27 +3058,16 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport)
 {
 	struct lpfc_nodelist *ndlp = NULL;
 
-	/* Look at all nodes effected by pending RSCNs and move
-	 * them to NPR state.
-	 */
-
+	/* Move all affected nodes by pending RSCNs to NPR state. */
 	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
 		if (!NLP_CHK_NODE_ACT(ndlp) ||
-		    ndlp->nlp_state == NLP_STE_UNUSED_NODE ||
-		    lpfc_rscn_payload_check(vport, ndlp->nlp_DID) == 0)
+		    (ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
+		    !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
 			continue;
-
 		lpfc_disc_state_machine(vport, ndlp, NULL,
-						NLP_EVT_DEVICE_RECOVERY);
-
-		/*
-		 * Make sure NLP_DELAY_TMO is NOT running after a device
-		 * recovery event.
-		 */
-		if (ndlp->nlp_flag & NLP_DELAY_TMO)
-			lpfc_cancel_retry_delay_tmo(vport, ndlp);
+					NLP_EVT_DEVICE_RECOVERY);
+		lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	}
-
 	return 0;
 }
 
@@ -3781,91 +3772,27 @@ static int
 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
 		 struct lpfc_nodelist *fan_ndlp)
 {
-	struct lpfc_dmabuf *pcmd;
+	struct lpfc_hba *phba = vport->phba;
 	uint32_t *lp;
-	IOCB_t *icmd;
-	uint32_t cmd, did;
 	FAN *fp;
-	struct lpfc_nodelist *ndlp, *next_ndlp;
-	struct lpfc_hba *phba = vport->phba;
-
-	/* FAN received */
-	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
-			 "0265 FAN received\n");
-	icmd = &cmdiocb->iocb;
-	did = icmd->un.elsreq64.remoteID;
-	pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
-	lp = (uint32_t *)pcmd->virt;
-
-	cmd = *lp++;
-	fp = (FAN *) lp;
 
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
+	lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
+	fp = (FAN *) ++lp;
 	/* FAN received; Fan does not have a reply sequence */
-
-	if (phba->pport->port_state == LPFC_LOCAL_CFG_LINK) {
+	if ((vport == phba->pport) &&
+	    (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
 		if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
-			sizeof(struct lpfc_name)) != 0) ||
+			    sizeof(struct lpfc_name))) ||
 		    (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
-			sizeof(struct lpfc_name)) != 0)) {
-			/*
-			 * This node has switched fabrics.  FLOGI is required
-			 * Clean up the old rpi's
-			 */
-
-			list_for_each_entry_safe(ndlp, next_ndlp,
-						 &vport->fc_nodes, nlp_listp) {
-				if (!NLP_CHK_NODE_ACT(ndlp))
-					continue;
-				if (ndlp->nlp_state != NLP_STE_NPR_NODE)
-					continue;
-				if (ndlp->nlp_type & NLP_FABRIC) {
-					/*
-					 * Clean up old Fabric, Nameserver and
-					 * other NLP_FABRIC logins
-					 */
-					lpfc_drop_node(vport, ndlp);
-
-				} else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
-					/* Fail outstanding I/O now since this
-					 * device is marked for PLOGI
-					 */
-					lpfc_unreg_rpi(vport, ndlp);
-				}
-			}
-
+			    sizeof(struct lpfc_name)))) {
+			/* This port has switched fabrics. FLOGI is required */
 			lpfc_initial_flogi(vport);
-			return 0;
-		}
-		/* Discovery not needed,
-		 * move the nodes to their original state.
-		 */
-		list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
-					 nlp_listp) {
-			if (!NLP_CHK_NODE_ACT(ndlp))
-				continue;
-			if (ndlp->nlp_state != NLP_STE_NPR_NODE)
-				continue;
-
-			switch (ndlp->nlp_prev_state) {
-			case NLP_STE_UNMAPPED_NODE:
-				ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
-				lpfc_nlp_set_state(vport, ndlp,
-						   NLP_STE_UNMAPPED_NODE);
-				break;
-
-			case NLP_STE_MAPPED_NODE:
-				ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
-				lpfc_nlp_set_state(vport, ndlp,
-						   NLP_STE_MAPPED_NODE);
-				break;
-
-			default:
-				break;
-			}
+		} else {
+			/* FAN verified - skip FLOGI */
+			vport->fc_myDID = vport->fc_prevDID;
+			lpfc_issue_fabric_reglogin(vport);
 		}
-
-		/* Start discovery - this should just do CLEAR_LA */
-		lpfc_disc_start(vport);
 	}
 	return 0;
 }
@@ -3875,20 +3802,17 @@ lpfc_els_timeout(unsigned long ptr)
 {
 	struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
 	struct lpfc_hba   *phba = vport->phba;
+	uint32_t tmo_posted;
 	unsigned long iflag;
 
 	spin_lock_irqsave(&vport->work_port_lock, iflag);
-	if ((vport->work_port_events & WORKER_ELS_TMO) == 0) {
+	tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
+	if (!tmo_posted)
 		vport->work_port_events |= WORKER_ELS_TMO;
-		spin_unlock_irqrestore(&vport->work_port_lock, iflag);
+	spin_unlock_irqrestore(&vport->work_port_lock, iflag);
 
-		spin_lock_irqsave(&phba->hbalock, iflag);
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
-		spin_unlock_irqrestore(&phba->hbalock, iflag);
-	}
-	else
-		spin_unlock_irqrestore(&vport->work_port_lock, iflag);
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
 	return;
 }
 
@@ -3933,9 +3857,6 @@ lpfc_els_timeout_handler(struct lpfc_vport *vport)
 		    els_command == ELS_CMD_FDISC)
 			continue;
 
-		if (vport != piocb->vport)
-			continue;
-
 		if (piocb->drvrTimeout > 0) {
 			if (piocb->drvrTimeout >= timeout)
 				piocb->drvrTimeout -= timeout;
@@ -4089,7 +4010,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 	payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
 	cmd = *payload;
 	if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
-		lpfc_post_buffer(phba, pring, 1, 1);
+		lpfc_post_buffer(phba, pring, 1);
 
 	did = icmd->un.rcvels.remoteID;
 	if (icmd->ulpStatus) {
@@ -4398,7 +4319,7 @@ lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 		phba->fc_stat.NoRcvBuf++;
 		/* Not enough posted buffers; Try posting more buffers */
 		if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
-			lpfc_post_buffer(phba, pring, 0, 1);
+			lpfc_post_buffer(phba, pring, 0);
 		return;
 	}
 
@@ -4842,18 +4763,16 @@ lpfc_fabric_block_timeout(unsigned long ptr)
 	struct lpfc_hba  *phba = (struct lpfc_hba *) ptr;
 	unsigned long iflags;
 	uint32_t tmo_posted;
+
 	spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
 	tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
 	if (!tmo_posted)
 		phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
 	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
 
-	if (!tmo_posted) {
-		spin_lock_irqsave(&phba->hbalock, iflags);
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
-		spin_unlock_irqrestore(&phba->hbalock, iflags);
-	}
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
+	return;
 }
 
 static void
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 7cb68feb04fd..a98d11bf3576 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -153,11 +153,11 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
 	 * count until this queued work is done
 	 */
 	evtp->evt_arg1  = lpfc_nlp_get(ndlp);
-	evtp->evt       = LPFC_EVT_DEV_LOSS;
-	list_add_tail(&evtp->evt_listp, &phba->work_list);
-	if (phba->work_wait)
-		wake_up(phba->work_wait);
-
+	if (evtp->evt_arg1) {
+		evtp->evt = LPFC_EVT_DEV_LOSS;
+		list_add_tail(&evtp->evt_listp, &phba->work_list);
+		lpfc_worker_wake_up(phba);
+	}
 	spin_unlock_irq(&phba->hbalock);
 
 	return;
@@ -276,14 +276,6 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
 		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 }
 
-
-void
-lpfc_worker_wake_up(struct lpfc_hba *phba)
-{
-	wake_up(phba->work_wait);
-	return;
-}
-
 static void
 lpfc_work_list_done(struct lpfc_hba *phba)
 {
@@ -429,6 +421,8 @@ lpfc_work_done(struct lpfc_hba *phba)
 		|| (pring->flag & LPFC_DEFERRED_RING_EVENT)) {
 		if (pring->flag & LPFC_STOP_IOCB_EVENT) {
 			pring->flag |= LPFC_DEFERRED_RING_EVENT;
+			/* Set the lpfc data pending flag */
+			set_bit(LPFC_DATA_READY, &phba->data_flags);
 		} else {
 			pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
 			lpfc_sli_handle_slow_ring_event(phba, pring,
@@ -459,69 +453,29 @@ lpfc_work_done(struct lpfc_hba *phba)
 	lpfc_work_list_done(phba);
 }
 
-static int
-check_work_wait_done(struct lpfc_hba *phba)
-{
-	struct lpfc_vport *vport;
-	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
-	int rc = 0;
-
-	spin_lock_irq(&phba->hbalock);
-	list_for_each_entry(vport, &phba->port_list, listentry) {
-		if (vport->work_port_events) {
-			rc = 1;
-			break;
-		}
-	}
-	if (rc || phba->work_ha || (!list_empty(&phba->work_list)) ||
-	    kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) {
-		rc = 1;
-		phba->work_found++;
-	} else
-		phba->work_found = 0;
-	spin_unlock_irq(&phba->hbalock);
-	return rc;
-}
-
-
 int
 lpfc_do_work(void *p)
 {
 	struct lpfc_hba *phba = p;
 	int rc;
-	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq);
 
 	set_user_nice(current, -20);
-	phba->work_wait = &work_waitq;
-	phba->work_found = 0;
+	phba->data_flags = 0;
 
 	while (1) {
-
-		rc = wait_event_interruptible(work_waitq,
-					      check_work_wait_done(phba));
-
+		/* wait and check worker queue activities */
+		rc = wait_event_interruptible(phba->work_waitq,
+					(test_and_clear_bit(LPFC_DATA_READY,
+							    &phba->data_flags)
+					 || kthread_should_stop()));
 		BUG_ON(rc);
 
 		if (kthread_should_stop())
 			break;
 
+		/* Attend pending lpfc data processing */
 		lpfc_work_done(phba);
-
-		/* If there is alot of slow ring work, like during link up
-		 * check_work_wait_done() may cause this thread to not give
-		 * up the CPU for very long periods of time. This may cause
-		 * soft lockups or other problems. To avoid these situations
-		 * give up the CPU here after LPFC_MAX_WORKER_ITERATION
-		 * consecutive iterations.
-		 */
-		if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) {
-			phba->work_found = 0;
-			schedule();
-		}
 	}
-	spin_lock_irq(&phba->hbalock);
-	phba->work_wait = NULL;
-	spin_unlock_irq(&phba->hbalock);
 	return 0;
 }
 
@@ -551,10 +505,10 @@ lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
 
 	spin_lock_irqsave(&phba->hbalock, flags);
 	list_add_tail(&evtp->evt_listp, &phba->work_list);
-	if (phba->work_wait)
-		lpfc_worker_wake_up(phba);
 	spin_unlock_irqrestore(&phba->hbalock, flags);
 
+	lpfc_worker_wake_up(phba);
+
 	return 1;
 }
 
@@ -963,6 +917,10 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
 	if (phba->fc_topology == TOPOLOGY_LOOP) {
 		phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
 
+		if (phba->cfg_enable_npiv)
+			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
+				"1309 Link Up Event npiv not supported in loop "
+				"topology\n");
 				/* Get Loop Map information */
 		if (la->il)
 			vport->fc_flag |= FC_LBIT;
@@ -1087,6 +1045,8 @@ lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 	MAILBOX_t *mb = &pmb->mb;
 	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
 
+	/* Unblock ELS traffic */
+	phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
 	/* Check for error */
 	if (mb->mbxStatus) {
 		lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
@@ -1650,7 +1610,6 @@ lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		ndlp->nlp_DID, old_state, state);
 
 	if (old_state == NLP_STE_NPR_NODE &&
-	    (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 &&
 	    state != NLP_STE_NPR_NODE)
 		lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	if (old_state == NLP_STE_UNMAPPED_NODE) {
@@ -1687,8 +1646,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 {
 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 
-	if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
-		lpfc_cancel_retry_delay_tmo(vport, ndlp);
+	lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
 		lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
 	spin_lock_irq(shost->host_lock);
@@ -1701,8 +1659,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 static void
 lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 {
-	if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
-		lpfc_cancel_retry_delay_tmo(vport, ndlp);
+	lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
 		lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
 	lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
@@ -2121,10 +2078,8 @@ lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 	ndlp->nlp_last_elscmd = 0;
 	del_timer_sync(&ndlp->nlp_delayfunc);
 
-	if (!list_empty(&ndlp->els_retry_evt.evt_listp))
-		list_del_init(&ndlp->els_retry_evt.evt_listp);
-	if (!list_empty(&ndlp->dev_loss_evt.evt_listp))
-		list_del_init(&ndlp->dev_loss_evt.evt_listp);
+	list_del_init(&ndlp->els_retry_evt.evt_listp);
+	list_del_init(&ndlp->dev_loss_evt.evt_listp);
 
 	lpfc_unreg_rpi(vport, ndlp);
 
@@ -2144,10 +2099,7 @@ lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 	LPFC_MBOXQ_t *mbox;
 	int rc;
 
-	if (ndlp->nlp_flag & NLP_DELAY_TMO) {
-		lpfc_cancel_retry_delay_tmo(vport, ndlp);
-	}
-
+	lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) {
 		/* For this case we need to cleanup the default rpi
 		 * allocated by the firmware.
@@ -2317,8 +2269,7 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
 			/* Since this node is marked for discovery,
 			 * delay timeout is not needed.
 			 */
-			if (ndlp->nlp_flag & NLP_DELAY_TMO)
-				lpfc_cancel_retry_delay_tmo(vport, ndlp);
+			lpfc_cancel_retry_delay_tmo(vport, ndlp);
 		} else
 			ndlp = NULL;
 	} else {
@@ -2643,21 +2594,20 @@ lpfc_disc_timeout(unsigned long ptr)
 {
 	struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
 	struct lpfc_hba   *phba = vport->phba;
+	uint32_t tmo_posted;
 	unsigned long flags = 0;
 
 	if (unlikely(!phba))
 		return;
 
-	if ((vport->work_port_events & WORKER_DISC_TMO) == 0) {
-		spin_lock_irqsave(&vport->work_port_lock, flags);
+	spin_lock_irqsave(&vport->work_port_lock, flags);
+	tmo_posted = vport->work_port_events & WORKER_DISC_TMO;
+	if (!tmo_posted)
 		vport->work_port_events |= WORKER_DISC_TMO;
-		spin_unlock_irqrestore(&vport->work_port_lock, flags);
+	spin_unlock_irqrestore(&vport->work_port_lock, flags);
 
-		spin_lock_irqsave(&phba->hbalock, flags);
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
-		spin_unlock_irqrestore(&phba->hbalock, flags);
-	}
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
 	return;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index fa757b251f82..5b6e5395c8eb 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -145,8 +145,10 @@ lpfc_config_port_prep(struct lpfc_hba *phba)
 		return -ERESTART;
 	}
 
-	if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp)
+	if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) {
+		mempool_free(pmb, phba->mbox_mem_pool);
 		return -EINVAL;
+	}
 
 	/* Save information as VPD data */
 	vp->rev.rBit = 1;
@@ -551,18 +553,18 @@ static void
 lpfc_hb_timeout(unsigned long ptr)
 {
 	struct lpfc_hba *phba;
+	uint32_t tmo_posted;
 	unsigned long iflag;
 
 	phba = (struct lpfc_hba *)ptr;
 	spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
-	if (!(phba->pport->work_port_events & WORKER_HB_TMO))
+	tmo_posted = phba->pport->work_port_events & WORKER_HB_TMO;
+	if (!tmo_posted)
 		phba->pport->work_port_events |= WORKER_HB_TMO;
 	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);
 
-	spin_lock_irqsave(&phba->hbalock, iflag);
-	if (phba->work_wait)
-		wake_up(phba->work_wait);
-	spin_unlock_irqrestore(&phba->hbalock, iflag);
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
 	return;
 }
 
@@ -851,6 +853,8 @@ lpfc_handle_latt(struct lpfc_hba *phba)
 	lpfc_read_la(phba, pmb, mp);
 	pmb->mbox_cmpl = lpfc_mbx_cmpl_read_la;
 	pmb->vport = vport;
+	/* Block ELS IOCBs until we have processed this mbox command */
+	phba->sli.ring[LPFC_ELS_RING].flag |= LPFC_STOP_IOCB_EVENT;
 	rc = lpfc_sli_issue_mbox (phba, pmb, MBX_NOWAIT);
 	if (rc == MBX_NOT_FINISHED) {
 		rc = 4;
@@ -866,6 +870,7 @@ lpfc_handle_latt(struct lpfc_hba *phba)
 	return;
 
 lpfc_handle_latt_free_mbuf:
+	phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
 	lpfc_mbuf_free(phba, mp->virt, mp->phys);
 lpfc_handle_latt_free_mp:
 	kfree(mp);
@@ -1194,8 +1199,7 @@ lpfc_get_hba_model_desc(struct lpfc_hba *phba, uint8_t *mdp, uint8_t *descp)
 /*   Returns the number of buffers NOT posted.    */
 /**************************************************/
 int
-lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt,
-		 int type)
+lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt)
 {
 	IOCB_t *icmd;
 	struct lpfc_iocbq *iocb;
@@ -1295,7 +1299,7 @@ lpfc_post_rcv_buf(struct lpfc_hba *phba)
 	struct lpfc_sli *psli = &phba->sli;
 
 	/* Ring 0, ELS / CT buffers */
-	lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0, 1);
+	lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0);
 	/* Ring 2 - FCP no buffers needed */
 
 	return 0;
@@ -1454,6 +1458,15 @@ lpfc_cleanup(struct lpfc_vport *vport)
 
 		lpfc_disc_state_machine(vport, ndlp, NULL,
 					     NLP_EVT_DEVICE_RM);
+
+		/* nlp_type zero is not defined, nlp_flag zero also not defined,
+		 * nlp_state is unused, this happens when
+		 * an initiator has logged
+		 * into us so cleanup this ndlp.
+		 */
+		if ((ndlp->nlp_type == 0) && (ndlp->nlp_flag == 0) &&
+			(ndlp->nlp_state == 0))
+			lpfc_nlp_put(ndlp);
 	}
 
 	/* At this point, ALL ndlp's should be gone
@@ -2101,6 +2114,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
 	phba->work_ha_mask = (HA_ERATT|HA_MBATT|HA_LATT);
 	phba->work_ha_mask |= (HA_RXMASK << (LPFC_ELS_RING * 4));
 
+	/* Initialize the wait queue head for the kernel thread */
+	init_waitqueue_head(&phba->work_waitq);
+
 	/* Startup the kernel thread for this host adapter. */
 	phba->worker_thread = kthread_run(lpfc_do_work, phba,
 				       "lpfc_worker_%d", phba->brd_no);
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index d08c4c890744..6688a8689b56 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -235,10 +235,7 @@ lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 			(iocb->iocb_cmpl) (phba, iocb, iocb);
 		}
 	}
-
-	/* If we are delaying issuing an ELS command, cancel it */
-	if (ndlp->nlp_flag & NLP_DELAY_TMO)
-		lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
+	lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 	return 0;
 }
 
@@ -249,7 +246,6 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 	struct lpfc_hba    *phba = vport->phba;
 	struct lpfc_dmabuf *pcmd;
-	struct lpfc_work_evt *evtp;
 	uint32_t *lp;
 	IOCB_t *icmd;
 	struct serv_parm *sp;
@@ -425,73 +421,8 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 			ndlp, mbox);
 		return 1;
 	}
-
-	/* If the remote NPort logs into us, before we can initiate
-	 * discovery to them, cleanup the NPort from discovery accordingly.
-	 */
-	if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
-		spin_lock_irq(shost->host_lock);
-		ndlp->nlp_flag &= ~NLP_DELAY_TMO;
-		spin_unlock_irq(shost->host_lock);
-		del_timer_sync(&ndlp->nlp_delayfunc);
-		ndlp->nlp_last_elscmd = 0;
-
-		if (!list_empty(&ndlp->els_retry_evt.evt_listp)) {
-			list_del_init(&ndlp->els_retry_evt.evt_listp);
-			/* Decrement ndlp reference count held for the
-			 * delayed retry
-			 */
-			evtp = &ndlp->els_retry_evt;
-			lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
-		}
-
-		if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
-			spin_lock_irq(shost->host_lock);
-			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
-			spin_unlock_irq(shost->host_lock);
-
-			if ((ndlp->nlp_flag & NLP_ADISC_SND) &&
-			    (vport->num_disc_nodes)) {
-				/* Check to see if there are more
-				 * ADISCs to be sent
-				 */
-				lpfc_more_adisc(vport);
-
-				if ((vport->num_disc_nodes == 0) &&
-					(vport->fc_npr_cnt))
-					lpfc_els_disc_plogi(vport);
-
-				if (vport->num_disc_nodes == 0) {
-					spin_lock_irq(shost->host_lock);
-					vport->fc_flag &= ~FC_NDISC_ACTIVE;
-					spin_unlock_irq(shost->host_lock);
-					lpfc_can_disctmo(vport);
-					lpfc_end_rscn(vport);
-				}
-			}
-		}
-	} else if ((ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) &&
-		   (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
-		   (vport->num_disc_nodes)) {
-		spin_lock_irq(shost->host_lock);
-		ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
-		spin_unlock_irq(shost->host_lock);
-		/* Check to see if there are more
-		 * PLOGIs to be sent
-		 */
-		lpfc_more_plogi(vport);
-		if (vport->num_disc_nodes == 0) {
-			spin_lock_irq(shost->host_lock);
-			vport->fc_flag &= ~FC_NDISC_ACTIVE;
-			spin_unlock_irq(shost->host_lock);
-			lpfc_can_disctmo(vport);
-			lpfc_end_rscn(vport);
-		}
-	}
-
 	lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 	return 1;
-
 out:
 	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 	stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
@@ -574,7 +505,9 @@ lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	else
 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 
-	if (!(ndlp->nlp_type & NLP_FABRIC) ||
+	if ((!(ndlp->nlp_type & NLP_FABRIC) &&
+	     ((ndlp->nlp_type & NLP_FCP_TARGET) ||
+	      !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 	    (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 		/* Only try to re-login if this is NOT a Fabric Node */
 		mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
@@ -751,6 +684,7 @@ static uint32_t
 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 			   void *arg, uint32_t evt)
 {
+	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 	struct lpfc_hba   *phba = vport->phba;
 	struct lpfc_iocbq *cmdiocb = arg;
 	struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
@@ -776,7 +710,22 @@ lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 			NULL);
 	} else {
-		lpfc_rcv_plogi(vport, ndlp, cmdiocb);
+		if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
+		    (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
+		    (vport->num_disc_nodes)) {
+			spin_lock_irq(shost->host_lock);
+			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+			spin_unlock_irq(shost->host_lock);
+			/* Check if there are more PLOGIs to be sent */
+			lpfc_more_plogi(vport);
+			if (vport->num_disc_nodes == 0) {
+				spin_lock_irq(shost->host_lock);
+				vport->fc_flag &= ~FC_NDISC_ACTIVE;
+				spin_unlock_irq(shost->host_lock);
+				lpfc_can_disctmo(vport);
+				lpfc_end_rscn(vport);
+			}
+		}
 	} /* If our portname was less */
 
 	return ndlp->nlp_state;
@@ -1040,6 +989,7 @@ static uint32_t
 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 			   void *arg, uint32_t evt)
 {
+	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 	struct lpfc_hba   *phba = vport->phba;
 	struct lpfc_iocbq *cmdiocb;
 
@@ -1048,9 +998,28 @@ lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 
 	cmdiocb = (struct lpfc_iocbq *) arg;
 
-	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb))
-		return ndlp->nlp_state;
+	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
+		if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
+			spin_lock_irq(shost->host_lock);
+			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+			spin_unlock_irq(shost->host_lock);
 
+			if (vport->num_disc_nodes) {
+				lpfc_more_adisc(vport);
+				if ((vport->num_disc_nodes == 0) &&
+				    (vport->fc_npr_cnt))
+					lpfc_els_disc_plogi(vport);
+				if (vport->num_disc_nodes == 0) {
+					spin_lock_irq(shost->host_lock);
+					vport->fc_flag &= ~FC_NDISC_ACTIVE;
+					spin_unlock_irq(shost->host_lock);
+					lpfc_can_disctmo(vport);
+					lpfc_end_rscn(vport);
+				}
+			}
+		}
+		return ndlp->nlp_state;
+	}
 	ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
 	lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
 	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
@@ -1742,24 +1711,21 @@ lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
 
 	/* Ignore PLOGI if we have an outstanding LOGO */
-	if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC)) {
+	if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
 		return ndlp->nlp_state;
-	}
-
 	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
+		lpfc_cancel_retry_delay_tmo(vport, ndlp);
 		spin_lock_irq(shost->host_lock);
-		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
+		ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
 		spin_unlock_irq(shost->host_lock);
-		return ndlp->nlp_state;
-	}
-
-	/* send PLOGI immediately, move to PLOGI issue state */
-	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
-		ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
-		lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
-		lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
+	} else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
+		/* send PLOGI immediately, move to PLOGI issue state */
+		if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
+			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
+		}
 	}
-
 	return ndlp->nlp_state;
 }
 
@@ -1810,7 +1776,6 @@ lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 
 	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
-
 	/*
 	 * Do not start discovery if discovery is about to start
 	 * or discovery in progress for this node. Starting discovery
@@ -1973,9 +1938,7 @@ lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	spin_lock_irq(shost->host_lock);
 	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 	spin_unlock_irq(shost->host_lock);
-	if (ndlp->nlp_flag & NLP_DELAY_TMO) {
-		lpfc_cancel_retry_delay_tmo(vport, ndlp);
-	}
+	lpfc_cancel_retry_delay_tmo(vport, ndlp);
 	return ndlp->nlp_state;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 0910a9ab76a5..c94da4f2b8a6 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -50,6 +50,7 @@ void
 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
 {
 	unsigned long flags;
+	uint32_t evt_posted;
 
 	spin_lock_irqsave(&phba->hbalock, flags);
 	atomic_inc(&phba->num_rsrc_err);
@@ -65,17 +66,13 @@ lpfc_adjust_queue_depth(struct lpfc_hba *phba)
 	spin_unlock_irqrestore(&phba->hbalock, flags);
 
 	spin_lock_irqsave(&phba->pport->work_port_lock, flags);
-	if ((phba->pport->work_port_events &
-		WORKER_RAMP_DOWN_QUEUE) == 0) {
+	evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
+	if (!evt_posted)
 		phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
-	}
 	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 
-	spin_lock_irqsave(&phba->hbalock, flags);
-	if (phba->work_wait)
-		wake_up(phba->work_wait);
-	spin_unlock_irqrestore(&phba->hbalock, flags);
-
+	if (!evt_posted)
+		lpfc_worker_wake_up(phba);
 	return;
 }
 
@@ -89,6 +86,7 @@ lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 {
 	unsigned long flags;
 	struct lpfc_hba *phba = vport->phba;
+	uint32_t evt_posted;
 	atomic_inc(&phba->num_cmd_success);
 
 	if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
@@ -103,16 +101,14 @@ lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 	spin_unlock_irqrestore(&phba->hbalock, flags);
 
 	spin_lock_irqsave(&phba->pport->work_port_lock, flags);
-	if ((phba->pport->work_port_events &
-		WORKER_RAMP_UP_QUEUE) == 0) {
+	evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
+	if (!evt_posted)
 		phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
-	}
 	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 
-	spin_lock_irqsave(&phba->hbalock, flags);
-	if (phba->work_wait)
-		wake_up(phba->work_wait);
-	spin_unlock_irqrestore(&phba->hbalock, flags);
+	if (!evt_posted)
+		lpfc_worker_wake_up(phba);
+	return;
 }
 
 void
@@ -609,9 +605,6 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	result = cmd->result;
 	sdev = cmd->device;
 	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
-	spin_lock_irqsave(sdev->host->host_lock, flags);
-	lpfc_cmd->pCmd = NULL;	/* This must be done before scsi_done */
-	spin_unlock_irqrestore(sdev->host->host_lock, flags);
 	cmd->scsi_done(cmd);
 
 	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
@@ -620,6 +613,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 		 * wake up the thread.
 		 */
 		spin_lock_irqsave(sdev->host->host_lock, flags);
+		lpfc_cmd->pCmd = NULL;
 		if (lpfc_cmd->waitq)
 			wake_up(lpfc_cmd->waitq);
 		spin_unlock_irqrestore(sdev->host->host_lock, flags);
@@ -690,6 +684,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	 * wake up the thread.
 	 */
 	spin_lock_irqsave(sdev->host->host_lock, flags);
+	lpfc_cmd->pCmd = NULL;
 	if (lpfc_cmd->waitq)
 		wake_up(lpfc_cmd->waitq);
 	spin_unlock_irqrestore(sdev->host->host_lock, flags);
@@ -849,14 +844,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 	struct lpfc_iocbq *iocbq;
 	struct lpfc_iocbq *iocbqrsp;
 	int ret;
+	int status;
 
 	if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
 		return FAILED;
 
 	lpfc_cmd->rdata = rdata;
-	ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
+	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 					   FCP_TARGET_RESET);
-	if (!ret)
+	if (!status)
 		return FAILED;
 
 	iocbq = &lpfc_cmd->cur_iocbq;
@@ -869,12 +865,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 			 "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
 			 tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
-	ret = lpfc_sli_issue_iocb_wait(phba,
+	status = lpfc_sli_issue_iocb_wait(phba,
 				       &phba->sli.ring[phba->sli.fcp_ring],
 				       iocbq, iocbqrsp, lpfc_cmd->timeout);
-	if (ret != IOCB_SUCCESS) {
-		if (ret == IOCB_TIMEDOUT)
+	if (status != IOCB_SUCCESS) {
+		if (status == IOCB_TIMEDOUT) {
 			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
+			ret = TIMEOUT_ERROR;
+		} else
+			ret = FAILED;
 		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 	} else {
 		ret = SUCCESS;
@@ -1142,121 +1141,96 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
 	struct lpfc_iocbq *iocbq, *iocbqrsp;
 	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 	struct lpfc_nodelist *pnode = rdata->pnode;
-	uint32_t cmd_result = 0, cmd_status = 0;
-	int ret = FAILED;
-	int iocb_status = IOCB_SUCCESS;
-	int cnt, loopcnt;
+	unsigned long later;
+	int ret = SUCCESS;
+	int status;
+	int cnt;
 
 	lpfc_block_error_handler(cmnd);
-	loopcnt = 0;
 	/*
 	 * If target is not in a MAPPED state, delay the reset until
 	 * target is rediscovered or devloss timeout expires.
 	 */
-	while (1) {
+	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
+	while (time_after(later, jiffies)) {
 		if (!pnode || !NLP_CHK_NODE_ACT(pnode))
-			goto out;
-
-		if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
-			schedule_timeout_uninterruptible(msecs_to_jiffies(500));
-			loopcnt++;
-			rdata = cmnd->device->hostdata;
-			if (!rdata ||
-				(loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
-				lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
-						 "0721 LUN Reset rport "
-						 "failure: cnt x%x rdata x%p\n",
-						 loopcnt, rdata);
-				goto out;
-			}
-			pnode = rdata->pnode;
-			if (!pnode || !NLP_CHK_NODE_ACT(pnode))
-				goto out;
-		}
+			return FAILED;
 		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
 			break;
+		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
+		rdata = cmnd->device->hostdata;
+		if (!rdata)
+			break;
+		pnode = rdata->pnode;
+	}
+	if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
+				 "0721 LUN Reset rport "
+				 "failure: msec x%x rdata x%p\n",
+				 jiffies_to_msecs(jiffies - later), rdata);
+		return FAILED;
 	}
-
 	lpfc_cmd = lpfc_get_scsi_buf(phba);
 	if (lpfc_cmd == NULL)
-		goto out;
-
+		return FAILED;
 	lpfc_cmd->timeout = 60;
 	lpfc_cmd->rdata = rdata;
 
-	ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
-					   FCP_TARGET_RESET);
-	if (!ret)
-		goto out_free_scsi_buf;
-
+	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
+					      cmnd->device->lun,
+					      FCP_TARGET_RESET);
+	if (!status) {
+		lpfc_release_scsi_buf(phba, lpfc_cmd);
+		return FAILED;
+	}
 	iocbq = &lpfc_cmd->cur_iocbq;
 
 	/* get a buffer for this IOCB command response */
 	iocbqrsp = lpfc_sli_get_iocbq(phba);
-	if (iocbqrsp == NULL)
-		goto out_free_scsi_buf;
-
+	if (iocbqrsp == NULL) {
+		lpfc_release_scsi_buf(phba, lpfc_cmd);
+		return FAILED;
+	}
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 			 "0703 Issue target reset to TGT %d LUN %d "
 			 "rpi x%x nlp_flag x%x\n", cmnd->device->id,
 			 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
-	iocb_status = lpfc_sli_issue_iocb_wait(phba,
-				       &phba->sli.ring[phba->sli.fcp_ring],
-				       iocbq, iocbqrsp, lpfc_cmd->timeout);
-
-	if (iocb_status == IOCB_TIMEDOUT)
+	status = lpfc_sli_issue_iocb_wait(phba,
+					  &phba->sli.ring[phba->sli.fcp_ring],
+					  iocbq, iocbqrsp, lpfc_cmd->timeout);
+	if (status == IOCB_TIMEDOUT) {
 		iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
-
-	if (iocb_status == IOCB_SUCCESS)
-		ret = SUCCESS;
-	else
-		ret = iocb_status;
-
-	cmd_result = iocbqrsp->iocb.un.ulpWord[4];
-	cmd_status = iocbqrsp->iocb.ulpStatus;
-
+		ret = TIMEOUT_ERROR;
+	} else {
+		if (status != IOCB_SUCCESS)
+			ret = FAILED;
+		lpfc_release_scsi_buf(phba, lpfc_cmd);
+	}
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
+			 "0713 SCSI layer issued device reset (%d, %d) "
+			 "return x%x status x%x result x%x\n",
+			 cmnd->device->id, cmnd->device->lun, ret,
+			 iocbqrsp->iocb.ulpStatus,
+			 iocbqrsp->iocb.un.ulpWord[4]);
 	lpfc_sli_release_iocbq(phba, iocbqrsp);
-
-	/*
-	 * All outstanding txcmplq I/Os should have been aborted by the device.
-	 * Unfortunately, some targets do not abide by this forcing the driver
-	 * to double check.
-	 */
 	cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
-				LPFC_CTX_LUN);
+				LPFC_CTX_TGT);
 	if (cnt)
 		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
 				    cmnd->device->id, cmnd->device->lun,
-				    LPFC_CTX_LUN);
-	loopcnt = 0;
-	while(cnt) {
-		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
-
-		if (++loopcnt
-		    > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
-			break;
-
+				    LPFC_CTX_TGT);
+	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
+	while (time_after(later, jiffies) && cnt) {
+		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
 		cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
-					cmnd->device->lun, LPFC_CTX_LUN);
+					cmnd->device->lun, LPFC_CTX_TGT);
 	}
-
 	if (cnt) {
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
 				 "0719 device reset I/O flush failure: "
 				 "cnt x%x\n", cnt);
 		ret = FAILED;
 	}
-
-out_free_scsi_buf:
-	if (iocb_status != IOCB_TIMEDOUT) {
-		lpfc_release_scsi_buf(phba, lpfc_cmd);
-	}
-	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
-			 "0713 SCSI layer issued device reset (%d, %d) "
-			 "return x%x status x%x result x%x\n",
-			 cmnd->device->id, cmnd->device->lun, ret,
-			 cmd_status, cmd_result);
-out:
 	return ret;
 }
 
@@ -1268,19 +1242,12 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 	struct lpfc_hba   *phba = vport->phba;
 	struct lpfc_nodelist *ndlp = NULL;
 	int match;
-	int ret = FAILED, i, err_count = 0;
-	int cnt, loopcnt;
+	int ret = SUCCESS, status, i;
+	int cnt;
 	struct lpfc_scsi_buf * lpfc_cmd;
+	unsigned long later;
 
 	lpfc_block_error_handler(cmnd);
-
-	lpfc_cmd = lpfc_get_scsi_buf(phba);
-	if (lpfc_cmd == NULL)
-		goto out;
-
-	/* The lpfc_cmd storage is reused.  Set all loop invariants. */
-	lpfc_cmd->timeout = 60;
-
 	/*
 	 * Since the driver manages a single bus device, reset all
 	 * targets known to the driver.  Should any target reset
@@ -1294,7 +1261,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 			if (!NLP_CHK_NODE_ACT(ndlp))
 				continue;
 			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
-			    i == ndlp->nlp_sid &&
+			    ndlp->nlp_sid == i &&
 			    ndlp->rport) {
 				match = 1;
 				break;
@@ -1303,27 +1270,22 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 		spin_unlock_irq(shost->host_lock);
 		if (!match)
 			continue;
-
-		ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
-					  cmnd->device->lun,
-					  ndlp->rport->dd_data);
-		if (ret != SUCCESS) {
+		lpfc_cmd = lpfc_get_scsi_buf(phba);
+		if (lpfc_cmd) {
+			lpfc_cmd->timeout = 60;
+			status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
+						     cmnd->device->lun,
+						     ndlp->rport->dd_data);
+			if (status != TIMEOUT_ERROR)
+				lpfc_release_scsi_buf(phba, lpfc_cmd);
+		}
+		if (!lpfc_cmd || status != SUCCESS) {
 			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
 					 "0700 Bus Reset on target %d failed\n",
 					 i);
-			err_count++;
-			break;
+			ret = FAILED;
 		}
 	}
-
-	if (ret != IOCB_TIMEDOUT)
-		lpfc_release_scsi_buf(phba, lpfc_cmd);
-
-	if (err_count == 0)
-		ret = SUCCESS;
-	else
-		ret = FAILED;
-
 	/*
 	 * All outstanding txcmplq I/Os should have been aborted by
 	 * the targets.  Unfortunately, some targets do not abide by
@@ -1333,27 +1295,19 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 	if (cnt)
 		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
 				    0, 0, LPFC_CTX_HOST);
-	loopcnt = 0;
-	while(cnt) {
-		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
-
-		if (++loopcnt
-		    > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
-			break;
-
+	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
+	while (time_after(later, jiffies) && cnt) {
+		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
 		cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
 	}
-
 	if (cnt) {
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
 				 "0715 Bus Reset I/O flush failure: "
 				 "cnt x%x left x%x\n", cnt, i);
 		ret = FAILED;
 	}
-
 	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
 			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
-out:
 	return ret;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 70a0a9eab211..f40aa7b905f7 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -324,9 +324,7 @@ lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
 			phba->work_ha |= HA_ERATT;
 			phba->work_hs = HS_FFER3;
 
-			/* hbalock should already be held */
-			if (phba->work_wait)
-				lpfc_worker_wake_up(phba);
+			lpfc_worker_wake_up(phba);
 
 			return NULL;
 		}
@@ -1309,9 +1307,7 @@ lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
 	phba->work_ha |= HA_ERATT;
 	phba->work_hs = HS_FFER3;
 
-	/* hbalock should already be held */
-	if (phba->work_wait)
-		lpfc_worker_wake_up(phba);
+	lpfc_worker_wake_up(phba);
 
 	return;
 }
@@ -2611,12 +2607,9 @@ lpfc_mbox_timeout(unsigned long ptr)
 		phba->pport->work_port_events |= WORKER_MBOX_TMO;
 	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);
 
-	if (!tmo_posted) {
-		spin_lock_irqsave(&phba->hbalock, iflag);
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
-		spin_unlock_irqrestore(&phba->hbalock, iflag);
-	}
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
+	return;
 }
 
 void
@@ -3374,8 +3367,12 @@ lpfc_sli_host_down(struct lpfc_vport *vport)
 	for (i = 0; i < psli->num_rings; i++) {
 		pring = &psli->ring[i];
 		prev_pring_flag = pring->flag;
-		if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */
+		/* Only slow rings */
+		if (pring->ringno == LPFC_ELS_RING) {
 			pring->flag |= LPFC_DEFERRED_RING_EVENT;
+			/* Set the lpfc data pending flag */
+			set_bit(LPFC_DATA_READY, &phba->data_flags);
+		}
 		/*
 		 * Error everything on the txq since these iocbs have not been
 		 * given to the FW yet.
@@ -3434,8 +3431,12 @@ lpfc_sli_hba_down(struct lpfc_hba *phba)
 	spin_lock_irqsave(&phba->hbalock, flags);
 	for (i = 0; i < psli->num_rings; i++) {
 		pring = &psli->ring[i];
-		if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */
+		/* Only slow rings */
+		if (pring->ringno == LPFC_ELS_RING) {
 			pring->flag |= LPFC_DEFERRED_RING_EVENT;
+			/* Set the lpfc data pending flag */
+			set_bit(LPFC_DATA_READY, &phba->data_flags);
+		}
 
 		/*
 		 * Error everything on the txq since these iocbs have not been
@@ -3762,7 +3763,6 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport,
 			   lpfc_ctx_cmd ctx_cmd)
 {
 	struct lpfc_scsi_buf *lpfc_cmd;
-	struct scsi_cmnd *cmnd;
 	int rc = 1;
 
 	if (!(iocbq->iocb_flag &  LPFC_IO_FCP))
@@ -3772,19 +3772,20 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport,
 		return rc;
 
 	lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
-	cmnd = lpfc_cmd->pCmd;
 
-	if (cmnd == NULL)
+	if (lpfc_cmd->pCmd == NULL)
 		return rc;
 
 	switch (ctx_cmd) {
 	case LPFC_CTX_LUN:
-		if ((cmnd->device->id == tgt_id) &&
-		    (cmnd->device->lun == lun_id))
+		if ((lpfc_cmd->rdata->pnode) &&
+		    (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) &&
+		    (scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id))
 			rc = 0;
 		break;
 	case LPFC_CTX_TGT:
-		if (cmnd->device->id == tgt_id)
+		if ((lpfc_cmd->rdata->pnode) &&
+		    (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id))
 			rc = 0;
 		break;
 	case LPFC_CTX_HOST:
@@ -3994,6 +3995,7 @@ lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq,
 	if (pmboxq->context1)
 		return MBX_NOT_FINISHED;
 
+	pmboxq->mbox_flag &= ~LPFC_MBX_WAKE;
 	/* setup wake call as IOCB callback */
 	pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait;
 	/* setup context field to pass wait_queue pointer to wake function  */
@@ -4159,7 +4161,7 @@ lpfc_intr_handler(int irq, void *dev_id)
 						"pwork:x%x hawork:x%x wait:x%x",
 						phba->work_ha, work_ha_copy,
 						(uint32_t)((unsigned long)
-						phba->work_wait));
+						&phba->work_waitq));
 
 					control &=
 					    ~(HC_R0INT_ENA << LPFC_ELS_RING);
@@ -4172,7 +4174,7 @@ lpfc_intr_handler(int irq, void *dev_id)
 						"x%x hawork:x%x wait:x%x",
 						phba->work_ha, work_ha_copy,
 						(uint32_t)((unsigned long)
-						phba->work_wait));
+						&phba->work_waitq));
 				}
 				spin_unlock(&phba->hbalock);
 			}
@@ -4297,9 +4299,8 @@ send_current_mbox:
 
 		spin_lock(&phba->hbalock);
 		phba->work_ha |= work_ha_copy;
-		if (phba->work_wait)
-			lpfc_worker_wake_up(phba);
 		spin_unlock(&phba->hbalock);
+		lpfc_worker_wake_up(phba);
 	}
 
 	ha_copy &= ~(phba->work_ha_mask);
diff --git a/drivers/scsi/lpfc/lpfc_version.h b/drivers/scsi/lpfc/lpfc_version.h
index b22b893019f4..ad24cacfbe10 100644
--- a/drivers/scsi/lpfc/lpfc_version.h
+++ b/drivers/scsi/lpfc/lpfc_version.h
@@ -18,7 +18,7 @@
  * included with this package.                                     *
  *******************************************************************/
 
-#define LPFC_DRIVER_VERSION "8.2.6"
+#define LPFC_DRIVER_VERSION "8.2.7"
 
 #define LPFC_DRIVER_NAME "lpfc"
 
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index 6feaf59b0b1b..109f89d98830 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -216,6 +216,7 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 	int vpi;
 	int rc = VPORT_ERROR;
 	int status;
+	int size;
 
 	if ((phba->sli_rev < 3) ||
 		!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
@@ -278,7 +279,20 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 
 	memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
 	memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
-
+	size = strnlen(fc_vport->symbolic_name, LPFC_VNAME_LEN);
+	if (size) {
+		vport->vname = kzalloc(size+1, GFP_KERNEL);
+		if (!vport->vname) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+					 "1814 Create VPORT failed. "
+					 "vname allocation failed.\n");
+			rc = VPORT_ERROR;
+			lpfc_free_vpi(phba, vpi);
+			destroy_port(vport);
+			goto error_out;
+		}
+		memcpy(vport->vname, fc_vport->symbolic_name, size+1);
+	}
 	if (fc_vport->node_name != 0)
 		u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 	if (fc_vport->port_name != 0)
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index fd63b06d9ef1..11aa917629ac 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1765,7 +1765,7 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg)
 	default:
 		return 0;
 	}
-	if (mesg.event == mdev->ofdev.dev.power.power_state.event)
+	if (ms->phase == sleeping)
 		return 0;
 
 	scsi_block_requests(ms->host);
@@ -1780,8 +1780,6 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg)
 	disable_irq(ms->meshintr);
 	set_mesh_power(ms, 0);
 
-	mdev->ofdev.dev.power.power_state = mesg;
-
 	return 0;
 }
 
@@ -1790,7 +1788,7 @@ static int mesh_resume(struct macio_dev *mdev)
 	struct mesh_state *ms = (struct mesh_state *)macio_get_drvdata(mdev);
 	unsigned long flags;
 
-	if (mdev->ofdev.dev.power.power_state.event == PM_EVENT_ON)
+	if (ms->phase != sleeping)
 		return 0;
 
 	set_mesh_power(ms, 1);
@@ -1801,8 +1799,6 @@ static int mesh_resume(struct macio_dev *mdev)
 	enable_irq(ms->meshintr);
 	scsi_unblock_requests(ms->host);
 
-	mdev->ofdev.dev.power.power_state.event = PM_EVENT_ON;
-
 	return 0;
 }
 
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 0c786944d2c2..5822dd595826 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -113,9 +113,6 @@ static struct iscsi_transport qla4xxx_iscsi_transport = {
 	.host_param_mask	= ISCSI_HOST_HWADDRESS |
 				  ISCSI_HOST_IPADDRESS |
 				  ISCSI_HOST_INITIATOR_NAME,
-	.sessiondata_size	= sizeof(struct ddb_entry),
-	.host_template		= &qla4xxx_driver_template,
-
 	.tgt_dscvr		= qla4xxx_tgt_dscvr,
 	.get_conn_param		= qla4xxx_conn_get_param,
 	.get_session_param	= qla4xxx_sess_get_param,
@@ -275,7 +272,7 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
 		return err;
 	}
 
-	ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
+	ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
 	if (!ddb_entry->conn) {
 		iscsi_remove_session(ddb_entry->sess);
 		DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
@@ -292,7 +289,8 @@ struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
 	struct ddb_entry *ddb_entry;
 	struct iscsi_cls_session *sess;
 
-	sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
+	sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
+				   sizeof(struct ddb_entry));
 	if (!sess)
 		return NULL;
 
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 110e776d1a07..36c92f961e15 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -855,9 +855,18 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
 
 	good_bytes = scsi_bufflen(cmd);
         if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) {
+		int old_good_bytes = good_bytes;
 		drv = scsi_cmd_to_driver(cmd);
 		if (drv->done)
 			good_bytes = drv->done(cmd);
+		/*
+		 * USB may not give sense identifying bad sector and
+		 * simply return a residue instead, so subtract off the
+		 * residue if drv->done() error processing indicates no
+		 * change to the completion length.
+		 */
+		if (good_bytes == old_good_bytes)
+			good_bytes -= scsi_get_resid(cmd);
 	}
 	scsi_io_completion(cmd, good_bytes);
 }
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index f6600bfb5bde..01d11a01ffbf 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -94,6 +94,7 @@ static const char * scsi_debug_version_date = "20070104";
 #define DEF_VIRTUAL_GB   0
 #define DEF_FAKE_RW	0
 #define DEF_VPD_USE_HOSTNO 1
+#define DEF_SECTOR_SIZE 512
 
 /* bit mask values for scsi_debug_opts */
 #define SCSI_DEBUG_OPT_NOISE   1
@@ -142,6 +143,7 @@ static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
 static int scsi_debug_fake_rw = DEF_FAKE_RW;
 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
+static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
 
 static int scsi_debug_cmnd_count = 0;
 
@@ -157,11 +159,6 @@ static int sdebug_heads;		/* heads per disk */
 static int sdebug_cylinders_per;	/* cylinders per surface */
 static int sdebug_sectors_per;		/* sectors per cylinder */
 
-/* default sector size is 512 bytes, 2**9 bytes */
-#define POW2_SECT_SIZE 9
-#define SECT_SIZE (1 << POW2_SECT_SIZE)
-#define SECT_SIZE_PER(TGT) SECT_SIZE
-
 #define SDEBUG_MAX_PARTS 4
 
 #define SDEBUG_SENSE_LEN 32
@@ -646,6 +643,14 @@ static int inquiry_evpd_b0(unsigned char * arr)
 	return sizeof(vpdb0_data);
 }
 
+static int inquiry_evpd_b1(unsigned char *arr)
+{
+	memset(arr, 0, 0x3c);
+	arr[0] = 0;
+	arr[1] = 1;
+
+	return 0x3c;
+}
 
 #define SDEBUG_LONG_INQ_SZ 96
 #define SDEBUG_MAX_INQ_ARR_SZ 584
@@ -701,6 +706,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
 			arr[n++] = 0x88;  /* SCSI ports */
 			arr[n++] = 0x89;  /* ATA information */
 			arr[n++] = 0xb0;  /* Block limits (SBC) */
+			arr[n++] = 0xb1;  /* Block characteristics (SBC) */
 			arr[3] = n - 4;	  /* number of supported VPD pages */
 		} else if (0x80 == cmd[2]) { /* unit serial number */
 			arr[1] = cmd[2];	/*sanity */
@@ -740,6 +746,9 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
 		} else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
 			arr[1] = cmd[2];        /*sanity */
 			arr[3] = inquiry_evpd_b0(&arr[4]);
+		} else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
+			arr[1] = cmd[2];        /*sanity */
+			arr[3] = inquiry_evpd_b1(&arr[4]);
 		} else {
 			/* Illegal request, invalid field in cdb */
 			mk_sense_buffer(devip, ILLEGAL_REQUEST,
@@ -878,8 +887,8 @@ static int resp_readcap(struct scsi_cmnd * scp,
 		arr[2] = 0xff;
 		arr[3] = 0xff;
 	}
-	arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
-	arr[7] = SECT_SIZE_PER(target) & 0xff;
+	arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
+	arr[7] = scsi_debug_sector_size & 0xff;
 	return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
 }
 
@@ -902,10 +911,10 @@ static int resp_readcap16(struct scsi_cmnd * scp,
 	capac = sdebug_capacity - 1;
 	for (k = 0; k < 8; ++k, capac >>= 8)
 		arr[7 - k] = capac & 0xff;
-	arr[8] = (SECT_SIZE_PER(target) >> 24) & 0xff;
-	arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff;
-	arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff;
-	arr[11] = SECT_SIZE_PER(target) & 0xff;
+	arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
+	arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
+	arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
+	arr[11] = scsi_debug_sector_size & 0xff;
 	return fill_from_dev_buffer(scp, arr,
 				    min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
 }
@@ -1019,20 +1028,20 @@ static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
 
 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
 {       /* Format device page for mode_sense */
-        unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
-                                     0, 0, 0, 0, 0, 0, 0, 0,
-                                     0, 0, 0, 0, 0x40, 0, 0, 0};
-
-        memcpy(p, format_pg, sizeof(format_pg));
-        p[10] = (sdebug_sectors_per >> 8) & 0xff;
-        p[11] = sdebug_sectors_per & 0xff;
-        p[12] = (SECT_SIZE >> 8) & 0xff;
-        p[13] = SECT_SIZE & 0xff;
-        if (DEV_REMOVEABLE(target))
-                p[20] |= 0x20; /* should agree with INQUIRY */
-        if (1 == pcontrol)
-                memset(p + 2, 0, sizeof(format_pg) - 2);
-        return sizeof(format_pg);
+	unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0, 0, 0, 0,
+				     0, 0, 0, 0, 0x40, 0, 0, 0};
+
+	memcpy(p, format_pg, sizeof(format_pg));
+	p[10] = (sdebug_sectors_per >> 8) & 0xff;
+	p[11] = sdebug_sectors_per & 0xff;
+	p[12] = (scsi_debug_sector_size >> 8) & 0xff;
+	p[13] = scsi_debug_sector_size & 0xff;
+	if (DEV_REMOVEABLE(target))
+		p[20] |= 0x20; /* should agree with INQUIRY */
+	if (1 == pcontrol)
+		memset(p + 2, 0, sizeof(format_pg) - 2);
+	return sizeof(format_pg);
 }
 
 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
@@ -1206,8 +1215,8 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
 			ap[2] = (sdebug_capacity >> 8) & 0xff;
 			ap[3] = sdebug_capacity & 0xff;
 		}
-        	ap[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
-        	ap[7] = SECT_SIZE_PER(target) & 0xff;
+		ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
+		ap[7] = scsi_debug_sector_size & 0xff;
 		offset += bd_len;
 		ap = arr + offset;
 	} else if (16 == bd_len) {
@@ -1215,10 +1224,10 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
 
         	for (k = 0; k < 8; ++k, capac >>= 8)
                 	ap[7 - k] = capac & 0xff;
-        	ap[12] = (SECT_SIZE_PER(target) >> 24) & 0xff;
-        	ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff;
-        	ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff;
-        	ap[15] = SECT_SIZE_PER(target) & 0xff;
+		ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
+		ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
+		ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
+		ap[15] = scsi_debug_sector_size & 0xff;
 		offset += bd_len;
 		ap = arr + offset;
 	}
@@ -1519,10 +1528,10 @@ static int do_device_access(struct scsi_cmnd *scmd,
 	if (block + num > sdebug_store_sectors)
 		rest = block + num - sdebug_store_sectors;
 
-	ret = func(scmd, fake_storep + (block * SECT_SIZE),
-		   (num - rest) * SECT_SIZE);
+	ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
+		   (num - rest) * scsi_debug_sector_size);
 	if (!ret && rest)
-		ret = func(scmd, fake_storep, rest * SECT_SIZE);
+		ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
 
 	return ret;
 }
@@ -1575,10 +1584,10 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
 	write_unlock_irqrestore(&atomic_rw, iflags);
 	if (-1 == ret)
 		return (DID_ERROR << 16);
-	else if ((ret < (num * SECT_SIZE)) &&
+	else if ((ret < (num * scsi_debug_sector_size)) &&
 		 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
 		printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
-		       " IO sent=%d bytes\n", num * SECT_SIZE, ret);
+		       " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
 	return 0;
 }
 
@@ -2085,6 +2094,7 @@ module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
 		   S_IRUGO | S_IWUSR);
+module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
 
 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
 MODULE_DESCRIPTION("SCSI debug adapter driver");
@@ -2106,6 +2116,7 @@ MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
+MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)");
 
 
 static char sdebug_info[256];
@@ -2158,8 +2169,9 @@ static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **sta
 	    scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
 	    scsi_debug_cmnd_count, scsi_debug_delay,
 	    scsi_debug_max_luns, scsi_debug_scsi_level,
-	    SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
-	    num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
+	    scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
+	    sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
+	    num_host_resets);
 	if (pos < offset) {
 		len = 0;
 		begin = pos;
@@ -2434,6 +2446,12 @@ static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
 DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
 	    sdebug_vpd_use_hostno_store);
 
+static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
+{
+	return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
+}
+DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
+
 /* Note: The following function creates attribute files in the
    /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
    files (over those found in the /sys/module/scsi_debug/parameters
@@ -2459,11 +2477,13 @@ static int do_create_driverfs_files(void)
 	ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
 	ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
 	ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
+	ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
 	return ret;
 }
 
 static void do_remove_driverfs_files(void)
 {
+	driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
 	driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
 	driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
 	driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
@@ -2499,10 +2519,22 @@ static int __init scsi_debug_init(void)
 	int k;
 	int ret;
 
+	switch (scsi_debug_sector_size) {
+	case  512:
+	case 1024:
+	case 2048:
+	case 4096:
+		break;
+	default:
+		printk(KERN_ERR "scsi_debug_init: invalid sector_size %u\n",
+		       scsi_debug_sector_size);
+		return -EINVAL;
+	}
+
 	if (scsi_debug_dev_size_mb < 1)
 		scsi_debug_dev_size_mb = 1;  /* force minimum 1 MB ramdisk */
 	sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
-	sdebug_store_sectors = sz / SECT_SIZE;
+	sdebug_store_sectors = sz / scsi_debug_sector_size;
 	sdebug_capacity = get_sdebug_capacity();
 
 	/* play around with geometry, don't waste too much on track 0 */
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index eaf5a8add1ba..006a95916f72 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -298,6 +298,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,
  */
 static int scsi_check_sense(struct scsi_cmnd *scmd)
 {
+	struct scsi_device *sdev = scmd->device;
 	struct scsi_sense_hdr sshdr;
 
 	if (! scsi_command_normalize_sense(scmd, &sshdr))
@@ -306,6 +307,16 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 	if (scsi_sense_is_deferred(&sshdr))
 		return NEEDS_RETRY;
 
+	if (sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh &&
+			sdev->scsi_dh_data->scsi_dh->check_sense) {
+		int rc;
+
+		rc = sdev->scsi_dh_data->scsi_dh->check_sense(sdev, &sshdr);
+		if (rc != SCSI_RETURN_NOT_HANDLED)
+			return rc;
+		/* handler does not care. Drop down to default handling */
+	}
+
 	/*
 	 * Previous logic looked for FILEMARK, EOM or ILI which are
 	 * mainly associated with tapes and returned SUCCESS.
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index cbf55d59a54c..88d1b5f44e59 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -65,7 +65,7 @@ static struct scsi_host_sg_pool scsi_sg_pools[] = {
 };
 #undef SP
 
-static struct kmem_cache *scsi_bidi_sdb_cache;
+static struct kmem_cache *scsi_sdb_cache;
 
 static void scsi_run_queue(struct request_queue *q);
 
@@ -784,7 +784,7 @@ void scsi_release_buffers(struct scsi_cmnd *cmd)
 		struct scsi_data_buffer *bidi_sdb =
 			cmd->request->next_rq->special;
 		scsi_free_sgtable(bidi_sdb);
-		kmem_cache_free(scsi_bidi_sdb_cache, bidi_sdb);
+		kmem_cache_free(scsi_sdb_cache, bidi_sdb);
 		cmd->request->next_rq->special = NULL;
 	}
 }
@@ -1059,7 +1059,7 @@ int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask)
 
 	if (blk_bidi_rq(cmd->request)) {
 		struct scsi_data_buffer *bidi_sdb = kmem_cache_zalloc(
-			scsi_bidi_sdb_cache, GFP_ATOMIC);
+			scsi_sdb_cache, GFP_ATOMIC);
 		if (!bidi_sdb) {
 			error = BLKPREP_DEFER;
 			goto err_exit;
@@ -1169,6 +1169,14 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req)
 
 	if (ret != BLKPREP_OK)
 		return ret;
+
+	if (unlikely(sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh
+			 && sdev->scsi_dh_data->scsi_dh->prep_fn)) {
+		ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req);
+		if (ret != BLKPREP_OK)
+			return ret;
+	}
+
 	/*
 	 * Filesystem requests must transfer data.
 	 */
@@ -1329,7 +1337,6 @@ static inline int scsi_host_queue_ready(struct request_queue *q,
 				printk("scsi%d unblocking host at zero depth\n",
 					shost->host_no));
 		} else {
-			blk_plug_device(q);
 			return 0;
 		}
 	}
@@ -1693,11 +1700,11 @@ int __init scsi_init_queue(void)
 		return -ENOMEM;
 	}
 
-	scsi_bidi_sdb_cache = kmem_cache_create("scsi_bidi_sdb",
-					sizeof(struct scsi_data_buffer),
-					0, 0, NULL);
-	if (!scsi_bidi_sdb_cache) {
-		printk(KERN_ERR "SCSI: can't init scsi bidi sdb cache\n");
+	scsi_sdb_cache = kmem_cache_create("scsi_data_buffer",
+					   sizeof(struct scsi_data_buffer),
+					   0, 0, NULL);
+	if (!scsi_sdb_cache) {
+		printk(KERN_ERR "SCSI: can't init scsi sdb cache\n");
 		goto cleanup_io_context;
 	}
 
@@ -1710,7 +1717,7 @@ int __init scsi_init_queue(void)
 		if (!sgp->slab) {
 			printk(KERN_ERR "SCSI: can't init sg slab %s\n",
 					sgp->name);
-			goto cleanup_bidi_sdb;
+			goto cleanup_sdb;
 		}
 
 		sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE,
@@ -1718,13 +1725,13 @@ int __init scsi_init_queue(void)
 		if (!sgp->pool) {
 			printk(KERN_ERR "SCSI: can't init sg mempool %s\n",
 					sgp->name);
-			goto cleanup_bidi_sdb;
+			goto cleanup_sdb;
 		}
 	}
 
 	return 0;
 
-cleanup_bidi_sdb:
+cleanup_sdb:
 	for (i = 0; i < SG_MEMPOOL_NR; i++) {
 		struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
 		if (sgp->pool)
@@ -1732,7 +1739,7 @@ cleanup_bidi_sdb:
 		if (sgp->slab)
 			kmem_cache_destroy(sgp->slab);
 	}
-	kmem_cache_destroy(scsi_bidi_sdb_cache);
+	kmem_cache_destroy(scsi_sdb_cache);
 cleanup_io_context:
 	kmem_cache_destroy(scsi_io_context_cache);
 
@@ -1744,7 +1751,7 @@ void scsi_exit_queue(void)
 	int i;
 
 	kmem_cache_destroy(scsi_io_context_cache);
-	kmem_cache_destroy(scsi_bidi_sdb_cache);
+	kmem_cache_destroy(scsi_sdb_cache);
 
 	for (i = 0; i < SG_MEMPOOL_NR; i++) {
 		struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index a00eee6f7be9..196fe3af0d5e 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -346,7 +346,7 @@ static void scsi_target_dev_release(struct device *dev)
 	put_device(parent);
 }
 
-struct device_type scsi_target_type = {
+static struct device_type scsi_target_type = {
 	.name =		"scsi_target",
 	.release =	scsi_target_dev_release,
 };
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 93d2b6714453..b6e561059779 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -439,6 +439,7 @@ struct bus_type scsi_bus_type = {
 	.resume		= scsi_bus_resume,
 	.remove		= scsi_bus_remove,
 };
+EXPORT_SYMBOL_GPL(scsi_bus_type);
 
 int scsi_sysfs_register(void)
 {
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 65d1737eb664..3af7cbcc5c5d 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -30,10 +30,11 @@
 #include <scsi/scsi_transport_iscsi.h>
 #include <scsi/iscsi_if.h>
 
-#define ISCSI_SESSION_ATTRS 19
+#define ISCSI_SESSION_ATTRS 21
 #define ISCSI_CONN_ATTRS 13
 #define ISCSI_HOST_ATTRS 4
-#define ISCSI_TRANSPORT_VERSION "2.0-869"
+
+#define ISCSI_TRANSPORT_VERSION "2.0-870"
 
 struct iscsi_internal {
 	int daemon_pid;
@@ -101,16 +102,10 @@ show_transport_##name(struct device *dev, 				\
 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
 
 show_transport_attr(caps, "0x%x");
-show_transport_attr(max_lun, "%d");
-show_transport_attr(max_conn, "%d");
-show_transport_attr(max_cmd_len, "%d");
 
 static struct attribute *iscsi_transport_attrs[] = {
 	&dev_attr_handle.attr,
 	&dev_attr_caps.attr,
-	&dev_attr_max_lun.attr,
-	&dev_attr_max_conn.attr,
-	&dev_attr_max_cmd_len.attr,
 	NULL,
 };
 
@@ -118,18 +113,139 @@ static struct attribute_group iscsi_transport_group = {
 	.attrs = iscsi_transport_attrs,
 };
 
+/*
+ * iSCSI endpoint attrs
+ */
+#define iscsi_dev_to_endpoint(_dev) \
+	container_of(_dev, struct iscsi_endpoint, dev)
+
+#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)	\
+struct device_attribute dev_attr_##_prefix##_##_name =	\
+        __ATTR(_name,_mode,_show,_store)
+
+static void iscsi_endpoint_release(struct device *dev)
+{
+	struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+	kfree(ep);
+}
+
+static struct class iscsi_endpoint_class = {
+	.name = "iscsi_endpoint",
+	.dev_release = iscsi_endpoint_release,
+};
+
+static ssize_t
+show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+	return sprintf(buf, "%u\n", ep->id);
+}
+static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
+
+static struct attribute *iscsi_endpoint_attrs[] = {
+	&dev_attr_ep_handle.attr,
+	NULL,
+};
+
+static struct attribute_group iscsi_endpoint_group = {
+	.attrs = iscsi_endpoint_attrs,
+};
 
+#define ISCSI_MAX_EPID -1
+
+static int iscsi_match_epid(struct device *dev, void *data)
+{
+	struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+	unsigned int *epid = (unsigned int *) data;
+
+	return *epid == ep->id;
+}
+
+struct iscsi_endpoint *
+iscsi_create_endpoint(int dd_size)
+{
+	struct device *dev;
+	struct iscsi_endpoint *ep;
+	unsigned int id;
+	int err;
+
+	for (id = 1; id < ISCSI_MAX_EPID; id++) {
+		dev = class_find_device(&iscsi_endpoint_class, &id,
+					iscsi_match_epid);
+		if (!dev)
+			break;
+	}
+	if (id == ISCSI_MAX_EPID) {
+		printk(KERN_ERR "Too many connections. Max supported %u\n",
+		       ISCSI_MAX_EPID - 1);
+		return NULL;
+	}
+
+	ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
+	if (!ep)
+		return NULL;
+
+	ep->id = id;
+	ep->dev.class = &iscsi_endpoint_class;
+	snprintf(ep->dev.bus_id, BUS_ID_SIZE, "ep-%u", id);
+	err = device_register(&ep->dev);
+        if (err)
+                goto free_ep;
+
+	err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
+	if (err)
+		goto unregister_dev;
+
+	if (dd_size)
+		ep->dd_data = &ep[1];
+	return ep;
+
+unregister_dev:
+	device_unregister(&ep->dev);
+	return NULL;
+
+free_ep:
+	kfree(ep);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
+
+void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
+{
+	sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
+	device_unregister(&ep->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
+
+struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
+{
+	struct iscsi_endpoint *ep;
+	struct device *dev;
+
+	dev = class_find_device(&iscsi_endpoint_class, &handle,
+				iscsi_match_epid);
+	if (!dev)
+		return NULL;
+
+	ep = iscsi_dev_to_endpoint(dev);
+	/*
+	 * we can drop this now because the interface will prevent
+	 * removals and lookups from racing.
+	 */
+	put_device(dev);
+	return ep;
+}
+EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
 
 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
 			    struct device *cdev)
 {
 	struct Scsi_Host *shost = dev_to_shost(dev);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 
 	memset(ihost, 0, sizeof(*ihost));
-	INIT_LIST_HEAD(&ihost->sessions);
-	mutex_init(&ihost->mutex);
 	atomic_set(&ihost->nr_scans, 0);
+	mutex_init(&ihost->mutex);
 
 	snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d",
 		shost->host_no);
@@ -144,7 +260,7 @@ static int iscsi_remove_host(struct transport_container *tc, struct device *dev,
 			     struct device *cdev)
 {
 	struct Scsi_Host *shost = dev_to_shost(dev);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 
 	destroy_workqueue(ihost->scan_workq);
 	return 0;
@@ -287,6 +403,24 @@ static int iscsi_is_session_dev(const struct device *dev)
 	return dev->release == iscsi_session_release;
 }
 
+static int iscsi_iter_session_fn(struct device *dev, void *data)
+{
+	void (* fn) (struct iscsi_cls_session *) = data;
+
+	if (!iscsi_is_session_dev(dev))
+		return 0;
+	fn(iscsi_dev_to_session(dev));
+	return 0;
+}
+
+void iscsi_host_for_each_session(struct Scsi_Host *shost,
+				 void (*fn)(struct iscsi_cls_session *))
+{
+	device_for_each_child(&shost->shost_gendev, fn,
+			      iscsi_iter_session_fn);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
+
 /**
  * iscsi_scan_finished - helper to report when running scans are done
  * @shost: scsi host
@@ -297,7 +431,7 @@ static int iscsi_is_session_dev(const struct device *dev)
  */
 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
 {
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 	/*
 	 * qla4xxx will have kicked off some session unblocks before calling
 	 * scsi_scan_host, so just wait for them to complete.
@@ -306,42 +440,76 @@ int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
 }
 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
 
-static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
-			   uint id, uint lun)
+struct iscsi_scan_data {
+	unsigned int channel;
+	unsigned int id;
+	unsigned int lun;
+};
+
+static int iscsi_user_scan_session(struct device *dev, void *data)
 {
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_scan_data *scan_data = data;
 	struct iscsi_cls_session *session;
+	struct Scsi_Host *shost;
+	struct iscsi_cls_host *ihost;
+	unsigned long flags;
+	unsigned int id;
+
+	if (!iscsi_is_session_dev(dev))
+		return 0;
+
+	session = iscsi_dev_to_session(dev);
+	shost = iscsi_session_to_shost(session);
+	ihost = shost->shost_data;
 
 	mutex_lock(&ihost->mutex);
-	list_for_each_entry(session, &ihost->sessions, host_list) {
-		if ((channel == SCAN_WILD_CARD || channel == 0) &&
-		    (id == SCAN_WILD_CARD || id == session->target_id))
-			scsi_scan_target(&session->dev, 0,
-					 session->target_id, lun, 1);
+	spin_lock_irqsave(&session->lock, flags);
+	if (session->state != ISCSI_SESSION_LOGGED_IN) {
+		spin_unlock_irqrestore(&session->lock, flags);
+		mutex_unlock(&ihost->mutex);
+		return 0;
 	}
-	mutex_unlock(&ihost->mutex);
+	id = session->target_id;
+	spin_unlock_irqrestore(&session->lock, flags);
 
+	if (id != ISCSI_MAX_TARGET) {
+		if ((scan_data->channel == SCAN_WILD_CARD ||
+		     scan_data->channel == 0) &&
+		    (scan_data->id == SCAN_WILD_CARD ||
+		     scan_data->id == id))
+			scsi_scan_target(&session->dev, 0, id,
+					 scan_data->lun, 1);
+	}
+	mutex_unlock(&ihost->mutex);
 	return 0;
 }
 
+static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
+			   uint id, uint lun)
+{
+	struct iscsi_scan_data scan_data;
+
+	scan_data.channel = channel;
+	scan_data.id = id;
+	scan_data.lun = lun;
+
+	return device_for_each_child(&shost->shost_gendev, &scan_data,
+				     iscsi_user_scan_session);
+}
+
 static void iscsi_scan_session(struct work_struct *work)
 {
 	struct iscsi_cls_session *session =
 			container_of(work, struct iscsi_cls_session, scan_work);
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost = shost->shost_data;
-	unsigned long flags;
+	struct iscsi_cls_host *ihost = shost->shost_data;
+	struct iscsi_scan_data scan_data;
 
-	spin_lock_irqsave(&session->lock, flags);
-	if (session->state != ISCSI_SESSION_LOGGED_IN) {
-		spin_unlock_irqrestore(&session->lock, flags);
-		goto done;
-	}
-	spin_unlock_irqrestore(&session->lock, flags);
+	scan_data.channel = 0;
+	scan_data.id = SCAN_WILD_CARD;
+	scan_data.lun = SCAN_WILD_CARD;
 
-	scsi_scan_target(&session->dev, 0, session->target_id,
-			 SCAN_WILD_CARD, 1);
-done:
+	iscsi_user_scan_session(&session->dev, &scan_data);
 	atomic_dec(&ihost->nr_scans);
 }
 
@@ -381,7 +549,7 @@ static void __iscsi_unblock_session(struct work_struct *work)
 			container_of(work, struct iscsi_cls_session,
 				     unblock_work);
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 	unsigned long flags;
 
 	/*
@@ -449,15 +617,19 @@ static void __iscsi_unbind_session(struct work_struct *work)
 			container_of(work, struct iscsi_cls_session,
 				     unbind_work);
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
+	unsigned long flags;
 
 	/* Prevent new scans and make sure scanning is not in progress */
 	mutex_lock(&ihost->mutex);
-	if (list_empty(&session->host_list)) {
+	spin_lock_irqsave(&session->lock, flags);
+	if (session->target_id == ISCSI_MAX_TARGET) {
+		spin_unlock_irqrestore(&session->lock, flags);
 		mutex_unlock(&ihost->mutex);
 		return;
 	}
-	list_del_init(&session->host_list);
+	session->target_id = ISCSI_MAX_TARGET;
+	spin_unlock_irqrestore(&session->lock, flags);
 	mutex_unlock(&ihost->mutex);
 
 	scsi_remove_target(&session->dev);
@@ -467,18 +639,18 @@ static void __iscsi_unbind_session(struct work_struct *work)
 static int iscsi_unbind_session(struct iscsi_cls_session *session)
 {
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 
 	return queue_work(ihost->scan_workq, &session->unbind_work);
 }
 
 struct iscsi_cls_session *
-iscsi_alloc_session(struct Scsi_Host *shost,
-		    struct iscsi_transport *transport)
+iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
+		    int dd_size)
 {
 	struct iscsi_cls_session *session;
 
-	session = kzalloc(sizeof(*session) + transport->sessiondata_size,
+	session = kzalloc(sizeof(*session) + dd_size,
 			  GFP_KERNEL);
 	if (!session)
 		return NULL;
@@ -487,7 +659,6 @@ iscsi_alloc_session(struct Scsi_Host *shost,
 	session->recovery_tmo = 120;
 	session->state = ISCSI_SESSION_FREE;
 	INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
-	INIT_LIST_HEAD(&session->host_list);
 	INIT_LIST_HEAD(&session->sess_list);
 	INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
 	INIT_WORK(&session->block_work, __iscsi_block_session);
@@ -500,22 +671,57 @@ iscsi_alloc_session(struct Scsi_Host *shost,
 	session->dev.parent = &shost->shost_gendev;
 	session->dev.release = iscsi_session_release;
 	device_initialize(&session->dev);
-	if (transport->sessiondata_size)
+	if (dd_size)
 		session->dd_data = &session[1];
 	return session;
 }
 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
 
+static int iscsi_get_next_target_id(struct device *dev, void *data)
+{
+	struct iscsi_cls_session *session;
+	unsigned long flags;
+	int err = 0;
+
+	if (!iscsi_is_session_dev(dev))
+		return 0;
+
+	session = iscsi_dev_to_session(dev);
+	spin_lock_irqsave(&session->lock, flags);
+	if (*((unsigned int *) data) == session->target_id)
+		err = -EEXIST;
+	spin_unlock_irqrestore(&session->lock, flags);
+	return err;
+}
+
 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 {
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost;
+	struct iscsi_cls_host *ihost;
 	unsigned long flags;
+	unsigned int id = target_id;
 	int err;
 
 	ihost = shost->shost_data;
 	session->sid = atomic_add_return(1, &iscsi_session_nr);
-	session->target_id = target_id;
+
+	if (id == ISCSI_MAX_TARGET) {
+		for (id = 0; id < ISCSI_MAX_TARGET; id++) {
+			err = device_for_each_child(&shost->shost_gendev, &id,
+						    iscsi_get_next_target_id);
+			if (!err)
+				break;
+		}
+
+		if (id == ISCSI_MAX_TARGET) {
+			iscsi_cls_session_printk(KERN_ERR, session,
+						 "Too many iscsi targets. Max "
+						 "number of targets is %d.\n",
+						 ISCSI_MAX_TARGET - 1);
+			goto release_host;
+		}
+	}
+	session->target_id = id;
 
 	snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
 		 session->sid);
@@ -531,10 +737,6 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 	list_add(&session->sess_list, &sesslist);
 	spin_unlock_irqrestore(&sesslock, flags);
 
-	mutex_lock(&ihost->mutex);
-	list_add(&session->host_list, &ihost->sessions);
-	mutex_unlock(&ihost->mutex);
-
 	iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
 	return 0;
 
@@ -548,18 +750,18 @@ EXPORT_SYMBOL_GPL(iscsi_add_session);
  * iscsi_create_session - create iscsi class session
  * @shost: scsi host
  * @transport: iscsi transport
+ * @dd_size: private driver data size
  * @target_id: which target
  *
  * This can be called from a LLD or iscsi_transport.
  */
 struct iscsi_cls_session *
-iscsi_create_session(struct Scsi_Host *shost,
-		     struct iscsi_transport *transport,
-		     unsigned int target_id)
+iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
+		     int dd_size, unsigned int target_id)
 {
 	struct iscsi_cls_session *session;
 
-	session = iscsi_alloc_session(shost, transport);
+	session = iscsi_alloc_session(shost, transport, dd_size);
 	if (!session)
 		return NULL;
 
@@ -595,7 +797,7 @@ static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
 void iscsi_remove_session(struct iscsi_cls_session *session)
 {
 	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_host *ihost = shost->shost_data;
+	struct iscsi_cls_host *ihost = shost->shost_data;
 	unsigned long flags;
 	int err;
 
@@ -661,6 +863,7 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session);
 /**
  * iscsi_create_conn - create iscsi class connection
  * @session: iscsi cls session
+ * @dd_size: private driver data size
  * @cid: connection id
  *
  * This can be called from a LLD or iscsi_transport. The connection
@@ -673,18 +876,17 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session);
  * non-zero.
  */
 struct iscsi_cls_conn *
-iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
+iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
 {
 	struct iscsi_transport *transport = session->transport;
 	struct iscsi_cls_conn *conn;
 	unsigned long flags;
 	int err;
 
-	conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
+	conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
 	if (!conn)
 		return NULL;
-
-	if (transport->conndata_size)
+	if (dd_size)
 		conn->dd_data = &conn[1];
 
 	INIT_LIST_HEAD(&conn->conn_list);
@@ -1017,21 +1219,20 @@ int iscsi_session_event(struct iscsi_cls_session *session,
 EXPORT_SYMBOL_GPL(iscsi_session_event);
 
 static int
-iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
+iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
+			struct iscsi_uevent *ev, uint32_t initial_cmdsn,
+			uint16_t cmds_max, uint16_t queue_depth)
 {
 	struct iscsi_transport *transport = priv->iscsi_transport;
 	struct iscsi_cls_session *session;
-	uint32_t hostno;
+	uint32_t host_no;
 
-	session = transport->create_session(transport, &priv->t,
-					    ev->u.c_session.cmds_max,
-					    ev->u.c_session.queue_depth,
-					    ev->u.c_session.initial_cmdsn,
-					    &hostno);
+	session = transport->create_session(ep, cmds_max, queue_depth,
+					    initial_cmdsn, &host_no);
 	if (!session)
 		return -ENOMEM;
 
-	ev->r.c_session_ret.host_no = hostno;
+	ev->r.c_session_ret.host_no = host_no;
 	ev->r.c_session_ret.sid = session->sid;
 	return 0;
 }
@@ -1106,6 +1307,7 @@ static int
 iscsi_if_transport_ep(struct iscsi_transport *transport,
 		      struct iscsi_uevent *ev, int msg_type)
 {
+	struct iscsi_endpoint *ep;
 	struct sockaddr *dst_addr;
 	int rc = 0;
 
@@ -1115,22 +1317,33 @@ iscsi_if_transport_ep(struct iscsi_transport *transport,
 			return -EINVAL;
 
 		dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
-		rc = transport->ep_connect(dst_addr,
-					   ev->u.ep_connect.non_blocking,
-					   &ev->r.ep_connect_ret.handle);
+		ep = transport->ep_connect(dst_addr,
+					   ev->u.ep_connect.non_blocking);
+		if (IS_ERR(ep))
+			return PTR_ERR(ep);
+
+		ev->r.ep_connect_ret.handle = ep->id;
 		break;
 	case ISCSI_UEVENT_TRANSPORT_EP_POLL:
 		if (!transport->ep_poll)
 			return -EINVAL;
 
-		ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle,
+		ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
+		if (!ep)
+			return -EINVAL;
+
+		ev->r.retcode = transport->ep_poll(ep,
 						   ev->u.ep_poll.timeout_ms);
 		break;
 	case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
 		if (!transport->ep_disconnect)
 			return -EINVAL;
 
-		transport->ep_disconnect(ev->u.ep_disconnect.ep_handle);
+		ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle);
+		if (!ep)
+			return -EINVAL;
+
+		transport->ep_disconnect(ep);
 		break;
 	}
 	return rc;
@@ -1195,6 +1408,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	struct iscsi_internal *priv;
 	struct iscsi_cls_session *session;
 	struct iscsi_cls_conn *conn;
+	struct iscsi_endpoint *ep = NULL;
 
 	priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
 	if (!priv)
@@ -1208,7 +1422,22 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 	switch (nlh->nlmsg_type) {
 	case ISCSI_UEVENT_CREATE_SESSION:
-		err = iscsi_if_create_session(priv, ev);
+		err = iscsi_if_create_session(priv, ep, ev,
+					      ev->u.c_session.initial_cmdsn,
+					      ev->u.c_session.cmds_max,
+					      ev->u.c_session.queue_depth);
+		break;
+	case ISCSI_UEVENT_CREATE_BOUND_SESSION:
+		ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
+		if (!ep) {
+			err = -EINVAL;
+			break;
+		}
+
+		err = iscsi_if_create_session(priv, ep, ev,
+					ev->u.c_bound_session.initial_cmdsn,
+					ev->u.c_bound_session.cmds_max,
+					ev->u.c_bound_session.queue_depth);
 		break;
 	case ISCSI_UEVENT_DESTROY_SESSION:
 		session = iscsi_session_lookup(ev->u.d_session.sid);
@@ -1414,6 +1643,8 @@ iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
+iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
+iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0)
 
 static ssize_t
 show_priv_session_state(struct device *dev, struct device_attribute *attr,
@@ -1580,6 +1811,8 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	priv->daemon_pid = -1;
 	priv->iscsi_transport = tt;
 	priv->t.user_scan = iscsi_user_scan;
+	if (!(tt->caps & CAP_DATA_PATH_OFFLOAD))
+		priv->t.create_work_queue = 1;
 
 	priv->dev.class = &iscsi_transport_class;
 	snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name);
@@ -1595,7 +1828,7 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	priv->t.host_attrs.ac.attrs = &priv->host_attrs[0];
 	priv->t.host_attrs.ac.class = &iscsi_host_class.class;
 	priv->t.host_attrs.ac.match = iscsi_host_match;
-	priv->t.host_size = sizeof(struct iscsi_host);
+	priv->t.host_size = sizeof(struct iscsi_cls_host);
 	transport_container_register(&priv->t.host_attrs);
 
 	SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME);
@@ -1653,6 +1886,8 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
 	SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO);
 	SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO);
+	SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME);
+	SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME);
 	SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
 	SETUP_PRIV_SESSION_RD_ATTR(state);
 
@@ -1668,6 +1903,7 @@ iscsi_register_transport(struct iscsi_transport *tt)
 
 unregister_dev:
 	device_unregister(&priv->dev);
+	return NULL;
 free_priv:
 	kfree(priv);
 	return NULL;
@@ -1715,10 +1951,14 @@ static __init int iscsi_transport_init(void)
 	if (err)
 		return err;
 
-	err = transport_class_register(&iscsi_host_class);
+	err = class_register(&iscsi_endpoint_class);
 	if (err)
 		goto unregister_transport_class;
 
+	err = transport_class_register(&iscsi_host_class);
+	if (err)
+		goto unregister_endpoint_class;
+
 	err = transport_class_register(&iscsi_connection_class);
 	if (err)
 		goto unregister_host_class;
@@ -1727,8 +1967,8 @@ static __init int iscsi_transport_init(void)
 	if (err)
 		goto unregister_conn_class;
 
-	nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL,
-			THIS_MODULE);
+	nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx,
+				    NULL, THIS_MODULE);
 	if (!nls) {
 		err = -ENOBUFS;
 		goto unregister_session_class;
@@ -1748,6 +1988,8 @@ unregister_conn_class:
 	transport_class_unregister(&iscsi_connection_class);
 unregister_host_class:
 	transport_class_unregister(&iscsi_host_class);
+unregister_endpoint_class:
+	class_unregister(&iscsi_endpoint_class);
 unregister_transport_class:
 	class_unregister(&iscsi_transport_class);
 	return err;
@@ -1760,6 +2002,7 @@ static void __exit iscsi_transport_exit(void)
 	transport_class_unregister(&iscsi_connection_class);
 	transport_class_unregister(&iscsi_session_class);
 	transport_class_unregister(&iscsi_host_class);
+	class_unregister(&iscsi_endpoint_class);
 	class_unregister(&iscsi_transport_class);
 }
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index d53312c42547..0c63947d8a9d 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -58,8 +58,8 @@
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_ioctl.h>
 #include <scsi/scsicam.h>
-#include <scsi/sd.h>
 
+#include "sd.h"
 #include "scsi_logging.h"
 
 MODULE_AUTHOR("Eric Youngdale");
@@ -295,11 +295,6 @@ static int sd_major(int major_idx)
 	}
 }
 
-static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
-{
-	return container_of(disk->private_data, struct scsi_disk, driver);
-}
-
 static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
 {
 	struct scsi_disk *sdkp = NULL;
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
new file mode 100644
index 000000000000..03a3d45cfa42
--- /dev/null
+++ b/drivers/scsi/sd.h
@@ -0,0 +1,62 @@
+#ifndef _SCSI_DISK_H
+#define _SCSI_DISK_H
+
+/*
+ * More than enough for everybody ;)  The huge number of majors
+ * is a leftover from 16bit dev_t days, we don't really need that
+ * much numberspace.
+ */
+#define SD_MAJORS	16
+
+/*
+ * This is limited by the naming scheme enforced in sd_probe,
+ * add another character to it if you really need more disks.
+ */
+#define SD_MAX_DISKS	(((26 * 26) + 26 + 1) * 26)
+
+/*
+ * Time out in seconds for disks and Magneto-opticals (which are slower).
+ */
+#define SD_TIMEOUT		(30 * HZ)
+#define SD_MOD_TIMEOUT		(75 * HZ)
+
+/*
+ * Number of allowed retries
+ */
+#define SD_MAX_RETRIES		5
+#define SD_PASSTHROUGH_RETRIES	1
+
+/*
+ * Size of the initial data buffer for mode and read capacity data
+ */
+#define SD_BUF_SIZE		512
+
+struct scsi_disk {
+	struct scsi_driver *driver;	/* always &sd_template */
+	struct scsi_device *device;
+	struct device	dev;
+	struct gendisk	*disk;
+	unsigned int	openers;	/* protected by BKL for now, yuck */
+	sector_t	capacity;	/* size in 512-byte sectors */
+	u32		index;
+	u8		media_present;
+	u8		write_prot;
+	unsigned	previous_state : 1;
+	unsigned	WCE : 1;	/* state of disk WCE bit */
+	unsigned	RCD : 1;	/* state of disk RCD bit, unused */
+	unsigned	DPOFUA : 1;	/* state of disk DPOFUA bit */
+};
+#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
+
+static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
+{
+	return container_of(disk->private_data, struct scsi_disk, driver);
+}
+
+#define sd_printk(prefix, sdsk, fmt, a...)				\
+        (sdsk)->disk ?							\
+	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
+		    (sdsk)->disk->disk_name, ##a) :			\
+	sdev_printk(prefix, (sdsk)->device, fmt, ##a)
+
+#endif /* _SCSI_DISK_H */
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index fccd2e88d600..d3b8ebb83776 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1036,6 +1036,9 @@ sg_ioctl(struct inode *inode, struct file *filp,
 		case SG_SCSI_RESET_DEVICE:
 			val = SCSI_TRY_RESET_DEVICE;
 			break;
+		case SG_SCSI_RESET_TARGET:
+			val = SCSI_TRY_RESET_TARGET;
+			break;
 		case SG_SCSI_RESET_BUS:
 			val = SCSI_TRY_RESET_BUS;
 			break;
diff --git a/drivers/scsi/sym53c8xx_2/sym_misc.h b/drivers/scsi/sym53c8xx_2/sym_misc.h
index 0433d5d0caf3..430537183c18 100644
--- a/drivers/scsi/sym53c8xx_2/sym_misc.h
+++ b/drivers/scsi/sym53c8xx_2/sym_misc.h
@@ -121,9 +121,7 @@ static __inline void sym_que_move(struct sym_quehead *orig,
 	}
 }
 
-#define sym_que_entry(ptr, type, member) \
-	((type *)((char *)(ptr)-(unsigned int)(&((type *)0)->member)))
-
+#define sym_que_entry(ptr, type, member) container_of(ptr, type, member)
 
 #define sym_insque(new, pos)		__sym_que_add(new, pos, (pos)->flink)