From 077e6dba20e74a455a0452379d2a965c7e1b01ad Mon Sep 17 00:00:00 2001
From: Borislav Petkov <petkovbb@gmail.com>
Date: Fri, 1 May 2009 21:21:02 +0200
Subject: ide-atapi: switch to rq->resid_len

Now that we have rq->resid_len, use it to account partial completion
amount during the lifetime of an rq, decrementing it on each successful
transfer. As a result, get rid of now unused pc->xferred.

While at it, remove noisy debug call in ide_prep_sense.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 include/linux/ide.h | 2 --
 1 file changed, 2 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 34c128f0a33c..745a393af278 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -357,8 +357,6 @@ struct ide_atapi_pc {
 
 	/* bytes to transfer */
 	int req_xfer;
-	/* bytes actually transferred */
-	int xferred;
 
 	/* data buffer */
 	u8 *buf;
-- 
cgit v1.2.3


From 5a0e43b5e2ee9a295f864c38f0e853b1a4fc3892 Mon Sep 17 00:00:00 2001
From: Borislav Petkov <petkovbb@gmail.com>
Date: Fri, 1 May 2009 23:27:11 +0200
Subject: ide-atapi: add a len-parameter to ide_queue_pc_tail

This is in preparation for removing ide_atapi_pc.

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-atapi.c        | 12 ++++++------
 drivers/ide/ide-floppy.c       |  4 ++--
 drivers/ide/ide-floppy_ioctl.c |  8 ++++----
 drivers/ide/ide-tape.c         | 26 +++++++++++++-------------
 include/linux/ide.h            |  3 ++-
 5 files changed, 27 insertions(+), 26 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 1022e421abd8..0d4da2c1adc1 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -84,7 +84,7 @@ EXPORT_SYMBOL_GPL(ide_init_pc);
  * and wait for it to be serviced.
  */
 int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
-		      struct ide_atapi_pc *pc)
+		      struct ide_atapi_pc *pc, unsigned int bufflen)
 {
 	struct request *rq;
 	int error;
@@ -93,8 +93,8 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
 	rq->cmd_type = REQ_TYPE_SPECIAL;
 	rq->special = (char *)pc;
 
-	if (pc->req_xfer) {
-		error = blk_rq_map_kern(drive->queue, rq, pc->buf, pc->req_xfer,
+	if (bufflen) {
+		error = blk_rq_map_kern(drive->queue, rq, pc->buf, bufflen,
 					GFP_NOIO);
 		if (error)
 			goto put_req;
@@ -117,7 +117,7 @@ int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk)
 	ide_init_pc(&pc);
 	pc.c[0] = TEST_UNIT_READY;
 
-	return ide_queue_pc_tail(drive, disk, &pc);
+	return ide_queue_pc_tail(drive, disk, &pc, 0);
 }
 EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
 
@@ -132,7 +132,7 @@ int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start)
 	if (drive->media == ide_tape)
 		pc.flags |= PC_FLAG_WAIT_FOR_DSC;
 
-	return ide_queue_pc_tail(drive, disk, &pc);
+	return ide_queue_pc_tail(drive, disk, &pc, 0);
 }
 EXPORT_SYMBOL_GPL(ide_do_start_stop);
 
@@ -147,7 +147,7 @@ int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
 	pc.c[0] = ALLOW_MEDIUM_REMOVAL;
 	pc.c[4] = on;
 
-	return ide_queue_pc_tail(drive, disk, &pc);
+	return ide_queue_pc_tail(drive, disk, &pc, 0);
 }
 EXPORT_SYMBOL_GPL(ide_set_media_lock);
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index a1c55985d4ae..5df00d4ab8da 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -318,7 +318,7 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
 
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 
-	if (ide_queue_pc_tail(drive, disk, pc)) {
+	if (ide_queue_pc_tail(drive, disk, pc, pc->req_xfer)) {
 		printk(KERN_ERR PFX "Can't get flexible disk page params\n");
 		return 1;
 	}
@@ -390,7 +390,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 	pc.buf = &pc_buf[0];
 	pc.buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, disk, &pc)) {
+	if (ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer)) {
 		printk(KERN_ERR PFX "Can't get floppy parameters\n");
 		return 1;
 	}
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index cd8a42027ede..75f1d50276a4 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -50,7 +50,7 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 	pc->buf = &pc_buf[0];
 	pc->buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc)) {
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer)) {
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return -EIO;
 	}
@@ -124,7 +124,7 @@ static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc)
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
 	pc->flags |= PC_FLAG_SUPPRESS_ERROR;
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
 		return 1;
 
 	if (pc->buf[8 + 2] & 0x40)
@@ -172,7 +172,7 @@ static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
 	ide_floppy_get_sfrp_bit(drive, pc);
 	ide_floppy_create_format_unit_cmd(pc, blocks, length, flags);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
 		err = -EIO;
 
 out:
@@ -200,7 +200,7 @@ static int ide_floppy_get_format_progress(ide_drive_t *drive,
 
 	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
 		ide_create_request_sense_cmd(drive, pc);
-		if (ide_queue_pc_tail(drive, floppy->disk, pc))
+		if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
 			return -EIO;
 
 		if (floppy->sense_key == 2 &&
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index c93370997972..f09a263b72f2 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -770,7 +770,7 @@ static int idetape_flush_tape_buffers(ide_drive_t *drive)
 	int rc;
 
 	idetape_create_write_filemark_cmd(drive, &pc, 0);
-	rc = ide_queue_pc_tail(drive, tape->disk, &pc);
+	rc = ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer);
 	if (rc)
 		return rc;
 	idetape_wait_ready(drive, 60 * 5 * HZ);
@@ -793,7 +793,7 @@ static int idetape_read_position(ide_drive_t *drive)
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
 	idetape_create_read_position_cmd(&pc);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc))
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer))
 		return -1;
 	position = tape->first_frame;
 	return position;
@@ -846,12 +846,12 @@ static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
 		__ide_tape_discard_merge_buffer(drive);
 	idetape_wait_ready(drive, 60 * 5 * HZ);
 	idetape_create_locate_cmd(drive, &pc, block, partition, skip);
-	retval = ide_queue_pc_tail(drive, disk, &pc);
+	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	if (retval)
 		return (retval);
 
 	idetape_create_read_position_cmd(&pc);
-	return ide_queue_pc_tail(drive, disk, &pc);
+	return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 }
 
 static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
@@ -1047,12 +1047,12 @@ static int idetape_rewind_tape(ide_drive_t *drive)
 	debug_log(DBG_SENSE, "Enter %s\n", __func__);
 
 	idetape_create_rewind_cmd(drive, &pc);
-	retval = ide_queue_pc_tail(drive, disk, &pc);
+	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	if (retval)
 		return retval;
 
 	idetape_create_read_position_cmd(&pc);
-	retval = ide_queue_pc_tail(drive, disk, &pc);
+	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	if (retval)
 		return retval;
 	return 0;
@@ -1120,7 +1120,7 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
 	case MTBSF:
 		idetape_create_space_cmd(&pc, mt_count - count,
 					 IDETAPE_SPACE_OVER_FILEMARK);
-		return ide_queue_pc_tail(drive, disk, &pc);
+		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	case MTFSFM:
 	case MTBSFM:
 		if (!sprev)
@@ -1259,7 +1259,7 @@ static int idetape_write_filemark(ide_drive_t *drive)
 
 	/* Write a filemark */
 	idetape_create_write_filemark_cmd(drive, &pc, 1);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
 		return -EIO;
 	}
@@ -1344,11 +1344,11 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 			IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
 	case MTEOM:
 		idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
-		return ide_queue_pc_tail(drive, disk, &pc);
+		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	case MTERASE:
 		(void)idetape_rewind_tape(drive);
 		idetape_create_erase_cmd(&pc);
-		return ide_queue_pc_tail(drive, disk, &pc);
+		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
 	case MTSETBLK:
 		if (mt_count) {
 			if (mt_count < tape->blk_size ||
@@ -1457,7 +1457,7 @@ static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
 	struct ide_atapi_pc pc;
 
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
 		if (tape->blk_size == 0) {
 			printk(KERN_WARNING "ide-tape: Cannot deal with zero "
@@ -1613,7 +1613,7 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 	pc.buf = &pc_buf[0];
 	pc.buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
 				tape->name);
 		return;
@@ -1642,7 +1642,7 @@ static void idetape_get_mode_sense_results(ide_drive_t *drive)
 	u8 speed, max_speed;
 
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
 				" some default values\n");
 		tape->blk_size = 512;
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 745a393af278..7e15bd1eaae9 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1160,7 +1160,8 @@ enum {
 	REQ_IDETAPE_WRITE	= (1 << 3),
 };
 
-int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
+int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
+		      unsigned int);
 
 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
-- 
cgit v1.2.3


From b13345f39dadbabdabaf8819cf6df26913da9e8d Mon Sep 17 00:00:00 2001
From: Borislav Petkov <petkovbb@gmail.com>
Date: Sat, 2 May 2009 10:26:12 +0200
Subject: ide-atapi: add a buffer-arg to ide_queue_pc_tail

This is in preparation of removing ide_atapi_pc. Expose the buffer as an
argument to ide_queue_pc_tail with later replacing it with local buffer
or even kmalloc'ed one if needed due to stack usage constraints.

Also, add the possibility of passing a NULL-ptr buffer for cmds which
don't transfer data besides the cdb. While at it, switch to local buffer
in idetape_get_mode_sense_results().

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-atapi.c        | 12 ++++++------
 drivers/ide/ide-floppy.c       | 17 ++++++++---------
 drivers/ide/ide-floppy_ioctl.c | 16 ++++++++--------
 drivers/ide/ide-tape.c         | 37 ++++++++++++++++++-------------------
 include/linux/ide.h            |  2 +-
 5 files changed, 41 insertions(+), 43 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 0d4da2c1adc1..b12be1f17f14 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -84,7 +84,7 @@ EXPORT_SYMBOL_GPL(ide_init_pc);
  * and wait for it to be serviced.
  */
 int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
-		      struct ide_atapi_pc *pc, unsigned int bufflen)
+		      struct ide_atapi_pc *pc, void *buf, unsigned int bufflen)
 {
 	struct request *rq;
 	int error;
@@ -93,8 +93,8 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
 	rq->cmd_type = REQ_TYPE_SPECIAL;
 	rq->special = (char *)pc;
 
-	if (bufflen) {
-		error = blk_rq_map_kern(drive->queue, rq, pc->buf, bufflen,
+	if (buf && bufflen) {
+		error = blk_rq_map_kern(drive->queue, rq, buf, bufflen,
 					GFP_NOIO);
 		if (error)
 			goto put_req;
@@ -117,7 +117,7 @@ int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk)
 	ide_init_pc(&pc);
 	pc.c[0] = TEST_UNIT_READY;
 
-	return ide_queue_pc_tail(drive, disk, &pc, 0);
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 }
 EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
 
@@ -132,7 +132,7 @@ int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start)
 	if (drive->media == ide_tape)
 		pc.flags |= PC_FLAG_WAIT_FOR_DSC;
 
-	return ide_queue_pc_tail(drive, disk, &pc, 0);
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 }
 EXPORT_SYMBOL_GPL(ide_do_start_stop);
 
@@ -147,7 +147,7 @@ int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
 	pc.c[0] = ALLOW_MEDIUM_REMOVAL;
 	pc.c[4] = on;
 
-	return ide_queue_pc_tail(drive, disk, &pc, 0);
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 }
 EXPORT_SYMBOL_GPL(ide_set_media_lock);
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 5df00d4ab8da..be21cf23f8cb 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -318,7 +318,7 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
 
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 
-	if (ide_queue_pc_tail(drive, disk, pc, pc->req_xfer)) {
+	if (ide_queue_pc_tail(drive, disk, pc, pc->buf, pc->req_xfer)) {
 		printk(KERN_ERR PFX "Can't get flexible disk page params\n");
 		return 1;
 	}
@@ -387,22 +387,21 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 	drive->capacity64 = 0;
 
 	ide_floppy_create_read_capacity_cmd(&pc);
-	pc.buf = &pc_buf[0];
 	pc.buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer)) {
+	if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
 		printk(KERN_ERR PFX "Can't get floppy parameters\n");
 		return 1;
 	}
-	header_len = pc.buf[3];
-	cap_desc = &pc.buf[4];
+	header_len = pc_buf[3];
+	cap_desc = &pc_buf[4];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	for (i = 0; i < desc_cnt; i++) {
 		unsigned int desc_start = 4 + i*8;
 
-		blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
-		length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
 
 		ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
 					     "%d sector size",
@@ -415,7 +414,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 		 * the code below is valid only for the 1st descriptor, ie i=0
 		 */
 
-		switch (pc.buf[desc_start + 4] & 0x03) {
+		switch (pc_buf[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
 			if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
@@ -464,7 +463,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 			break;
 		}
 		ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
-					     pc.buf[desc_start + 4] & 0x03);
+					     pc_buf[desc_start + 4] & 0x03);
 	}
 
 	/* Clik! disk does not support get_flexible_disk_page */
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index 75f1d50276a4..9c2518d7514d 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -47,15 +47,14 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 		return -EINVAL;
 
 	ide_floppy_create_read_capacity_cmd(pc);
-	pc->buf = &pc_buf[0];
 	pc->buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer)) {
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return -EIO;
 	}
 
-	header_len = pc->buf[3];
+	header_len = pc_buf[3];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	u_index = 0;
@@ -72,8 +71,8 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 		if (u_index >= u_array_size)
 			break;	/* User-supplied buffer too small */
 
-		blocks = be32_to_cpup((__be32 *)&pc->buf[desc_start]);
-		length = be16_to_cpup((__be16 *)&pc->buf[desc_start + 6]);
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
 
 		if (put_user(blocks, argp))
 			return -EFAULT;
@@ -124,7 +123,7 @@ static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc)
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
 	pc->flags |= PC_FLAG_SUPPRESS_ERROR;
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->buf, pc->req_xfer))
 		return 1;
 
 	if (pc->buf[8 + 2] & 0x40)
@@ -172,7 +171,7 @@ static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
 	ide_floppy_get_sfrp_bit(drive, pc);
 	ide_floppy_create_format_unit_cmd(pc, blocks, length, flags);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->buf, pc->req_xfer))
 		err = -EIO;
 
 out:
@@ -200,7 +199,8 @@ static int ide_floppy_get_format_progress(ide_drive_t *drive,
 
 	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
 		ide_create_request_sense_cmd(drive, pc);
-		if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->req_xfer))
+		if (ide_queue_pc_tail(drive, floppy->disk, pc, pc->buf,
+				      pc->req_xfer))
 			return -EIO;
 
 		if (floppy->sense_key == 2 &&
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index f09a263b72f2..1f7f50473a4f 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -770,7 +770,7 @@ static int idetape_flush_tape_buffers(ide_drive_t *drive)
 	int rc;
 
 	idetape_create_write_filemark_cmd(drive, &pc, 0);
-	rc = ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer);
+	rc = ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0);
 	if (rc)
 		return rc;
 	idetape_wait_ready(drive, 60 * 5 * HZ);
@@ -793,7 +793,7 @@ static int idetape_read_position(ide_drive_t *drive)
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
 	idetape_create_read_position_cmd(&pc);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer))
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.buf, pc.req_xfer))
 		return -1;
 	position = tape->first_frame;
 	return position;
@@ -846,12 +846,12 @@ static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
 		__ide_tape_discard_merge_buffer(drive);
 	idetape_wait_ready(drive, 60 * 5 * HZ);
 	idetape_create_locate_cmd(drive, &pc, block, partition, skip);
-	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+	retval = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 	if (retval)
 		return (retval);
 
 	idetape_create_read_position_cmd(&pc);
-	return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+	return ide_queue_pc_tail(drive, disk, &pc, pc.buf, pc.req_xfer);
 }
 
 static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
@@ -1047,12 +1047,12 @@ static int idetape_rewind_tape(ide_drive_t *drive)
 	debug_log(DBG_SENSE, "Enter %s\n", __func__);
 
 	idetape_create_rewind_cmd(drive, &pc);
-	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+	retval = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 	if (retval)
 		return retval;
 
 	idetape_create_read_position_cmd(&pc);
-	retval = ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+	retval = ide_queue_pc_tail(drive, disk, &pc, pc.buf, pc.req_xfer);
 	if (retval)
 		return retval;
 	return 0;
@@ -1120,7 +1120,7 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
 	case MTBSF:
 		idetape_create_space_cmd(&pc, mt_count - count,
 					 IDETAPE_SPACE_OVER_FILEMARK);
-		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 	case MTFSFM:
 	case MTBSFM:
 		if (!sprev)
@@ -1259,7 +1259,7 @@ static int idetape_write_filemark(ide_drive_t *drive)
 
 	/* Write a filemark */
 	idetape_create_write_filemark_cmd(drive, &pc, 1);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0)) {
 		printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
 		return -EIO;
 	}
@@ -1344,11 +1344,11 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 			IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
 	case MTEOM:
 		idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
-		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 	case MTERASE:
 		(void)idetape_rewind_tape(drive);
 		idetape_create_erase_cmd(&pc);
-		return ide_queue_pc_tail(drive, disk, &pc, pc.req_xfer);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
 	case MTSETBLK:
 		if (mt_count) {
 			if (mt_count < tape->blk_size ||
@@ -1457,7 +1457,7 @@ static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
 	struct ide_atapi_pc pc;
 
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.buf, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
 		if (tape->blk_size == 0) {
 			printk(KERN_WARNING "ide-tape: Cannot deal with zero "
@@ -1610,17 +1610,16 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 	char fw_rev[4], vendor_id[8], product_id[16];
 
 	idetape_create_inquiry_cmd(&pc);
-	pc.buf = &pc_buf[0];
 	pc.buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc_buf, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
 				tape->name);
 		return;
 	}
-	memcpy(vendor_id, &pc.buf[8], 8);
-	memcpy(product_id, &pc.buf[16], 16);
-	memcpy(fw_rev, &pc.buf[32], 4);
+	memcpy(vendor_id, &pc_buf[8], 8);
+	memcpy(product_id, &pc_buf[16], 16);
+	memcpy(fw_rev, &pc_buf[32], 4);
 
 	ide_fixstring(vendor_id, 8, 0);
 	ide_fixstring(product_id, 16, 0);
@@ -1638,11 +1637,11 @@ static void idetape_get_mode_sense_results(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc pc;
-	u8 *caps;
+	u8 buf[24], *caps;
 	u8 speed, max_speed;
 
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
-	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc.req_xfer)) {
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
 				" some default values\n");
 		tape->blk_size = 512;
@@ -1651,7 +1650,7 @@ static void idetape_get_mode_sense_results(ide_drive_t *drive)
 		put_unaligned(6*52, (u16 *)&tape->caps[16]);
 		return;
 	}
-	caps = pc.buf + 4 + pc.buf[3];
+	caps = buf + 4 + buf[3];
 
 	/* convert to host order and save for later use */
 	speed = be16_to_cpup((__be16 *)&caps[14]);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 7e15bd1eaae9..4cd7157a403f 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1161,7 +1161,7 @@ enum {
 };
 
 int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
-		      unsigned int);
+		      void *, unsigned int);
 
 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
-- 
cgit v1.2.3


From 19f52a784f7ecb5b51cd73cc4514614b600b995a Mon Sep 17 00:00:00 2001
From: Borislav Petkov <petkovbb@gmail.com>
Date: Mon, 4 May 2009 09:53:03 +0200
Subject: ide-atapi: remove pc->buf

Now after all users of pc->buf have been converted, remove the 64B buffer
embedded in each packet command.

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-atapi.c        |  6 ------
 drivers/ide/ide-floppy.c       |  8 +-------
 drivers/ide/ide-floppy_ioctl.c |  1 -
 drivers/ide/ide-tape.c         |  7 ++-----
 include/linux/ide.h            | 11 -----------
 5 files changed, 3 insertions(+), 30 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 66ea1e7774fd..3075b0414667 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -74,8 +74,6 @@ EXPORT_SYMBOL_GPL(ide_check_atapi_device);
 void ide_init_pc(struct ide_atapi_pc *pc)
 {
 	memset(pc, 0, sizeof(*pc));
-	pc->buf = pc->pc_buf;
-	pc->buf_size = IDE_PC_BUFFER_SIZE;
 }
 EXPORT_SYMBOL_GPL(ide_init_pc);
 
@@ -254,10 +252,6 @@ void ide_retry_pc(ide_drive_t *drive)
 	ide_init_pc(pc);
 	memcpy(pc->c, sense_rq->cmd, 12);
 
-	/* pointer to mapped address */
-	pc->buf = bio_data(sense_rq->bio);
-	pc->req_xfer = blk_rq_bytes(sense_rq);
-
 	if (drive->media == ide_tape)
 		set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 14e5e9ca2ad9..800c83a9db83 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -210,8 +210,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
 	pc->rq = rq;
 	if (rq->cmd_flags & REQ_RW)
 		pc->flags |= PC_FLAG_WRITING;
-	pc->buf = NULL;
-	pc->buf_size = blk_rq_bytes(rq);
+
 	pc->flags |= PC_FLAG_DMA_OK;
 }
 
@@ -226,9 +225,6 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
 		if (rq_data_dir(rq) == WRITE)
 			pc->flags |= PC_FLAG_WRITING;
 	}
-	/* pio will be performed by ide_pio_bytes() which handles sg fine */
-	pc->buf = NULL;
-	pc->buf_size = blk_rq_bytes(rq);
 }
 
 static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
@@ -388,8 +384,6 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 	drive->capacity64 = 0;
 
 	ide_floppy_create_read_capacity_cmd(&pc);
-	pc.buf_size = sizeof(pc_buf);
-
 	if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
 		printk(KERN_ERR PFX "Can't get floppy parameters\n");
 		return 1;
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index 3a1f9b50b3eb..9c2288234dea 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -47,7 +47,6 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 		return -EINVAL;
 
 	ide_floppy_create_read_capacity_cmd(pc);
-	pc->buf_size = sizeof(pc_buf);
 
 	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index ead2734bc710..9ca2665faf33 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -568,9 +568,8 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
 	ide_init_pc(pc);
 	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
 	pc->c[1] = 1;
-	pc->buf = NULL;
-	pc->buf_size = blk_rq_bytes(rq);
-	if (pc->buf_size == tape->buffer_size)
+
+	if (blk_rq_bytes(rq) == tape->buffer_size)
 		pc->flags |= PC_FLAG_DMA_OK;
 
 	if (opcode == READ_6)
@@ -1608,8 +1607,6 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 	char fw_rev[4], vendor_id[8], product_id[16];
 
 	idetape_create_inquiry_cmd(&pc);
-	pc.buf_size = sizeof(pc_buf);
-
 	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc_buf, pc.req_xfer)) {
 		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
 				tape->name);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 4cd7157a403f..59aedcd7faee 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -341,11 +341,6 @@ enum {
 	PC_FLAG_WRITING			= (1 << 6),
 };
 
-/*
- * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
- * This is used for several packet commands (not for READ/WRITE commands).
- */
-#define IDE_PC_BUFFER_SIZE	64
 #define ATAPI_WAIT_PC		(60 * HZ)
 
 struct ide_atapi_pc {
@@ -358,10 +353,6 @@ struct ide_atapi_pc {
 	/* bytes to transfer */
 	int req_xfer;
 
-	/* data buffer */
-	u8 *buf;
-	int buf_size;
-
 	/* the corresponding request */
 	struct request *rq;
 
@@ -371,8 +362,6 @@ struct ide_atapi_pc {
 	 * those are more or less driver-specific and some of them are subject
 	 * to change/removal later.
 	 */
-	u8 pc_buf[IDE_PC_BUFFER_SIZE];
-
 	unsigned long timeout;
 };
 
-- 
cgit v1.2.3


From 103f7033bd0f7b65ff3e0a5ea72449d08010b031 Mon Sep 17 00:00:00 2001
From: Borislav Petkov <petkovbb@gmail.com>
Date: Sun, 26 Apr 2009 10:39:07 +0200
Subject: ide: unify interrupt reason checking

Add ide_check_ireason() function that handles all ATAPI devices.
Reorganize all unlikely cases in ireason checking further down in the
code path.

In addition, add PFX for printks originating from ide-atapi. Finally,
remove ide_cd_check_ireason.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-atapi.c | 95 +++++++++++++++++++++++++++++++++++--------------
 drivers/ide/ide-cd.c    | 47 +-----------------------
 include/linux/ide.h     |  2 ++
 3 files changed, 71 insertions(+), 73 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 3075b0414667..1125ce29809b 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -10,6 +10,9 @@
 
 #include <scsi/scsi.h>
 
+#define DRV_NAME "ide-atapi"
+#define PFX DRV_NAME ": "
+
 #ifdef DEBUG
 #define debug_log(fmt, args...) \
 	printk(KERN_INFO "ide: " fmt, ## args)
@@ -197,8 +200,8 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
 			      GFP_NOIO);
 	if (unlikely(err)) {
 		if (printk_ratelimit())
-			printk(KERN_WARNING "%s: failed to map sense buffer\n",
-			       drive->name);
+			printk(KERN_WARNING PFX "%s: failed to map sense "
+					    "buffer\n", drive->name);
 		return;
 	}
 
@@ -219,7 +222,7 @@ int ide_queue_sense_rq(ide_drive_t *drive, void *special)
 {
 	/* deferred failure from ide_prep_sense() */
 	if (!drive->sense_rq_armed) {
-		printk(KERN_WARNING "%s: failed queue sense request\n",
+		printk(KERN_WARNING PFX "%s: error queuing a sense request\n",
 		       drive->name);
 		return -ENOMEM;
 	}
@@ -292,7 +295,7 @@ int ide_cd_expiry(ide_drive_t *drive)
 		break;
 	default:
 		if (!(rq->cmd_flags & REQ_QUIET))
-			printk(KERN_INFO "cmd 0x%x timed out\n",
+			printk(KERN_INFO PFX "cmd 0x%x timed out\n",
 					 rq->cmd[0]);
 		wait = 0;
 		break;
@@ -325,6 +328,55 @@ void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
 }
 EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
 
+/*
+ * Check the contents of the interrupt reason register and attempt to recover if
+ * there are problems.
+ *
+ * Returns:
+ * - 0 if everything's ok
+ * - 1 if the request has to be terminated.
+ */
+int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len,
+		      int ireason, int rw)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw);
+
+	if (ireason == (!rw << 1))
+		return 0;
+	else if (ireason == (rw << 1)) {
+		printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
+				drive->name, __func__);
+
+		if (dev_is_idecd(drive))
+			ide_pad_transfer(drive, rw, len);
+	} else if (!rw && ireason == ATAPI_COD) {
+		if (dev_is_idecd(drive)) {
+			/*
+			 * Some drives (ASUS) seem to tell us that status info
+			 * is available.  Just get it and ignore.
+			 */
+			(void)hwif->tp_ops->read_status(hwif);
+			return 0;
+		}
+	} else {
+		if (ireason & ATAPI_COD)
+			printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name,
+					__func__);
+
+		/* drive wants a command packet, or invalid ireason... */
+		printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
+				drive->name, __func__, ireason);
+	}
+
+	if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC)
+		rq->cmd_flags |= REQ_FAILED;
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(ide_check_ireason);
+
 /*
  * This is the usual interrupt handler which will be called during a packet
  * command.  We will transfer some of the data (as requested by the drive)
@@ -359,7 +411,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 
 		if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) {
 			if (drive->media == ide_floppy)
-				printk(KERN_ERR "%s: DMA %s error\n",
+				printk(KERN_ERR PFX "%s: DMA %s error\n",
 					drive->name, rq_data_dir(pc->rq)
 						     ? "write" : "read");
 			pc->flags |= PC_FLAG_DMA_ERROR;
@@ -391,8 +443,8 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 				pc->rq->errors++;
 
 			if (rq->cmd[0] == REQUEST_SENSE) {
-				printk(KERN_ERR "%s: I/O error in request sense"
-						" command\n", drive->name);
+				printk(KERN_ERR PFX "%s: I/O error in request "
+						"sense command\n", drive->name);
 				return ide_do_reset(drive);
 			}
 
@@ -434,8 +486,8 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
-		printk(KERN_ERR "%s: The device wants to issue more interrupts "
-				"in DMA mode\n", drive->name);
+		printk(KERN_ERR PFX "%s: The device wants to issue more "
+				"interrupts in DMA mode\n", drive->name);
 		ide_dma_off(drive);
 		return ide_do_reset(drive);
 	}
@@ -443,19 +495,8 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 	/* Get the number of bytes to transfer on this interrupt. */
 	ide_read_bcount_and_ireason(drive, &bcount, &ireason);
 
-	if (ireason & ATAPI_COD) {
-		printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
+	if (ide_check_ireason(drive, rq, bcount, ireason, write))
 		return ide_do_reset(drive);
-	}
-
-	if (((ireason & ATAPI_IO) == ATAPI_IO) == write) {
-		/* Hopefully, we will never get here */
-		printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
-				"to %s!\n", drive->name,
-				(ireason & ATAPI_IO) ? "Write" : "Read",
-				(ireason & ATAPI_IO) ? "Read" : "Write");
-		return ide_do_reset(drive);
-	}
 
 	done = min_t(unsigned int, bcount, cmd->nleft);
 	ide_pio_bytes(drive, cmd, write, done);
@@ -503,13 +544,13 @@ static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
 
 	while (retries-- && ((ireason & ATAPI_COD) == 0 ||
 		(ireason & ATAPI_IO))) {
-		printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
+		printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing "
 				"a packet command, retrying\n", drive->name);
 		udelay(100);
 		ireason = ide_read_ireason(drive);
 		if (retries == 0) {
-			printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
-					"a packet command, ignoring\n",
+			printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing"
+					" a packet command, ignoring\n",
 					drive->name);
 			ireason |= ATAPI_COD;
 			ireason &= ~ATAPI_IO;
@@ -540,7 +581,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 	u8 ireason;
 
 	if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
-		printk(KERN_ERR "%s: Strange, packet command initiated yet "
+		printk(KERN_ERR PFX "%s: Strange, packet command initiated yet "
 				"DRQ isn't asserted\n", drive->name);
 		return startstop;
 	}
@@ -582,8 +623,8 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 			ireason = ide_wait_ireason(drive, ireason);
 
 		if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
-			printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
-					"a packet command\n", drive->name);
+			printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while "
+				"issuing a packet command\n", drive->name);
 
 			return ide_do_reset(drive);
 		}
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index dca41ae0d048..d299713bfdc1 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -410,50 +410,6 @@ end_request:
 		return 2;
 }
 
-/*
- * Check the contents of the interrupt reason register from the cdrom
- * and attempt to recover if there are problems.  Returns  0 if everything's
- * ok; nonzero if the request has been terminated.
- */
-static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
-				int len, int ireason, int rw)
-{
-	ide_hwif_t *hwif = drive->hwif;
-
-	ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
-
-	/*
-	 * ireason == 0: the drive wants to receive data from us
-	 * ireason == 2: the drive is expecting to transfer data to us
-	 */
-	if (ireason == (!rw << 1))
-		return 0;
-	else if (ireason == (rw << 1)) {
-
-		/* whoops... */
-		printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
-				drive->name, __func__);
-
-		ide_pad_transfer(drive, rw, len);
-	} else  if (rw == 0 && ireason == 1) {
-		/*
-		 * Some drives (ASUS) seem to tell us that status info is
-		 * available.  Just get it and ignore.
-		 */
-		(void)hwif->tp_ops->read_status(hwif);
-		return 0;
-	} else {
-		/* drive wants a command packet, or invalid ireason... */
-		printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
-				drive->name, __func__, ireason);
-	}
-
-	if (rq->cmd_type == REQ_TYPE_ATA_PC)
-		rq->cmd_flags |= REQ_FAILED;
-
-	return -1;
-}
-
 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 {
 	struct request *rq = cmd->rq;
@@ -645,8 +601,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		goto out_end;
 	}
 
-	/* check which way to transfer data */
-	rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
+	rc = ide_check_ireason(drive, rq, len, ireason, write);
 	if (rc)
 		goto out_end;
 
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 59aedcd7faee..70a2c94d6680 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1125,6 +1125,8 @@ void SELECT_MASK(ide_drive_t *, int);
 u8 ide_read_error(ide_drive_t *);
 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
 
+int ide_check_ireason(ide_drive_t *, struct request *, int, int, int);
+
 int ide_check_atapi_device(ide_drive_t *, const char *);
 
 void ide_init_pc(struct ide_atapi_pc *);
-- 
cgit v1.2.3


From c9ef59ff01b6bd1c7360a64fcc8556a1193c2ed0 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Mon, 15 Jun 2009 18:52:53 +0200
Subject: ide: IORDY handling fixes

Add ide_pio_need_iordy() helper and convert host drivers to use it.

This fixes it8172, it8213, pdc202xx_old, piix, slc90e66 and siimage
host drivers to handle IORDY correctly.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/at91_ide.c      |  3 +--
 drivers/ide/ide-xfer-mode.c |  6 ++++++
 drivers/ide/it8172.c        |  2 +-
 drivers/ide/it8213.c        |  2 +-
 drivers/ide/pdc202xx_old.c  |  2 +-
 drivers/ide/piix.c          |  2 +-
 drivers/ide/siimage.c       | 15 ++++++++-------
 drivers/ide/sl82c105.c      |  3 +--
 drivers/ide/slc90e66.c      |  2 +-
 include/linux/ide.h         |  1 +
 10 files changed, 22 insertions(+), 16 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/at91_ide.c b/drivers/ide/at91_ide.c
index fc0949a8cfde..dbfeda42b940 100644
--- a/drivers/ide/at91_ide.c
+++ b/drivers/ide/at91_ide.c
@@ -185,8 +185,7 @@ static void at91_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	timing = ide_timing_find_mode(XFER_PIO_0 + pio);
 	BUG_ON(!timing);
 
-	if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
-	    !(ata_id_is_cfa(drive->id) && pio > 4))
+	if (ide_pio_need_iordy(drive, pio))
 		use_iordy = 1;
 
 	apply_timings(chipselect, pio, timing, use_iordy);
diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
index af44be9d546c..0b47ca139079 100644
--- a/drivers/ide/ide-xfer-mode.c
+++ b/drivers/ide/ide-xfer-mode.c
@@ -107,6 +107,12 @@ u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
 }
 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 
+int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)
+{
+	return ata_id_pio_need_iordy(drive->id, pio);
+}
+EXPORT_SYMBOL_GPL(ide_pio_need_iordy);
+
 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
 {
 	ide_hwif_t *hwif = drive->hwif;
diff --git a/drivers/ide/it8172.c b/drivers/ide/it8172.c
index e021078cd06b..0d266a5b524d 100644
--- a/drivers/ide/it8172.c
+++ b/drivers/ide/it8172.c
@@ -66,7 +66,7 @@ static void it8172_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	if (drive->media == ide_disk)
 		/* enable prefetch */
 		drive_enables |= 0x0004 << (drive->dn * 4);
-	if (ata_id_has_iordy(drive->id))
+	if (ide_pio_need_iordy(drive, pio))
 		/* enable IORDY sample-point */
 		drive_enables |= 0x0002 << (drive->dn * 4);
 
diff --git a/drivers/ide/it8213.c b/drivers/ide/it8213.c
index d7969b6d139e..47976167796a 100644
--- a/drivers/ide/it8213.c
+++ b/drivers/ide/it8213.c
@@ -50,7 +50,7 @@ static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		control |= 1;	/* Programmable timing on */
 	if (drive->media != ide_disk)
 		control |= 4;	/* ATAPI */
-	if (pio > 2)
+	if (ide_pio_need_iordy(drive, pio))
 		control |= 2;	/* IORDY */
 	if (is_slave) {
 		master_data |=  0x4000;
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
index b6abf7e52cac..4f5b536282af 100644
--- a/drivers/ide/pdc202xx_old.c
+++ b/drivers/ide/pdc202xx_old.c
@@ -73,7 +73,7 @@ static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
 		 * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
 		 */
 		AP &= ~0x3f;
-		if (ata_id_iordy_disable(drive->id))
+		if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
 			AP |= 0x20;	/* set IORDY_EN bit */
 		if (drive->media == ide_disk)
 			AP |= 0x10;	/* set Prefetch_EN bit */
diff --git a/drivers/ide/piix.c b/drivers/ide/piix.c
index 69860dea3820..bf14f39bd3a7 100644
--- a/drivers/ide/piix.c
+++ b/drivers/ide/piix.c
@@ -98,7 +98,7 @@ static void piix_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		control |= 1;	/* Programmable timing on */
 	if (drive->media == ide_disk)
 		control |= 4;	/* Prefetch, post write */
-	if (pio > 2)
+	if (ide_pio_need_iordy(drive, pio))
 		control |= 2;	/* IORDY */
 	if (is_slave) {
 		master_data |=  0x4000;
diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c
index bd82d228608c..6a643fdf0e6e 100644
--- a/drivers/ide/siimage.c
+++ b/drivers/ide/siimage.c
@@ -32,7 +32,6 @@
  *  smarter code in libata.
  *
  * TODO:
- * - IORDY fixes
  * - VDMA support
  */
 
@@ -234,8 +233,7 @@ static u8 sil_sata_udma_filter(ide_drive_t *drive)
  *	@pio: PIO mode number
  *
  *	Load the timing settings for this device mode into the
- *	controller. If we are in PIO mode 3 or 4 turn on IORDY
- *	monitoring (bit 9). The TF timing is bits 31:16
+ *	controller.
  */
 
 static void sil_set_pio_mode(ide_drive_t *drive, u8 pio)
@@ -276,13 +274,16 @@ static void sil_set_pio_mode(ide_drive_t *drive, u8 pio)
 	/* now set up IORDY */
 	speedp = sil_ioread16(dev, tfaddr - 2);
 	speedp &= ~0x200;
-	if (pio > 2)
-		speedp |= 0x200;
-	sil_iowrite16(dev, speedp, tfaddr - 2);
 
 	mode = sil_ioread8(dev, base + addr_mask);
 	mode &= ~(unit ? 0x30 : 0x03);
-	mode |= unit ? 0x10 : 0x01;
+
+	if (ide_pio_need_iordy(drive, pio)) {
+		speedp |= 0x200;
+		mode |= unit ? 0x10 : 0x01;
+	}
+
+	sil_iowrite16(dev, speedp, tfaddr - 2);
 	sil_iowrite8(dev, mode, base + addr_mask);
 }
 
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 0924abff52ff..88ac47085cd9 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -61,8 +61,7 @@ static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
 	if (cmd_off == 0)
 		cmd_off = 1;
 
-	if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
-	    !(pio > 4 && ata_id_is_cfa(drive->id)))
+	if (ide_pio_need_iordy(drive, pio))
 		iordy = 0x40;
 
 	return (cmd_on - 1) << 8 | (cmd_off - 1) | iordy;
diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c
index f55d7d6313e8..9aec78d3bcff 100644
--- a/drivers/ide/slc90e66.c
+++ b/drivers/ide/slc90e66.c
@@ -44,7 +44,7 @@ static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		control |= 1;	/* Programmable timing on */
 	if (drive->media == ide_disk)
 		control |= 4;	/* Prefetch, post write */
-	if (pio > 2)
+	if (ide_pio_need_iordy(drive, pio))
 		control |= 2;	/* IORDY */
 	if (is_slave) {
 		master_data |=  0x4000;
diff --git a/include/linux/ide.h b/include/linux/ide.h
index cdb29b6c195f..8c7f5e50e912 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1514,6 +1514,7 @@ int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
 int ide_scan_pio_blacklist(char *);
 const char *ide_xfer_verbose(u8);
 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
+int ide_pio_need_iordy(ide_drive_t *, const u8);
 int ide_set_pio_mode(ide_drive_t *, u8);
 int ide_set_dma_mode(ide_drive_t *, u8);
 void ide_set_pio(ide_drive_t *, u8);
-- 
cgit v1.2.3


From 5880b5de7101cc123778c5d17d4f3986351f3122 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Mon, 15 Jun 2009 18:52:54 +0200
Subject: ide: don't enable IORDY at a probe time

* Add 'unsigned long port_flags' field to ide_hwif_t.

* Add IDE_PFLAG_PROBING port flag and keep it set during probing.

* Fix ide_pio_need_iordy() to not enable IORDY at a probe time
  (IORDY may lead to controller lock up on certain controllers
   if the port is not occupied).

Loosely based on the recent libata's fix by Tejun, thanks to Alan
for the hint that IDE may also need it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-probe.c     | 16 +++++++++++++++-
 drivers/ide/ide-xfer-mode.c |  6 ++++++
 include/linux/ide.h         |  6 ++++++
 3 files changed, 27 insertions(+), 1 deletion(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index f371b0de314f..fdd04bcd5568 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1378,6 +1378,9 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
 
 		ide_init_port(hwif, i & 1, d);
 		ide_port_cable_detect(hwif);
+
+		hwif->port_flags |= IDE_PFLAG_PROBING;
+
 		ide_port_init_devices(hwif);
 	}
 
@@ -1388,6 +1391,8 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
 		if (ide_probe_port(hwif) == 0)
 			hwif->present = 1;
 
+		hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
 		if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
 		    hwif->mate == NULL || hwif->mate->present == 0) {
 			if (ide_register_port(hwif)) {
@@ -1569,11 +1574,20 @@ EXPORT_SYMBOL_GPL(ide_host_remove);
 
 void ide_port_scan(ide_hwif_t *hwif)
 {
+	int rc;
+
 	ide_port_apply_params(hwif);
 	ide_port_cable_detect(hwif);
+
+	hwif->port_flags |= IDE_PFLAG_PROBING;
+
 	ide_port_init_devices(hwif);
 
-	if (ide_probe_port(hwif) < 0)
+	rc = ide_probe_port(hwif);
+
+	hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
+	if (rc < 0)
 		return;
 
 	hwif->present = 1;
diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
index 0b47ca139079..46d203ce60cc 100644
--- a/drivers/ide/ide-xfer-mode.c
+++ b/drivers/ide/ide-xfer-mode.c
@@ -109,6 +109,12 @@ EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 
 int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)
 {
+	/*
+	 * IORDY may lead to controller lock up on certain controllers
+	 * if the port is not occupied.
+	 */
+	if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING))
+		return 0;
 	return ata_id_pio_need_iordy(drive->id, pio);
 }
 EXPORT_SYMBOL_GPL(ide_pio_need_iordy);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 8c7f5e50e912..8771d49aa874 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -661,6 +661,10 @@ struct ide_dma_ops {
 	u8	(*dma_sff_read_status)(struct hwif_s *);
 };
 
+enum {
+	IDE_PFLAG_PROBING		= (1 << 0),
+};
+
 struct ide_host;
 
 typedef struct hwif_s {
@@ -677,6 +681,8 @@ typedef struct hwif_s {
 
 	ide_drive_t	*devices[MAX_DRIVES + 1];
 
+	unsigned long	port_flags;
+
 	u8 major;	/* our major number */
 	u8 index;	/* 0 for ide0; 1 for ide1; ... */
 	u8 channel;	/* for dual-port chips: 0=primary, 1=secondary */
-- 
cgit v1.2.3


From f4d3ffa52a402ec9e8699571cf3811763d284459 Mon Sep 17 00:00:00 2001
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Mon, 15 Jun 2009 18:52:58 +0200
Subject: ide: move ack_intr() method into 'struct ide_port_ops' (take 2)

Move the ack_intr() method into 'struct ide_port_ops', also renaming it to
test_irq() while at it...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/buddha.c    | 15 +++++++++------
 drivers/ide/falconide.c |  1 -
 drivers/ide/gayle.c     | 14 +++++++++-----
 drivers/ide/ide-io.c    |  3 ++-
 drivers/ide/ide-probe.c |  1 -
 drivers/ide/macide.c    | 12 ++++--------
 drivers/ide/q40ide.c    |  7 ++-----
 include/linux/ide.h     | 10 +---------
 8 files changed, 27 insertions(+), 36 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/buddha.c b/drivers/ide/buddha.c
index 9cd7b115763d..ab4f169d0837 100644
--- a/drivers/ide/buddha.c
+++ b/drivers/ide/buddha.c
@@ -99,7 +99,7 @@ static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
      *  Check and acknowledge the interrupt status
      */
 
-static int buddha_ack_intr(ide_hwif_t *hwif)
+static int buddha_test_irq(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
@@ -118,8 +118,7 @@ static void xsurf_clear_irq(ide_drive_t *drive)
 }
 
 static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base,
-				      unsigned long ctl, unsigned long irq_port,
-				      ide_ack_intr_t *ack_intr)
+				      unsigned long ctl, unsigned long irq_port)
 {
 	int i;
 
@@ -134,14 +133,19 @@ static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base,
 	hw->io_ports.irq_addr = irq_port;
 
 	hw->irq = IRQ_AMIGA_PORTS;
-	hw->ack_intr = ack_intr;
 }
 
+static const struct ide_port_ops buddha_port_ops = {
+	.test_irq		= buddha_test_irq,
+};
+
 static const struct ide_port_ops xsurf_port_ops = {
 	.clear_irq		= xsurf_clear_irq,
+	.test_irq		= buddha_test_irq,
 };
 
 static const struct ide_port_info buddha_port_info = {
+	.port_ops		= &buddha_port_ops,
 	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
 	.irq_flags		= IRQF_SHARED,
 	.chipset		= ide_generic,
@@ -217,8 +221,7 @@ fail_base2:
 				irq_port = buddha_board + xsurf_irqports[i];
 			}
 
-			buddha_setup_ports(&hw[i], base, ctl, irq_port,
-					   buddha_ack_intr);
+			buddha_setup_ports(&hw[i], base, ctl, irq_port);
 
 			hws[i] = &hw[i];
 		}
diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
index 22fa27389c3b..a5a07ccb81a7 100644
--- a/drivers/ide/falconide.c
+++ b/drivers/ide/falconide.c
@@ -128,7 +128,6 @@ static void __init falconide_setup_ports(struct ide_hw *hw)
 	hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
 
 	hw->irq = IRQ_MFP_IDE;
-	hw->ack_intr = NULL;
 }
 
     /*
diff --git a/drivers/ide/gayle.c b/drivers/ide/gayle.c
index c5dd1e5cca4d..b9e517de6a82 100644
--- a/drivers/ide/gayle.c
+++ b/drivers/ide/gayle.c
@@ -66,7 +66,7 @@ MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
      *  Check and acknowledge the interrupt status
      */
 
-static int gayle_ack_intr(ide_hwif_t *hwif)
+static int gayle_test_irq(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
@@ -85,8 +85,7 @@ static void gayle_a1200_clear_irq(ide_drive_t *drive)
 }
 
 static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
-				     unsigned long ctl, unsigned long irq_port,
-				     ide_ack_intr_t *ack_intr)
+				     unsigned long ctl, unsigned long irq_port)
 {
 	int i;
 
@@ -101,11 +100,15 @@ static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
 	hw->io_ports.irq_addr = irq_port;
 
 	hw->irq = IRQ_AMIGA_PORTS;
-	hw->ack_intr = ack_intr;
 }
 
+static const struct ide_port_ops gayle_a4000_port_ops = {
+	.test_irq		= gayle_test_irq,
+};
+
 static const struct ide_port_ops gayle_a1200_port_ops = {
 	.clear_irq		= gayle_a1200_clear_irq,
+	.test_irq		= gayle_test_irq,
 };
 
 static const struct ide_port_info gayle_port_info = {
@@ -148,6 +151,7 @@ found:
 	if (a4000) {
 	    phys_base = GAYLE_BASE_4000;
 	    irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
+	    d.port_ops = &gayle_a4000_port_ops;
 	} else {
 	    phys_base = GAYLE_BASE_1200;
 	    irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
@@ -164,7 +168,7 @@ found:
 	base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
 	ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
 
-	gayle_setup_ports(&hw[i], base, ctrlport, irqport, gayle_ack_intr);
+	gayle_setup_ports(&hw[i], base, ctrlport, irqport);
 
 	hws[i] = &hw[i];
     }
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 9e53efe9fb2d..1059f809b809 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -804,7 +804,8 @@ irqreturn_t ide_intr (int irq, void *dev_id)
 
 	spin_lock_irqsave(&hwif->lock, flags);
 
-	if (hwif->ack_intr && hwif->ack_intr(hwif) == 0)
+	if (hwif->port_ops && hwif->port_ops->test_irq &&
+	    hwif->port_ops->test_irq(hwif) == 0)
 		goto out;
 
 	handler = hwif->handler;
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index fdd04bcd5568..c2e7159d7930 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1170,7 +1170,6 @@ static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
 	hwif->irq = hw->irq;
 	hwif->dev = hw->dev;
 	hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
-	hwif->ack_intr = hw->ack_intr;
 	hwif->config_data = hw->config;
 }
 
diff --git a/drivers/ide/macide.c b/drivers/ide/macide.c
index 05cdab35a75c..505ec43e5606 100644
--- a/drivers/ide/macide.c
+++ b/drivers/ide/macide.c
@@ -53,7 +53,7 @@
 
 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
 
-int macide_ack_intr(ide_hwif_t* hwif)
+int macide_test_irq(ide_hwif_t *hwif)
 {
 	if (*ide_ifr & 0x20)
 		return 1;
@@ -66,7 +66,7 @@ static void macide_clear_irq(ide_drive_t *drive)
 }
 
 static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
-				      int irq, ide_ack_intr_t *ack_intr)
+				      int irq)
 {
 	int i;
 
@@ -78,11 +78,11 @@ static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
 	hw->io_ports.ctl_addr = base + IDE_CONTROL;
 
 	hw->irq = irq;
-	hw->ack_intr = ack_intr;
 }
 
 static const struct ide_port_ops macide_port_ops = {
 	.clear_irq		= macide_clear_irq,
+	.test_irq		= macide_test_irq,
 };
 
 static const struct ide_port_info macide_port_info = {
@@ -101,7 +101,6 @@ static const char *mac_ide_name[] =
 
 static int __init macide_init(void)
 {
-	ide_ack_intr_t *ack_intr;
 	unsigned long base;
 	int irq;
 	struct ide_hw hw, *hws[] = { &hw };
@@ -113,17 +112,14 @@ static int __init macide_init(void)
 	switch (macintosh_config->ide_type) {
 	case MAC_IDE_QUADRA:
 		base = IDE_BASE;
-		ack_intr = macide_ack_intr;
 		irq = IRQ_NUBUS_F;
 		break;
 	case MAC_IDE_PB:
 		base = IDE_BASE;
-		ack_intr = macide_ack_intr;
 		irq = IRQ_NUBUS_C;
 		break;
 	case MAC_IDE_BABOON:
 		base = BABOON_BASE;
-		ack_intr = NULL;
 		d.port_ops = NULL;
 		irq = IRQ_BABOON_1;
 		break;
@@ -134,7 +130,7 @@ static int __init macide_init(void)
 	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
 			 mac_ide_name[macintosh_config->ide_type - 1]);
 
-	macide_setup_ports(&hw, base, irq, ack_intr);
+	macide_setup_ports(&hw, base, irq);
 
 	return ide_host_add(&d, hws, 1, NULL);
 }
diff --git a/drivers/ide/q40ide.c b/drivers/ide/q40ide.c
index ab49a97023d9..90786083b439 100644
--- a/drivers/ide/q40ide.c
+++ b/drivers/ide/q40ide.c
@@ -51,9 +51,7 @@ static int q40ide_default_irq(unsigned long base)
 /*
  * Addresses are pretranslated for Q40 ISA access.
  */
-static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base,
-			ide_ack_intr_t *ack_intr,
-			int irq)
+static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base, int irq)
 {
 	memset(hw, 0, sizeof(*hw));
 	/* BIG FAT WARNING: 
@@ -69,7 +67,6 @@ static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base,
 	hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
 
 	hw->irq = irq;
-	hw->ack_intr = ack_intr;
 }
 
 static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
@@ -156,7 +153,7 @@ static int __init q40ide_init(void)
 		release_region(pcide_bases[i], 8);
 		continue;
 	}
-	q40_ide_setup_ports(&hw[i], pcide_bases[i], NULL,
+	q40_ide_setup_ports(&hw[i], pcide_bases[i],
 			q40ide_default_irq(pcide_bases[i]));
 
 	hws[i] = &hw[i];
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 8771d49aa874..08c91e21cf47 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -156,12 +156,6 @@ enum {
 #define REQ_PARK_HEADS		0x22
 #define REQ_UNPARK_HEADS	0x23
 
-/*
- * Check for an interrupt and acknowledge the interrupt status
- */
-struct hwif_s;
-typedef int (ide_ack_intr_t)(struct hwif_s *);
-
 /*
  * hwif_chipset_t is used to keep track of the specific hardware
  * chipset used by each IDE interface, if known.
@@ -185,7 +179,6 @@ struct ide_hw {
 	};
 
 	int		irq;			/* our irq number */
-	ide_ack_intr_t	*ack_intr;		/* acknowledge interrupt */
 	struct device	*dev, *parent;
 	unsigned long	config;
 };
@@ -636,6 +629,7 @@ struct ide_port_ops {
 	void	(*maskproc)(ide_drive_t *, int);
 	void	(*quirkproc)(ide_drive_t *);
 	void	(*clear_irq)(ide_drive_t *);
+	int	(*test_irq)(struct hwif_s *);
 
 	u8	(*mdma_filter)(ide_drive_t *);
 	u8	(*udma_filter)(ide_drive_t *);
@@ -701,8 +695,6 @@ typedef struct hwif_s {
 
 	struct device *dev;
 
-	ide_ack_intr_t *ack_intr;
-
 	void (*rw_disk)(ide_drive_t *, struct request *);
 
 	const struct ide_tp_ops		*tp_ops;
-- 
cgit v1.2.3


From 5bfb151f1f565e6082304a30e8c81dfb6ed0b0c8 Mon Sep 17 00:00:00 2001
From: Joao Ramos <joao.ramos@inov.pt>
Date: Mon, 15 Jun 2009 22:13:44 +0200
Subject: ide: do not access ide_drive_t 'drive_data' field directly

Change ide_drive_t 'drive_data' field from 'unsigned int' type to 'void *'
type, allowing a wider range of values/types to be stored in this field.

Added 'ide_get_drivedata' and 'ide_set_drivedata' helpers to get and set
the 'drive_data' field.

Fixed all host drivers to maintain coherency with the change in the
'drive_data' field type.

Signed-off-by: Joao Ramos <joao.ramos@inov.pt>
[bart: fix qd65xx build, cast to 'unsigned long', minor Coding Style fixups]
Acked-by: Sergei Shtylyov <sshtylyov@ru.montavista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/cmd64x.c   |  8 +++++---
 drivers/ide/cs5536.c   | 23 +++++++++++++++--------
 drivers/ide/ht6560b.c  | 33 ++++++++++++++++++++++++---------
 drivers/ide/icside.c   | 10 ++++++----
 drivers/ide/opti621.c  |  8 +++++---
 drivers/ide/qd65xx.c   | 11 +++++++----
 drivers/ide/qd65xx.h   | 11 +++++++++--
 drivers/ide/sl82c105.c | 18 ++++++++++++------
 include/linux/ide.h    | 12 +++++++++++-
 9 files changed, 94 insertions(+), 40 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
index fd904e923a9f..03c86209446f 100644
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -118,8 +118,9 @@ static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
 	ide_hwif_t *hwif	= drive->hwif;
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	struct ide_timing *t	= ide_timing_find_mode(XFER_PIO_0 + pio);
+	unsigned long setup_count;
 	unsigned int cycle_time;
-	u8 setup_count, arttim = 0;
+	u8 arttim = 0;
 
 	static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
 	static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
@@ -140,10 +141,11 @@ static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
 	if (hwif->channel) {
 		ide_drive_t *pair = ide_get_pair_dev(drive);
 
-		drive->drive_data = setup_count;
+		ide_set_drivedata(drive, (void *)setup_count);
 
 		if (pair)
-			setup_count = max_t(u8, setup_count, pair->drive_data);
+			setup_count = max_t(u8, setup_count,
+					(unsigned long)ide_get_drivedata(pair));
 	}
 
 	if (setup_count > 5)		/* shouldn't actually happen... */
diff --git a/drivers/ide/cs5536.c b/drivers/ide/cs5536.c
index 0332a95eefd4..9623b852c616 100644
--- a/drivers/ide/cs5536.c
+++ b/drivers/ide/cs5536.c
@@ -146,14 +146,16 @@ static void cs5536_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
 	ide_drive_t *pair = ide_get_pair_dev(drive);
 	int cshift = (drive->dn & 1) ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
 	u32 cast;
 	u8 cmd_pio = pio;
 
 	if (pair)
 		cmd_pio = min(pio, ide_get_best_pio_mode(pair, 255, 4));
 
-	drive->drive_data &= (IDE_DRV_MASK << 8);
-	drive->drive_data |= drv_timings[pio];
+	timings &= (IDE_DRV_MASK << 8);
+	timings |= drv_timings[pio];
+	ide_set_drivedata(drive, (void *)timings);
 
 	cs5536_program_dtc(drive, drv_timings[pio]);
 
@@ -186,6 +188,7 @@ static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
 
 	struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
 	int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
 	u32 etc;
 
 	cs5536_read(pdev, ETC, &etc);
@@ -195,8 +198,9 @@ static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
 		etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
 	} else { /* MWDMA */
 		etc &= ~(IDE_ETC_UDMA_MASK << dshift);
-		drive->drive_data &= IDE_DRV_MASK;
-		drive->drive_data |= mwdma_timings[mode - XFER_MW_DMA_0] << 8;
+		timings &= IDE_DRV_MASK;
+		timings |= mwdma_timings[mode - XFER_MW_DMA_0] << 8;
+		ide_set_drivedata(drive, (void *)timings);
 	}
 
 	cs5536_write(pdev, ETC, etc);
@@ -204,9 +208,11 @@ static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
 
 static void cs5536_dma_start(ide_drive_t *drive)
 {
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+
 	if (drive->current_speed < XFER_UDMA_0 &&
-	    (drive->drive_data >> 8) != (drive->drive_data & IDE_DRV_MASK))
-		cs5536_program_dtc(drive, drive->drive_data >> 8);
+	    (timings >> 8) != (timings & IDE_DRV_MASK))
+		cs5536_program_dtc(drive, timings >> 8);
 
 	ide_dma_start(drive);
 }
@@ -214,10 +220,11 @@ static void cs5536_dma_start(ide_drive_t *drive)
 static int cs5536_dma_end(ide_drive_t *drive)
 {
 	int ret = ide_dma_end(drive);
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
 
 	if (drive->current_speed < XFER_UDMA_0 &&
-	    (drive->drive_data >> 8) != (drive->drive_data & IDE_DRV_MASK))
-		cs5536_program_dtc(drive, drive->drive_data & IDE_DRV_MASK);
+	    (timings >> 8) != (timings & IDE_DRV_MASK))
+		cs5536_program_dtc(drive, timings & IDE_DRV_MASK);
 
 	return ret;
 }
diff --git a/drivers/ide/ht6560b.c b/drivers/ide/ht6560b.c
index 2fb0f2965009..aafed8060e17 100644
--- a/drivers/ide/ht6560b.c
+++ b/drivers/ide/ht6560b.c
@@ -44,7 +44,12 @@
  *    bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time	      (?)
  */
 #define HT_CONFIG_PORT	  0x3e6
-#define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
+
+static inline u8 HT_CONFIG(ide_drive_t *drive)
+{
+	return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;
+}
+
 /*
  * FIFO + PREFETCH (both a/b-model)
  */
@@ -90,7 +95,11 @@
  * Active Time for each drive. Smaller value gives higher speed.
  * In case of failures you should probably fall back to a higher value.
  */
-#define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
+static inline u8 HT_TIMING(ide_drive_t *drive)
+{
+	return (unsigned long)ide_get_drivedata(drive) & 0x00ff;
+}
+
 #define HT_TIMING_DEFAULT 0xff
 
 /*
@@ -242,23 +251,27 @@ static DEFINE_SPINLOCK(ht6560b_lock);
  */
 static void ht_set_prefetch(ide_drive_t *drive, u8 state)
 {
-	unsigned long flags;
+	unsigned long flags, config;
 	int t = HT_PREFETCH_MODE << 8;
 
 	spin_lock_irqsave(&ht6560b_lock, flags);
 
+	config = (unsigned long)ide_get_drivedata(drive);
+
 	/*
 	 *  Prefetch mode and unmask irq seems to conflict
 	 */
 	if (state) {
-		drive->drive_data |= t;   /* enable prefetch mode */
+		config |= t;   /* enable prefetch mode */
 		drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
 		drive->dev_flags &= ~IDE_DFLAG_UNMASK;
 	} else {
-		drive->drive_data &= ~t;  /* disable prefetch mode */
+		config &= ~t;  /* disable prefetch mode */
 		drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;
 	}
 
+	ide_set_drivedata(drive, (void *)config);
+
 	spin_unlock_irqrestore(&ht6560b_lock, flags);
 
 #ifdef DEBUG
@@ -268,7 +281,7 @@ static void ht_set_prefetch(ide_drive_t *drive, u8 state)
 
 static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
-	unsigned long flags;
+	unsigned long flags, config;
 	u8 timing;
 	
 	switch (pio) {
@@ -281,8 +294,10 @@ static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	timing = ht_pio2timings(drive, pio);
 
 	spin_lock_irqsave(&ht6560b_lock, flags);
-	drive->drive_data &= 0xff00;
-	drive->drive_data |= timing;
+	config = (unsigned long)ide_get_drivedata(drive);
+	config &= 0xff00;
+	config |= timing;
+	ide_set_drivedata(drive, (void *)config);
 	spin_unlock_irqrestore(&ht6560b_lock, flags);
 
 #ifdef DEBUG
@@ -299,7 +314,7 @@ static void __init ht6560b_init_dev(ide_drive_t *drive)
 	if (hwif->channel)
 		t |= (HT_SECONDARY_IF << 8);
 
-	drive->drive_data = t;
+	ide_set_drivedata(drive, (void *)t);
 }
 
 static int probe_ht6560b;
diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index 5af3d0ffaf0a..0f67f1abbbd3 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -187,7 +187,8 @@ static const expansioncard_ops_t icside_ops_arcin_v6 = {
  */
 static void icside_set_dma_mode(ide_drive_t *drive, const u8 xfer_mode)
 {
-	int cycle_time, use_dma_info = 0;
+	unsigned long cycle_time;
+	int use_dma_info = 0;
 
 	switch (xfer_mode) {
 	case XFER_MW_DMA_2:
@@ -218,10 +219,11 @@ static void icside_set_dma_mode(ide_drive_t *drive, const u8 xfer_mode)
 	if (use_dma_info && drive->id[ATA_ID_EIDE_DMA_TIME] > cycle_time)
 		cycle_time = drive->id[ATA_ID_EIDE_DMA_TIME];
 
-	drive->drive_data = cycle_time;
+	ide_set_drivedata(drive, (void *)cycle_time);
 
 	printk("%s: %s selected (peak %dMB/s)\n", drive->name,
-		ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
+		ide_xfer_verbose(xfer_mode),
+		2000 / (unsigned long)ide_get_drivedata(drive));
 }
 
 static const struct ide_port_ops icside_v6_port_ops = {
@@ -277,7 +279,7 @@ static int icside_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
 	/*
 	 * Select the correct timing for this drive.
 	 */
-	set_dma_speed(ec->dma, drive->drive_data);
+	set_dma_speed(ec->dma, (unsigned long)ide_get_drivedata(drive));
 
 	/*
 	 * Tell the DMA engine about the SG table and
diff --git a/drivers/ide/opti621.c b/drivers/ide/opti621.c
index 6048eda3cd61..f1d70d6630fe 100644
--- a/drivers/ide/opti621.c
+++ b/drivers/ide/opti621.c
@@ -138,6 +138,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	ide_hwif_t *hwif = drive->hwif;
 	ide_drive_t *pair = ide_get_pair_dev(drive);
 	unsigned long flags;
+	unsigned long mode = XFER_PIO_0 + pio, pair_mode;
 	u8 tim, misc, addr_pio = pio, clk;
 
 	/* DRDY is default 2 (by OPTi Databook) */
@@ -150,11 +151,12 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		{ 0x48, 0x34, 0x21, 0x10, 0x10 }	/* 25 MHz */
 	};
 
-	drive->drive_data = XFER_PIO_0 + pio;
+	ide_set_drivedata(drive, (void *)mode);
 
 	if (pair) {
-		if (pair->drive_data && pair->drive_data < drive->drive_data)
-			addr_pio = pair->drive_data - XFER_PIO_0;
+		pair_mode = (unsigned long)ide_get_drivedata(pair);
+		if (pair_mode && pair_mode < mode)
+			addr_pio = pair_mode - XFER_PIO_0;
 	}
 
 	spin_lock_irqsave(&opti621_lock, flags);
diff --git a/drivers/ide/qd65xx.c b/drivers/ide/qd65xx.c
index c9a134986891..74696edc8d1d 100644
--- a/drivers/ide/qd65xx.c
+++ b/drivers/ide/qd65xx.c
@@ -180,8 +180,11 @@ static int qd_find_disk_type (ide_drive_t *drive,
 
 static void qd_set_timing (ide_drive_t *drive, u8 timing)
 {
-	drive->drive_data &= 0xff00;
-	drive->drive_data |= timing;
+	unsigned long data = (unsigned long)ide_get_drivedata(drive);
+
+	data &= 0xff00;
+	data |= timing;
+	ide_set_drivedata(drive, (void *)data);
 
 	printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
 }
@@ -292,7 +295,7 @@ static void __init qd6500_init_dev(ide_drive_t *drive)
 	u8 base = (hwif->config_data & 0xff00) >> 8;
 	u8 config = QD_CONFIG(hwif);
 
-	drive->drive_data = QD6500_DEF_DATA;
+	ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
 }
 
 static void __init qd6580_init_dev(ide_drive_t *drive)
@@ -308,7 +311,7 @@ static void __init qd6580_init_dev(ide_drive_t *drive)
 	} else
 		t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
 
-	drive->drive_data = (drive->dn & 1) ? t2 : t1;
+	ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
 }
 
 static const struct ide_tp_ops qd65xx_tp_ops = {
diff --git a/drivers/ide/qd65xx.h b/drivers/ide/qd65xx.h
index d7e67a1a1dcc..1fba2a5f281c 100644
--- a/drivers/ide/qd65xx.h
+++ b/drivers/ide/qd65xx.h
@@ -31,8 +31,15 @@
 
 #define QD_CONFIG(hwif)		((hwif)->config_data & 0x00ff)
 
-#define QD_TIMING(drive)	(u8)(((drive)->drive_data) & 0x00ff)
-#define QD_TIMREG(drive)	(u8)((((drive)->drive_data) & 0xff00) >> 8)
+static inline u8 QD_TIMING(ide_drive_t *drive)
+{
+	return (unsigned long)ide_get_drivedata(drive) & 0x00ff;
+}
+
+static inline u8 QD_TIMREG(ide_drive_t *drive)
+{
+	return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;
+}
 
 #define QD6500_DEF_DATA		((QD_TIM1_PORT<<8) | (QD_ID3 ? 0x0c : 0x08))
 #define QD6580_DEF_DATA		((QD_TIM1_PORT<<8) | (QD_ID3 ? 0x0a : 0x00))
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 6246bea585c4..d698da470d6f 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -73,6 +73,7 @@ static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
 static void sl82c105_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
 	struct pci_dev *dev	= to_pci_dev(drive->hwif->dev);
+	unsigned long timings	= (unsigned long)ide_get_drivedata(drive);
 	int reg			= 0x44 + drive->dn * 4;
 	u16 drv_ctrl;
 
@@ -82,8 +83,9 @@ static void sl82c105_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	 * Store the PIO timings so that we can restore them
 	 * in case DMA will be turned off...
 	 */
-	drive->drive_data &= 0xffff0000;
-	drive->drive_data |= drv_ctrl;
+	timings &= 0xffff0000;
+	timings |= drv_ctrl;
+	ide_set_drivedata(drive, (void *)timings);
 
 	pci_write_config_word(dev, reg,  drv_ctrl);
 	pci_read_config_word (dev, reg, &drv_ctrl);
@@ -99,6 +101,7 @@ static void sl82c105_set_pio_mode(ide_drive_t *drive, const u8 pio)
 static void sl82c105_set_dma_mode(ide_drive_t *drive, const u8 speed)
 {
 	static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200};
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
 	u16 drv_ctrl;
 
  	DBG(("sl82c105_tune_chipset(drive:%s, speed:%s)\n",
@@ -110,8 +113,9 @@ static void sl82c105_set_dma_mode(ide_drive_t *drive, const u8 speed)
 	 * Store the DMA timings so that we can actually program
 	 * them when DMA will be turned on...
 	 */
-	drive->drive_data &= 0x0000ffff;
-	drive->drive_data |= (unsigned long)drv_ctrl << 16;
+	timings &= 0x0000ffff;
+	timings |= (unsigned long)drv_ctrl << 16;
+	ide_set_drivedata(drive, (void *)timings);
 }
 
 static int sl82c105_test_irq(ide_hwif_t *hwif)
@@ -194,7 +198,8 @@ static void sl82c105_dma_start(ide_drive_t *drive)
 
 	DBG(("%s(drive:%s)\n", __func__, drive->name));
 
-	pci_write_config_word(dev, reg, drive->drive_data >> 16);
+	pci_write_config_word(dev, reg,
+			      (unsigned long)ide_get_drivedata(drive) >> 16);
 
 	sl82c105_reset_host(dev);
 	ide_dma_start(drive);
@@ -219,7 +224,8 @@ static int sl82c105_dma_end(ide_drive_t *drive)
 
 	ret = ide_dma_end(drive);
 
-	pci_write_config_word(dev, reg, drive->drive_data);
+	pci_write_config_word(dev, reg,
+			      (unsigned long)ide_get_drivedata(drive));
 
 	return ret;
 }
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 08c91e21cf47..95c6e00a72e8 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -532,7 +532,7 @@ struct ide_drive_s {
 
 	unsigned int	bios_cyl;	/* BIOS/fdisk/LILO number of cyls */
 	unsigned int	cyl;		/* "real" number of cyls */
-	unsigned int	drive_data;	/* used by set_pio_mode/dev_select() */
+	void		*drive_data;	/* used by set_pio_mode/dev_select() */
 	unsigned int	failures;	/* current failure count */
 	unsigned int	max_failures;	/* maximum allowed failure count */
 	u64		probed_capacity;/* initial/native media capacity */
@@ -1550,6 +1550,16 @@ static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
 	return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
 }
 
+static inline void *ide_get_drivedata(ide_drive_t *drive)
+{
+	return drive->drive_data;
+}
+
+static inline void ide_set_drivedata(ide_drive_t *drive, void *data)
+{
+	drive->drive_data = data;
+}
+
 #define ide_port_for_each_dev(i, dev, port) \
 	for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++)
 
-- 
cgit v1.2.3


From 346c17a6cf60375323adfaa4b8a9d841049f890e Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Mon, 22 Jun 2009 07:38:26 +0000
Subject: ide: relax DMA info validity checking

There are some broken devices that report multiple DMA xfer modes
enabled at once (ATA spec doesn't allow it) but otherwise work fine
with DMA so just delete ide_id_dma_bug().

[ As discovered by detective work by Frans and Bart, due to how
  handling of the ID block was handled before commit c419993
  ("ide-iops: only clear DMA words on setting DMA mode") this
  check was always seeing zeros in the fields or other similar
  garbage.  Therefore this check wasn't actually checking anything.
  Now that the tests actually check the real bits, all we see are
  devices that trigger the check yet work perfectly fine, therefore
  killing this useless check is the best thing to do. -DaveM ]

Reported-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/ide/ide-dma.c  | 21 ---------------------
 drivers/ide/ide-iops.c |  3 ---
 include/linux/ide.h    |  2 --
 3 files changed, 26 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 219e6fb78dc6..ee58c88dee5a 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -361,9 +361,6 @@ static int ide_tune_dma(ide_drive_t *drive)
 	if (__ide_dma_bad_drive(drive))
 		return 0;
 
-	if (ide_id_dma_bug(drive))
-		return 0;
-
 	if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
 		return config_drive_for_dma(drive);
 
@@ -394,24 +391,6 @@ static int ide_dma_check(ide_drive_t *drive)
 	return -1;
 }
 
-int ide_id_dma_bug(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-
-	if (id[ATA_ID_FIELD_VALID] & 4) {
-		if ((id[ATA_ID_UDMA_MODES] >> 8) &&
-		    (id[ATA_ID_MWDMA_MODES] >> 8))
-			goto err_out;
-	} else if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
-		   (id[ATA_ID_SWDMA_MODES] >> 8))
-		goto err_out;
-
-	return 0;
-err_out:
-	printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name);
-	return 1;
-}
-
 int ide_set_dma(ide_drive_t *drive)
 {
 	int rc;
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index fa047150a1c6..917186ec4966 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -329,9 +329,6 @@ int ide_driveid_update(ide_drive_t *drive)
 
 	kfree(id);
 
-	if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
-		ide_dma_off(drive);
-
 	return 1;
 out_err:
 	if (rc == 2)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 95c6e00a72e8..cf1f3888067c 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1361,7 +1361,6 @@ int ide_in_drive_list(u16 *, const struct drive_list_entry *);
 #ifdef CONFIG_BLK_DEV_IDEDMA
 int ide_dma_good_drive(ide_drive_t *);
 int __ide_dma_bad_drive(ide_drive_t *);
-int ide_id_dma_bug(ide_drive_t *);
 
 u8 ide_find_dma_mode(ide_drive_t *, u8);
 
@@ -1402,7 +1401,6 @@ void ide_dma_lost_irq(ide_drive_t *);
 ide_startstop_t ide_dma_timeout_retry(ide_drive_t *, int);
 
 #else
-static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
-- 
cgit v1.2.3


From 5e955245d6cf49c5ed26c7add7392ff5a6762bf4 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Tue, 23 Jun 2009 11:27:27 +0000
Subject: ide: always kill the whole request on error

* Use blk_rq_bytes() instead of obsolete ide_rq_bytes() in ide_kill_rq()
  and ide_floppy_do_request() for failed requests.
  [ bugfix part ]

* Use blk_rq_bytes() instead of obsolete ide_rq_bytes() in ide_do_devset()
  and ide_complete_drive_reset().  Then remove ide_rq_bytes().
  [ cleanup part ]

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/ide/ide-devsets.c |  2 +-
 drivers/ide/ide-eh.c      |  2 +-
 drivers/ide/ide-floppy.c  |  2 +-
 drivers/ide/ide-io.c      | 14 ++------------
 include/linux/ide.h       |  1 -
 5 files changed, 5 insertions(+), 16 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index 5bf958e5b1d5..1099bf7cf968 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -183,6 +183,6 @@ ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
 	err = setfunc(drive, *(int *)&rq->cmd[1]);
 	if (err)
 		rq->errors = err;
-	ide_complete_rq(drive, err, ide_rq_bytes(rq));
+	ide_complete_rq(drive, err, blk_rq_bytes(rq));
 	return ide_stopped;
 }
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index 2b9141979613..e9abf2c3c335 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -149,7 +149,7 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
 	if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) {
 		if (err <= 0 && rq->errors == 0)
 			rq->errors = -EIO;
-		ide_complete_rq(drive, err ? err : 0, ide_rq_bytes(rq));
+		ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));
 	}
 }
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 8b3f204f7d73..fefbdfc8db06 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -293,7 +293,7 @@ out_end:
 	drive->failed_pc = NULL;
 	if (blk_fs_request(rq) == 0 && rq->errors == 0)
 		rq->errors = -EIO;
-	ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
+	ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
 	return ide_stopped;
 }
 
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 95db5f03f6a2..d5f3c77beadd 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -112,16 +112,6 @@ void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
 	}
 }
 
-/* obsolete, blk_rq_bytes() should be used instead */
-unsigned int ide_rq_bytes(struct request *rq)
-{
-	if (blk_pc_request(rq))
-		return blk_rq_bytes(rq);
-	else
-		return blk_rq_cur_sectors(rq) << 9;
-}
-EXPORT_SYMBOL_GPL(ide_rq_bytes);
-
 int ide_complete_rq(ide_drive_t *drive, int error, unsigned int nr_bytes)
 {
 	ide_hwif_t *hwif = drive->hwif;
@@ -152,14 +142,14 @@ void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 
 	if ((media == ide_floppy || media == ide_tape) && drv_req) {
 		rq->errors = 0;
-		ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
 	} else {
 		if (media == ide_tape)
 			rq->errors = IDE_DRV_ERROR_GENERAL;
 		else if (blk_fs_request(rq) == 0 && rq->errors == 0)
 			rq->errors = -EIO;
-		ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
 	}
+
+	ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
 }
 
 static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index cf1f3888067c..c6af7c44d46c 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1062,7 +1062,6 @@ int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned l
 extern int ide_vlb_clk;
 extern int ide_pci_clk;
 
-unsigned int ide_rq_bytes(struct request *);
 int ide_end_rq(ide_drive_t *, struct request *, int, unsigned int);
 void ide_kill_rq(ide_drive_t *, struct request *);
 
-- 
cgit v1.2.3


From 2bf427b25b79eb7cea27963a66c3d4684cae0e0c Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Mon, 29 Jun 2009 19:20:42 -0700
Subject: ide: fix resume for CONFIG_BLK_DEV_IDEACPI=y

commit 2f0d0fd2a605666d38e290c5c0d2907484352dc4 ("ide-acpi: cleanup
do_drive_get_GTF()") didn't account for the lack of hwif->acpidata
check in generic_ide_suspend() [ indirect user of do_drive_get_GTF()
through ide_acpi_exec_tfs() ] resulting in broken resume when ACPI
support is enabled but ACPI data is unavailable.

Fix it by adding ide_port_acpi() helper for checking if port needs
ACPI handling and cleaning generic_ide_{suspend,resume}() to use it
instead of hiding hwif->acpidata and ide_noacpi checks in IDE ACPI
helpers (this should help in preventing similar bugs in the future).

While at it:
- kill superfluous debugging printks in ide_acpi_{get,push}_timing()

Reported-and-tested-by: Etienne Basset <etienne.basset@numericable.fr>
Also-reported-and-tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/ide/ide-acpi.c | 37 +++++++------------------------------
 drivers/ide/ide-pm.c   | 30 ++++++++++++++++++------------
 include/linux/ide.h    |  2 ++
 3 files changed, 27 insertions(+), 42 deletions(-)

(limited to 'include/linux/ide.h')

diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
index 77f79d26b264..c509c9916464 100644
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -92,6 +92,11 @@ int ide_acpi_init(void)
 	return 0;
 }
 
+bool ide_port_acpi(ide_hwif_t *hwif)
+{
+	return ide_noacpi == 0 && hwif->acpidata;
+}
+
 /**
  * ide_get_dev_handle - finds acpi_handle and PCI device.function
  * @dev: device to locate
@@ -352,9 +357,6 @@ int ide_acpi_exec_tfs(ide_drive_t *drive)
 	unsigned long	gtf_address;
 	unsigned long	obj_loc;
 
-	if (ide_noacpi)
-		return 0;
-
 	DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn);
 
 	ret = do_drive_get_GTF(drive, &gtf_length, &gtf_address, &obj_loc);
@@ -389,16 +391,6 @@ void ide_acpi_get_timing(ide_hwif_t *hwif)
 	struct acpi_buffer	output;
 	union acpi_object 	*out_obj;
 
-	if (ide_noacpi)
-		return;
-
-	DEBPRINT("ENTER:\n");
-
-	if (!hwif->acpidata) {
-		DEBPRINT("no ACPI data for %s\n", hwif->name);
-		return;
-	}
-
 	/* Setting up output buffer for _GTM */
 	output.length = ACPI_ALLOCATE_BUFFER;
 	output.pointer = NULL;	/* ACPI-CA sets this; save/free it later */
@@ -479,16 +471,6 @@ void ide_acpi_push_timing(ide_hwif_t *hwif)
 	struct ide_acpi_drive_link	*master = &hwif->acpidata->master;
 	struct ide_acpi_drive_link	*slave = &hwif->acpidata->slave;
 
-	if (ide_noacpi)
-		return;
-
-	DEBPRINT("ENTER:\n");
-
-	if (!hwif->acpidata) {
-		DEBPRINT("no ACPI data for %s\n", hwif->name);
-		return;
-	}
-
 	/* Give the GTM buffer + drive Identify data to the channel via the
 	 * _STM method: */
 	/* setup input parameters buffer for _STM */
@@ -527,16 +509,11 @@ void ide_acpi_set_state(ide_hwif_t *hwif, int on)
 	ide_drive_t *drive;
 	int i;
 
-	if (ide_noacpi || ide_noacpi_psx)
+	if (ide_noacpi_psx)
 		return;
 
 	DEBPRINT("ENTER:\n");
 
-	if (!hwif->acpidata) {
-		DEBPRINT("no ACPI data for %s\n", hwif->name);
-		return;
-	}
-
 	/* channel first and then drives for power on and verse versa for power off */
 	if (on)
 		acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
@@ -616,7 +593,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif)
 				 drive->name, err);
 	}
 
-	if (!ide_acpionboot) {
+	if (ide_noacpi || ide_acpionboot == 0) {
 		DEBPRINT("ACPI methods disabled on boot\n");
 		return;
 	}
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index c14ca144cffe..ad7be2669dcb 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -10,9 +10,11 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 	struct request_pm_state rqpm;
 	int ret;
 
-	/* call ACPI _GTM only once */
-	if ((drive->dn & 1) == 0 || pair == NULL)
-		ide_acpi_get_timing(hwif);
+	if (ide_port_acpi(hwif)) {
+		/* call ACPI _GTM only once */
+		if ((drive->dn & 1) == 0 || pair == NULL)
+			ide_acpi_get_timing(hwif);
+	}
 
 	memset(&rqpm, 0, sizeof(rqpm));
 	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
@@ -26,9 +28,11 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 	ret = blk_execute_rq(drive->queue, NULL, rq, 0);
 	blk_put_request(rq);
 
-	/* call ACPI _PS3 only after both devices are suspended */
-	if (ret == 0 && ((drive->dn & 1) || pair == NULL))
-		ide_acpi_set_state(hwif, 0);
+	if (ret == 0 && ide_port_acpi(hwif)) {
+		/* call ACPI _PS3 only after both devices are suspended */
+		if ((drive->dn & 1) || pair == NULL)
+			ide_acpi_set_state(hwif, 0);
+	}
 
 	return ret;
 }
@@ -42,13 +46,15 @@ int generic_ide_resume(struct device *dev)
 	struct request_pm_state rqpm;
 	int err;
 
-	/* call ACPI _PS0 / _STM only once */
-	if ((drive->dn & 1) == 0 || pair == NULL) {
-		ide_acpi_set_state(hwif, 1);
-		ide_acpi_push_timing(hwif);
-	}
+	if (ide_port_acpi(hwif)) {
+		/* call ACPI _PS0 / _STM only once */
+		if ((drive->dn & 1) == 0 || pair == NULL) {
+			ide_acpi_set_state(hwif, 1);
+			ide_acpi_push_timing(hwif);
+		}
 
-	ide_acpi_exec_tfs(drive);
+		ide_acpi_exec_tfs(drive);
+	}
 
 	memset(&rqpm, 0, sizeof(rqpm));
 	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index c6af7c44d46c..edc93a6d931d 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1419,6 +1419,7 @@ static inline void ide_dma_unmap_sg(ide_drive_t *drive,
 
 #ifdef CONFIG_BLK_DEV_IDEACPI
 int ide_acpi_init(void);
+bool ide_port_acpi(ide_hwif_t *hwif);
 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
@@ -1427,6 +1428,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *);
 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
 #else
 static inline int ide_acpi_init(void) { return 0; }
+static inline bool ide_port_acpi(ide_hwif_t *hwif) { return 0; }
 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
-- 
cgit v1.2.3