From f5ad56145d43cdb68760bba3e14655ff6ae726aa Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jun 2005 13:40:08 +0200 Subject: [SCSI] remove scsi_cmnd->abort_reason Never used for anything but printing it out in debug routines. Signed-off-by: James Bottomley --- drivers/scsi/scsi_lib.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 621dee8b8cb2..b4f320854d66 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -301,7 +301,6 @@ static int scsi_init_cmd_errh(struct scsi_cmnd *cmd) { cmd->owner = SCSI_OWNER_MIDLEVEL; cmd->serial_number = 0; - cmd->abort_reason = 0; memset(cmd->sense_buffer, 0, sizeof cmd->sense_buffer); @@ -322,7 +321,6 @@ static int scsi_init_cmd_errh(struct scsi_cmnd *cmd) memcpy(cmd->data_cmnd, cmd->cmnd, sizeof(cmd->cmnd)); cmd->buffer = cmd->request_buffer; cmd->bufflen = cmd->request_bufflen; - cmd->abort_reason = 0; return 1; } -- cgit v1.2.3 From b4edcbcafdecc80ef5356ff6452768b1b926ea76 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jun 2005 13:40:52 +0200 Subject: [SCSI] remove scsi_cmnd->owner never checked anywhere Signed-off-by: James Bottomley --- drivers/scsi/scsi.c | 5 ----- drivers/scsi/scsi_error.c | 18 +----------------- drivers/scsi/scsi_lib.c | 2 -- drivers/scsi/scsi_priv.h | 11 ----------- include/scsi/scsi_cmnd.h | 1 - 5 files changed, 1 insertion(+), 36 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 5add683804e5..b25e5e531eb9 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -260,7 +260,6 @@ struct scsi_cmnd *scsi_get_command(struct scsi_device *dev, int gfp_mask) memset(cmd, 0, sizeof(*cmd)); cmd->device = dev; cmd->state = SCSI_STATE_UNUSED; - cmd->owner = SCSI_OWNER_NOBODY; init_timer(&cmd->eh_timeout); INIT_LIST_HEAD(&cmd->list); spin_lock_irqsave(&dev->list_lock, flags); @@ -612,7 +611,6 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd) */ cmd->state = SCSI_STATE_QUEUED; - cmd->owner = SCSI_OWNER_LOWLEVEL; atomic_inc(&cmd->device->iorequest_cnt); @@ -683,7 +681,6 @@ void scsi_init_cmd_from_req(struct scsi_cmnd *cmd, struct scsi_request *sreq) { sreq->sr_command = cmd; - cmd->owner = SCSI_OWNER_MIDLEVEL; cmd->cmd_len = sreq->sr_cmd_len; cmd->use_sg = sreq->sr_use_sg; @@ -768,7 +765,6 @@ void __scsi_done(struct scsi_cmnd *cmd) */ cmd->serial_number = 0; cmd->state = SCSI_STATE_BHQUEUE; - cmd->owner = SCSI_OWNER_BH_HANDLER; atomic_inc(&cmd->device->iodone_cnt); if (cmd->result) @@ -889,7 +885,6 @@ void scsi_finish_command(struct scsi_cmnd *cmd) SCSI_LOG_MLCOMPLETE(4, printk("Notifying upper driver of completion " "for device %d %x\n", sdev->id, cmd->result)); - cmd->owner = SCSI_OWNER_HIGHLEVEL; cmd->state = SCSI_STATE_FINISHED; /* diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index af61f989896e..0df8615732c1 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -77,7 +77,6 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag) /* * FIXME: Can we stop setting owner and state. */ - scmd->owner = SCSI_OWNER_ERROR_HANDLER; scmd->state = SCSI_STATE_FAILED; list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q); set_bit(SHOST_RECOVERY, &shost->shost_state); @@ -451,7 +450,6 @@ static void scsi_eh_done(struct scsi_cmnd *scmd) */ if (del_timer(&scmd->eh_timeout)) { scmd->request->rq_status = RQ_SCSI_DONE; - scmd->owner = SCSI_OWNER_ERROR_HANDLER; SCSI_LOG_ERROR_RECOVERY(3, printk("%s scmd: %p result: %x\n", __FUNCTION__, scmd, scmd->result)); @@ -484,8 +482,6 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, int timeout) * we will use a queued command if possible, otherwise we will * emulate the queuing and calling of completion function ourselves. */ - scmd->owner = SCSI_OWNER_LOWLEVEL; - if (sdev->scsi_level <= SCSI_2) scmd->cmnd[1] = (scmd->cmnd[1] & 0x1f) | (sdev->lun << 5 & 0xe0); @@ -514,7 +510,6 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, int timeout) */ if (scsi_eh_eflags_chk(scmd, SCSI_EH_REC_TIMEOUT)) { scsi_eh_eflags_clr(scmd, SCSI_EH_REC_TIMEOUT); - scmd->owner = SCSI_OWNER_LOWLEVEL; /* * as far as the low level driver is @@ -530,8 +525,6 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, int timeout) shost->hostt->eh_abort_handler(scmd); scmd->request->rq_status = RQ_SCSI_DONE; - scmd->owner = SCSI_OWNER_ERROR_HANDLER; - rtn = FAILED; } @@ -742,9 +735,6 @@ static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd) */ if (scmd->serial_number == 0) return SUCCESS; - - scmd->owner = SCSI_OWNER_LOWLEVEL; - return scmd->device->host->hostt->eh_abort_handler(scmd); } @@ -862,10 +852,7 @@ static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd) if (!scmd->device->host->hostt->eh_device_reset_handler) return FAILED; - scmd->owner = SCSI_OWNER_LOWLEVEL; - rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd); - if (rtn == SUCCESS) { scmd->device->was_reset = 1; scmd->device->expecting_cc_ua = 1; @@ -1048,7 +1035,6 @@ static int scsi_try_bus_reset(struct scsi_cmnd *scmd) SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Bus RST\n", __FUNCTION__)); - scmd->owner = SCSI_OWNER_LOWLEVEL; if (!scmd->device->host->hostt->eh_bus_reset_handler) return FAILED; @@ -1077,7 +1063,6 @@ static int scsi_try_host_reset(struct scsi_cmnd *scmd) SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Host RST\n", __FUNCTION__)); - scmd->owner = SCSI_OWNER_LOWLEVEL; if (!scmd->device->host->hostt->eh_host_reset_handler) return FAILED; @@ -1819,8 +1804,7 @@ scsi_reset_provider(struct scsi_device *dev, int flag) memset(&scmd->eh_timeout, 0, sizeof(scmd->eh_timeout)); scmd->request->rq_status = RQ_SCSI_BUSY; scmd->state = SCSI_STATE_INITIALIZING; - scmd->owner = SCSI_OWNER_MIDLEVEL; - + memset(&scmd->cmnd, '\0', sizeof(scmd->cmnd)); scmd->scsi_done = scsi_reset_provider_done_command; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index b4f320854d66..912cea081119 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -149,7 +149,6 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) * Register the fact that we own the thing for now. */ cmd->state = SCSI_STATE_MLQUEUE; - cmd->owner = SCSI_OWNER_MIDLEVEL; /* * Decrement the counters, since these commands are no longer @@ -299,7 +298,6 @@ EXPORT_SYMBOL(scsi_wait_req); */ static int scsi_init_cmd_errh(struct scsi_cmnd *cmd) { - cmd->owner = SCSI_OWNER_MIDLEVEL; cmd->serial_number = 0; memset(cmd->sense_buffer, 0, sizeof cmd->sense_buffer); diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h index 96d4f745975c..e0f5b5d4582d 100644 --- a/drivers/scsi/scsi_priv.h +++ b/drivers/scsi/scsi_priv.h @@ -12,17 +12,6 @@ struct scsi_request; struct Scsi_Host; -/* - * These are the values that the owner field can take. - * They are used as an indication of who the command belongs to. - */ -#define SCSI_OWNER_HIGHLEVEL 0x100 -#define SCSI_OWNER_MIDLEVEL 0x101 -#define SCSI_OWNER_LOWLEVEL 0x102 -#define SCSI_OWNER_ERROR_HANDLER 0x103 -#define SCSI_OWNER_BH_HANDLER 0x104 -#define SCSI_OWNER_NOBODY 0x105 - /* * Magic values for certain scsi structs. Shouldn't ever be used. */ diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 5f8c907c32e8..0c149219caf9 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -32,7 +32,6 @@ struct scsi_cmnd { struct scsi_device *device; unsigned short state; - unsigned short owner; struct scsi_request *sc_request; struct list_head list; /* scsi_cmnd participates in queue lists */ -- cgit v1.2.3 From 8d115f845a0bd59cd263e791f739964f42b7b0e8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jun 2005 13:42:05 +0200 Subject: [SCSI] remove scsi_cmnd->state We never look at it except for the old megaraid driver that abuses it for sending internal commands. That usage can be fixed easily because those internal commands are single-threaded by a mutex and we can easily use a completion there. Signed-off-by: James Bottomley --- drivers/scsi/megaraid.c | 26 ++++---------------------- drivers/scsi/megaraid.h | 2 +- drivers/scsi/scsi.c | 7 ------- drivers/scsi/scsi_error.c | 7 ------- drivers/scsi/scsi_lib.c | 5 ----- include/scsi/scsi_cmnd.h | 1 - 6 files changed, 5 insertions(+), 43 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index 6ee88c59953e..6fe884a2d00d 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -4477,8 +4478,6 @@ mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc, scb->idx = CMDID_INT_CMDS; - scmd->state = 0; - /* * Get the lock only if the caller has not acquired it already */ @@ -4488,15 +4487,7 @@ mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc, if( ls == LOCK_INT ) spin_unlock_irqrestore(&adapter->lock, flags); - /* - * Wait till this command finishes. Do not use - * wait_event_interruptible(). It causes panic if CTRL-C is hit when - * dumping e.g., physical disk information through /proc interface. - */ -#if 0 - wait_event_interruptible(adapter->int_waitq, scmd->state); -#endif - wait_event(adapter->int_waitq, scmd->state); + wait_for_completion(&adapter->int_waitq); rval = scmd->result; mc->status = scmd->result; @@ -4530,16 +4521,7 @@ mega_internal_done(Scsi_Cmnd *scmd) adapter = (adapter_t *)scmd->device->host->hostdata; - scmd->state = 1; /* thread waiting for its command to complete */ - - /* - * See comment in mega_internal_command() routine for - * wait_event_interruptible() - */ -#if 0 - wake_up_interruptible(&adapter->int_waitq); -#endif - wake_up(&adapter->int_waitq); + complete(&adapter->int_waitq); } @@ -4861,7 +4843,7 @@ megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) } init_MUTEX(&adapter->int_mtx); - init_waitqueue_head(&adapter->int_waitq); + init_completion(&adapter->int_waitq); adapter->this_id = DEFAULT_INITIATOR_ID; adapter->host->this_id = DEFAULT_INITIATOR_ID; diff --git a/drivers/scsi/megaraid.h b/drivers/scsi/megaraid.h index e25c4de9edd9..4facf557cd19 100644 --- a/drivers/scsi/megaraid.h +++ b/drivers/scsi/megaraid.h @@ -891,7 +891,7 @@ typedef struct { Scsi_Cmnd int_scmd; struct semaphore int_mtx; /* To synchronize the internal commands */ - wait_queue_head_t int_waitq; /* wait queue for internal + struct completion int_waitq; /* wait queue for internal cmds */ int has_cluster; /* cluster support on this HBA */ diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index b25e5e531eb9..1afe1e592af4 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -259,7 +259,6 @@ struct scsi_cmnd *scsi_get_command(struct scsi_device *dev, int gfp_mask) memset(cmd, 0, sizeof(*cmd)); cmd->device = dev; - cmd->state = SCSI_STATE_UNUSED; init_timer(&cmd->eh_timeout); INIT_LIST_HEAD(&cmd->list); spin_lock_irqsave(&dev->list_lock, flags); @@ -609,9 +608,6 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd) * We will use a queued command if possible, otherwise we will * emulate the queuing and calling of completion function ourselves. */ - - cmd->state = SCSI_STATE_QUEUED; - atomic_inc(&cmd->device->iorequest_cnt); /* @@ -764,7 +760,6 @@ void __scsi_done(struct scsi_cmnd *cmd) * Set the serial numbers back to zero */ cmd->serial_number = 0; - cmd->state = SCSI_STATE_BHQUEUE; atomic_inc(&cmd->device->iodone_cnt); if (cmd->result) @@ -885,8 +880,6 @@ void scsi_finish_command(struct scsi_cmnd *cmd) SCSI_LOG_MLCOMPLETE(4, printk("Notifying upper driver of completion " "for device %d %x\n", sdev->id, cmd->result)); - cmd->state = SCSI_STATE_FINISHED; - /* * We can get here with use_sg=0, causing a panic in the upper level */ diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 0df8615732c1..4f312da021f1 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -74,10 +74,6 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag) spin_lock_irqsave(shost->host_lock, flags); scsi_eh_eflags_set(scmd, eh_flag); - /* - * FIXME: Can we stop setting owner and state. - */ - scmd->state = SCSI_STATE_FAILED; list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q); set_bit(SHOST_RECOVERY, &shost->shost_state); shost->host_failed++; @@ -634,8 +630,6 @@ static void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, struct list_head *done_q) { scmd->device->host->host_failed--; - scmd->state = SCSI_STATE_BHQUEUE; - scsi_eh_eflags_clr_all(scmd); /* @@ -1803,7 +1797,6 @@ scsi_reset_provider(struct scsi_device *dev, int flag) scmd->request = &req; memset(&scmd->eh_timeout, 0, sizeof(scmd->eh_timeout)); scmd->request->rq_status = RQ_SCSI_BUSY; - scmd->state = SCSI_STATE_INITIALIZING; memset(&scmd->cmnd, '\0', sizeof(scmd->cmnd)); diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 912cea081119..58dcb0534a26 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -145,11 +145,6 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) else if (reason == SCSI_MLQUEUE_DEVICE_BUSY) device->device_blocked = device->max_device_blocked; - /* - * Register the fact that we own the thing for now. - */ - cmd->state = SCSI_STATE_MLQUEUE; - /* * Decrement the counters, since these commands are no longer * active on the host/device. diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 0c149219caf9..9957f16dcc5d 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -31,7 +31,6 @@ struct scsi_cmnd { int sc_magic; struct scsi_device *device; - unsigned short state; struct scsi_request *sc_request; struct list_head list; /* scsi_cmnd participates in queue lists */ -- cgit v1.2.3 From 0f34e3f53378a11c9ecba0f8165da50e8b01d53f Mon Sep 17 00:00:00 2001 From: "Chen, Kenneth W" Date: Tue, 12 Jul 2005 17:06:14 -0700 Subject: [SCSI] Redundant memset in scsi_alloc_sgtable scsi_init_io calls scsi_alloc_sgtable and then calls blk_rq_map_sg to initialize the scatterlist structure. blk_rq_map_sg() already memset the structure for every new segment. That makes the memset in scsi_alloc_sgtable unnecessary. Patch to delete the extra memset in scsi_alloc_sgtable. Tested on a x86_64 machine. Looks stable to me. Signed-off-by: Ken Chen Signed-off-by: James Bottomley --- drivers/scsi/scsi_lib.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 58dcb0534a26..cab535809d0d 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -614,8 +614,6 @@ static struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, int gfp_mas sgp = scsi_sg_pools + cmd->sglist_len; sgl = mempool_alloc(sgp->pool, gfp_mask); - if (sgl) - memset(sgl, 0, sgp->size); return sgl; } -- cgit v1.2.3