scsi: make asynchronous aborts mandatory
There hasn't been any reports for HBAs where asynchronous abort
would not work, so we should make it mandatory and remove
the fallback.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index bbc4318..53e3343 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -162,7 +162,7 @@ scmd_eh_abort_handler(struct work_struct *work)
}
}
- scsi_eh_scmd_add(scmd, 0);
+ scsi_eh_scmd_add(scmd);
}
/**
@@ -221,9 +221,8 @@ static void scsi_eh_reset(struct scsi_cmnd *scmd)
/**
* scsi_eh_scmd_add - add scsi cmd to error handling.
* @scmd: scmd to run eh on.
- * @eh_flag: optional SCSI_EH flag.
*/
-void scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag)
+void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
{
struct Scsi_Host *shost = scmd->device->host;
unsigned long flags;
@@ -239,9 +238,6 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag)
if (shost->eh_deadline != -1 && !shost->last_reset)
shost->last_reset = jiffies;
- if (scmd->eh_eflags & SCSI_EH_ABORT_SCHEDULED)
- eh_flag &= ~SCSI_EH_CANCEL_CMD;
- scmd->eh_eflags |= eh_flag;
scsi_eh_reset(scmd);
list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);
shost->host_failed++;
@@ -275,10 +271,9 @@ enum blk_eh_timer_return scsi_times_out(struct request *req)
rtn = host->hostt->eh_timed_out(scmd);
if (rtn == BLK_EH_NOT_HANDLED) {
- if (host->hostt->no_async_abort ||
- scsi_abort_command(scmd) != SUCCESS) {
+ if (scsi_abort_command(scmd) != SUCCESS) {
set_host_byte(scmd, DID_TIME_OUT);
- scsi_eh_scmd_add(scmd, SCSI_EH_CANCEL_CMD);
+ scsi_eh_scmd_add(scmd);
}
}
@@ -331,7 +326,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,
list_for_each_entry(scmd, work_q, eh_entry) {
if (scmd->device == sdev) {
++total_failures;
- if (scmd->eh_eflags & SCSI_EH_CANCEL_CMD)
+ if (scmd->eh_eflags & SCSI_EH_ABORT_SCHEDULED)
++cmd_cancel;
else
++cmd_failed;
@@ -1154,8 +1149,7 @@ int scsi_eh_get_sense(struct list_head *work_q,
* should not get sense.
*/
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
- if ((scmd->eh_eflags & SCSI_EH_CANCEL_CMD) ||
- (scmd->eh_eflags & SCSI_EH_ABORT_SCHEDULED) ||
+ if ((scmd->eh_eflags & SCSI_EH_ABORT_SCHEDULED) ||
SCSI_SENSE_VALID(scmd))
continue;
@@ -1295,61 +1289,6 @@ static int scsi_eh_test_devices(struct list_head *cmd_list,
return list_empty(work_q);
}
-
-/**
- * scsi_eh_abort_cmds - abort pending commands.
- * @work_q: &list_head for pending commands.
- * @done_q: &list_head for processed commands.
- *
- * Decription:
- * Try and see whether or not it makes sense to try and abort the
- * running command. This only works out to be the case if we have one
- * command that has timed out. If the command simply failed, it makes
- * no sense to try and abort the command, since as far as the shost
- * adapter is concerned, it isn't running.
- */
-static int scsi_eh_abort_cmds(struct list_head *work_q,
- struct list_head *done_q)
-{
- struct scsi_cmnd *scmd, *next;
- LIST_HEAD(check_list);
- int rtn;
- struct Scsi_Host *shost;
-
- list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
- if (!(scmd->eh_eflags & SCSI_EH_CANCEL_CMD))
- continue;
- shost = scmd->device->host;
- if (scsi_host_eh_past_deadline(shost)) {
- list_splice_init(&check_list, work_q);
- SCSI_LOG_ERROR_RECOVERY(3,
- scmd_printk(KERN_INFO, scmd,
- "%s: skip aborting cmd, past eh deadline\n",
- current->comm));
- return list_empty(work_q);
- }
- SCSI_LOG_ERROR_RECOVERY(3,
- scmd_printk(KERN_INFO, scmd,
- "%s: aborting cmd\n", current->comm));
- rtn = scsi_try_to_abort_cmd(shost->hostt, scmd);
- if (rtn == FAILED) {
- SCSI_LOG_ERROR_RECOVERY(3,
- scmd_printk(KERN_INFO, scmd,
- "%s: aborting cmd failed\n",
- current->comm));
- list_splice_init(&check_list, work_q);
- return list_empty(work_q);
- }
- scmd->eh_eflags &= ~SCSI_EH_CANCEL_CMD;
- if (rtn == FAST_IO_FAIL)
- scsi_eh_finish_cmd(scmd, done_q);
- else
- list_move_tail(&scmd->eh_entry, &check_list);
- }
-
- return scsi_eh_test_devices(&check_list, work_q, done_q, 0);
-}
-
/**
* scsi_eh_try_stu - Send START_UNIT to device.
* @scmd: &scsi_cmnd to send START_UNIT
@@ -1692,11 +1631,6 @@ static void scsi_eh_offline_sdevs(struct list_head *work_q,
sdev_printk(KERN_INFO, scmd->device, "Device offlined - "
"not ready after error recovery\n");
scsi_device_set_state(scmd->device, SDEV_OFFLINE);
- if (scmd->eh_eflags & SCSI_EH_CANCEL_CMD) {
- /*
- * FIXME: Handle lost cmds.
- */
- }
scsi_eh_finish_cmd(scmd, done_q);
}
return;
@@ -2140,8 +2074,7 @@ static void scsi_unjam_host(struct Scsi_Host *shost)
SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));
if (!scsi_eh_get_sense(&eh_work_q, &eh_done_q))
- if (!scsi_eh_abort_cmds(&eh_work_q, &eh_done_q))
- scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);
+ scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);
spin_lock_irqsave(shost->host_lock, flags);
if (shost->eh_deadline != -1)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index ba8da90..9822fde 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1593,7 +1593,7 @@ static void scsi_softirq_done(struct request *rq)
scsi_queue_insert(cmd, SCSI_MLQUEUE_DEVICE_BUSY);
break;
default:
- scsi_eh_scmd_add(cmd, 0);
+ scsi_eh_scmd_add(cmd);
break;
}
}
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 5be6cbf6..e20ab10 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -18,7 +18,6 @@ struct scsi_nl_hdr;
/*
* Scsi Error Handler Flags
*/
-#define SCSI_EH_CANCEL_CMD 0x0001 /* Cancel this cmd */
#define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */
#define SCSI_SENSE_VALID(scmd) \
@@ -72,7 +71,7 @@ extern enum blk_eh_timer_return scsi_times_out(struct request *req);
extern int scsi_error_handler(void *host);
extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
extern void scsi_eh_wakeup(struct Scsi_Host *shost);
-extern void scsi_eh_scmd_add(struct scsi_cmnd *, int);
+extern void scsi_eh_scmd_add(struct scsi_cmnd *);
void scsi_eh_ready_devs(struct Scsi_Host *shost,
struct list_head *work_q,
struct list_head *done_q);