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[SCSI] isci: Immediately fail I/O to removed devices. 

In the case where an I/O fails to start in isci_request_execute,
only allow retries if the device is not already gone.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Jeff Skirvin 2011-10-27 15:04:56 -07:00 committed by James Bottomley
parent 0e2e27990e
commit c2cb8a5fd7
1 changed files with 21 additions and 10 deletions
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31
drivers/scsi/isci/task.c
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@ -212,16 +212,27 @@ int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&task->task_state_lock, flags);
/* Indicate QUEUE_FULL so that the scsi
* midlayer retries. if the request
* failed for remote device reasons,
* it gets returned as
* SAS_TASK_UNDELIVERED next time
* through.
*/
isci_task_refuse(ihost, task,
SAS_TASK_COMPLETE,
SAS_QUEUE_FULL);
if (test_bit(IDEV_GONE, &idev->flags)) {
/* Indicate that the device
* is gone.
*/
isci_task_refuse(ihost, task,
SAS_TASK_UNDELIVERED,
SAS_DEVICE_UNKNOWN);
} else {
/* Indicate QUEUE_FULL so that
* the scsi midlayer retries.
* If the request failed for
* remote device reasons, it
* gets returned as
* SAS_TASK_UNDELIVERED next
* time through.
*/
isci_task_refuse(ihost, task,
SAS_TASK_COMPLETE,
SAS_QUEUE_FULL);
}
}
}
}