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scsi: scsi-mq: Wait for .queue_rq() if necessary

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Ensure that if scsi-mq is enabled that scsi_internal_device_block()
waits until ongoing shost->hostt->queuecommand() calls have finished.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James Bottomley <jejb@linux.vnet.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Doug Ledford <dledford@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2016-11-22 16:17:50 -08:00 committed by Martin K. Petersen
parent d2a145252c
commit 7dbbf0fa1b
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/scsi_lib.c
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@ -2893,7 +2893,7 @@ scsi_internal_device_block(struct scsi_device *sdev)
* request queue.
*/
if (q->mq_ops) {
blk_mq_stop_hw_queues(q);
blk_mq_quiesce_queue(q);
} else {
spin_lock_irqsave(q->queue_lock, flags);
blk_stop_queue(q);