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scsi: allow passing in null rq to scsi_prep_state_check()

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In the following patch, we will implement scsi_get_budget()
which need to call scsi_prep_state_check() when rq isn't
dequeued yet.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei
2017-10-14 17:22:31 +08:00
committed by Jens Axboe
parent b347689ffb
commit aeec77629a
1 changed files with 2 additions and 2 deletions
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drivers/scsi/scsi_lib.c
+2 -2
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@@ -1301,7 +1301,7 @@ scsi_prep_state_check(struct scsi_device *sdev, struct request *req)
/*
* If the devices is blocked we defer normal commands.
*/
if (!(req->rq_flags & RQF_PREEMPT))
if (req && !(req->rq_flags & RQF_PREEMPT))
ret = BLKPREP_DEFER;
break;
default:
@@ -1310,7 +1310,7 @@ scsi_prep_state_check(struct scsi_device *sdev, struct request *req)
* special commands. In particular any user initiated
* command is not allowed.
*/
if (!(req->rq_flags & RQF_PREEMPT))
if (req && !(req->rq_flags & RQF_PREEMPT))
ret = BLKPREP_KILL;
break;
}