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Revert "scsi: core: run queue if SCSI device queue isn't ready and queue is idle"

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[ Upstream commit b4fd63f426 ]

This reverts commit 7e70aa789d.

Now that we have the patches ("blk-mq: In blk_mq_dispatch_rq_list()
"no budget" is a reason to kick") and ("blk-mq: Rerun dispatching in
the case of budget contention") we should no longer need the fix in
the SCSI code.  Revert it, resolving conflicts with other patches that
have touched this code.

With this revert (and the two new patches) I can run the script that
was in commit 7e70aa789d ("scsi: core: run queue if SCSI device
queue isn't ready and queue is idle") in a loop with no failure.  If I
do this revert without the two new patches I can easily get a failure.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: c31e76bcc3 ("blk-mq: remove stale comment for blk_mq_sched_mark_restart_hctx")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Douglas Anderson 2020-04-20 09:24:54 -07:00 committed by Greg Kroah-Hartman
parent 2d3c3aa412
commit 578c8f09c0
1 changed files with 1 additions and 6 deletions
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7
drivers/scsi/scsi_lib.c
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@ -1645,12 +1645,7 @@ static bool scsi_mq_get_budget(struct blk_mq_hw_ctx *hctx)
struct request_queue *q = hctx->queue;
struct scsi_device *sdev = q->queuedata;
if (scsi_dev_queue_ready(q, sdev))
return true;
if (atomic_read(&sdev->device_busy) == 0 && !scsi_device_blocked(sdev))
blk_mq_delay_run_hw_queue(hctx, SCSI_QUEUE_DELAY);
return false;
return scsi_dev_queue_ready(q, sdev);
}
static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,