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blk-mq: actually hook up defer list when running requests 

If ->queue_rq() returns BLK_MQ_RQ_QUEUE_OK, we use continue and skip
over the rest of the loop body. However, dptr is assigned later in the
loop body, and the BLK_MQ_RQ_QUEUE_OK case is exactly the case that we'd
want it for.

NVMe isn't actually using BLK_MQ_F_DEFER_ISSUE yet, nor is any other
in-tree driver, but if the code's going to be there, it might as well
work.

Fixes: 74c450521d ("blk-mq: add a 'list' parameter to ->queue_rq()")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
hifive-unleashed-5.1
Omar Sandoval 2016-06-08 18:22:20 -07:00 committed by Jens Axboe
parent ca93e45347
commit 52b9c330c6
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq.c
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@ -785,7 +785,7 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
switch (ret) {
case BLK_MQ_RQ_QUEUE_OK:
queued++;
continue;
break;
case BLK_MQ_RQ_QUEUE_BUSY:
list_add(&rq->queuelist, &rq_list);
__blk_mq_requeue_request(rq);