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blk-mq: simplify blk_mq_make_request()

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Move the blk_mq_bio_to_request() call in front of the if-statement.

Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2019-07-01 08:47:30 -07:00 • committed by Jens Axboe
parent c05f42206f
commit 970d168de6
1 changed files with 2 additions and 8 deletions
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10
block/blk-mq.c
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@ -1971,10 +1971,10 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
cookie = request_to_qc_t(data.hctx, rq);
blk_mq_bio_to_request(rq, bio, nr_segs);
plug = current->plug;
if (unlikely(is_flush_fua)) {
blk_mq_bio_to_request(rq, bio, nr_segs);
/* bypass scheduler for flush rq */
blk_insert_flush(rq);
blk_mq_run_hw_queue(data.hctx, true);
@ -1986,8 +1986,6 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
unsigned int request_count = plug->rq_count;
struct request *last = NULL;
blk_mq_bio_to_request(rq, bio, nr_segs);
if (!request_count)
trace_block_plug(q);
else
@ -2001,8 +1999,6 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
blk_add_rq_to_plug(plug, rq);
} else if (plug && !blk_queue_nomerges(q)) {
blk_mq_bio_to_request(rq, bio, nr_segs);
/*
* We do limited plugging. If the bio can be merged, do that.
* Otherwise the existing request in the plug list will be
@ -2027,10 +2023,8 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
}
} else if ((q->nr_hw_queues > 1 && is_sync) || (!q->elevator &&
!data.hctx->dispatch_busy)) {
blk_mq_bio_to_request(rq, bio, nr_segs);
blk_mq_try_issue_directly(data.hctx, rq, &cookie);
} else {
blk_mq_bio_to_request(rq, bio, nr_segs);
blk_mq_sched_insert_request(rq, false, true, true);
}