Commit ff87bcec authored Jun 03, 2014 by Jens Axboe

blk-mq: handle NULL req return from blk_map_request in single queue mode



blk_mq_map_request() can return NULL if we fail entering the queue
(dying, or removed), in which case it has already ended IO on the
bio. So nothing more to do, except just return.

Signed-off-by: Jens Axboe <axboe@fb.com>

parent e6cdb092

block/blk-mq.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1276,6 +1276,8 @@ static void blk_sq_make_request(struct request_queue q, struct bio bio)
		return;

		rq = blk_mq_map_request(q, bio, &data);
		if (unlikely(!rq))
		return;

		if (unlikely(is_flush_fua)) {
		blk_mq_bio_to_request(rq, bio);