diff options
| -rw-r--r-- | block/blk-mq.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index ca33cb755c5f..fc4520e992b1 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2731,7 +2731,7 @@ queue_exit: } static inline struct request *blk_mq_get_cached_request(struct request_queue *q, - struct blk_plug *plug, struct bio *bio, unsigned int nsegs) + struct blk_plug *plug, struct bio **bio, unsigned int nsegs) { struct request *rq; @@ -2741,19 +2741,21 @@ static inline struct request *blk_mq_get_cached_request(struct request_queue *q, if (!rq || rq->q != q) return NULL; - if (unlikely(!submit_bio_checks(bio))) + if (unlikely(!submit_bio_checks(*bio))) return NULL; - if (blk_mq_attempt_bio_merge(q, bio, nsegs)) + if (blk_mq_attempt_bio_merge(q, *bio, nsegs)) { + *bio = NULL; return NULL; - if (blk_mq_get_hctx_type(bio->bi_opf) != rq->mq_hctx->type) + } + if (blk_mq_get_hctx_type((*bio)->bi_opf) != rq->mq_hctx->type) return NULL; - if (op_is_flush(rq->cmd_flags) != op_is_flush(bio->bi_opf)) + if (op_is_flush(rq->cmd_flags) != op_is_flush((*bio)->bi_opf)) return NULL; - rq->cmd_flags = bio->bi_opf; + rq->cmd_flags = (*bio)->bi_opf; plug->cached_rq = rq_list_next(rq); INIT_LIST_HEAD(&rq->queuelist); - rq_qos_throttle(q, bio); + rq_qos_throttle(q, *bio); return rq; } @@ -2789,8 +2791,10 @@ void blk_mq_submit_bio(struct bio *bio) if (!bio_integrity_prep(bio)) return; - rq = blk_mq_get_cached_request(q, plug, bio, nr_segs); + rq = blk_mq_get_cached_request(q, plug, &bio, nr_segs); if (!rq) { + if (!bio) + return; rq = blk_mq_get_new_requests(q, plug, bio, nr_segs); if (unlikely(!rq)) return; |