[PATCH 4/6 v2] blk-mq: avoid re-initialize request which is failed in direct dispatch

From: Shaohua Li
Date: Fri May 08 2015 - 13:51:42 EST

If we directly issue a request and it fails, we use
blk_mq_merge_queue_io(). But we already assigned bio to a request in
blk_mq_bio_to_request. blk_mq_merge_queue_io shouldn't run
blk_mq_bio_to_request again.

Signed-off-by: Shaohua Li <shli@xxxxxx>
block/blk-mq.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index a65acff..f13d0de 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1284,6 +1284,8 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
blk_mq_end_request(rq, rq->errors);
goto done;
+ blk_mq_insert_request(rq, false, true, true);
+ return;


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