When try to issue a request directly and we fail we will requeue the request, but call blk_mq_end_request() as well. This leads to the completed request being on a queuelist and getting ended twice, which causes list corruption in schedulers and other shenanigans.
Signed-off-by: Josef Bacik <[email protected]> --- block/blk-mq.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 08a49c6..c5a6985 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1457,8 +1457,6 @@ static void blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie, return; } - __blk_mq_requeue_request(rq); - if (ret == BLK_MQ_RQ_QUEUE_ERROR) { *cookie = BLK_QC_T_NONE; rq->errors = -EIO; @@ -1466,6 +1464,7 @@ static void blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie, return; } + __blk_mq_requeue_request(rq); insert: blk_mq_sched_insert_request(rq, false, true, false, may_sleep); } -- 2.7.4
