diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-09-14 03:40:09 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-09-22 22:00:07 +0400 |
| commit | e2490073cd7c3d6f6ef6e029a208edd4d38efac4 (patch) | |
| tree | 48465e67b335f6d696d698641365b4a4d1e89d32 /drivers/block/mtip32xx | |
| parent | bf57229745f849e500ba69ff91e35bc8160a7373 (diff) | |
| download | linux-e2490073cd7c3d6f6ef6e029a208edd4d38efac4.tar.xz | |
blk-mq: call blk_mq_start_request from ->queue_rq
When we call blk_mq_start_request from the core blk-mq code before calling into
->queue_rq there is a racy window where the timeout handler can hit before we've
fully set up the driver specific part of the command.
Move the call to blk_mq_start_request into the driver so the driver can start
the request only once it is fully set up.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/mtip32xx')
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 0e2084f37c67..4042440a0470 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -3783,6 +3783,8 @@ static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *rq, if (unlikely(mtip_check_unal_depth(hctx, rq))) return BLK_MQ_RQ_QUEUE_BUSY; + blk_mq_start_request(rq); + ret = mtip_submit_request(hctx, rq); if (likely(!ret)) return BLK_MQ_RQ_QUEUE_OK; |