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| 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/scsi/scsi_lib.c | |
| 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/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index f1df41168391..2dcd9078de48 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1890,6 +1890,7 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *req, scsi_init_cmd_errh(cmd); cmd->scsi_done = scsi_mq_done; + blk_mq_start_request(req); reason = scsi_dispatch_cmd(cmd); if (reason) { scsi_set_blocked(cmd, reason); |