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block: make sure FSEQ_DATA request has the same rq_disk as the original

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rq->rq_disk and bio->bi_bdev->bd_disk may differ if a request has
passed through remapping drivers.  FSEQ_DATA request incorrectly
followed bio->bi_bdev->bd_disk ending up being issued w/ mismatching
rq_disk.  Make it follow orig_rq->rq_disk.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Tested-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Tejun Heo 2010-09-03 11:56:17 +02:00 committed by Jens Axboe
parent 47f70d5a6c
commit 09d60c701b
1 changed files with 7 additions and 0 deletions
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7
block/blk-flush.c
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@ -111,6 +111,13 @@ static struct request *queue_next_fseq(struct request_queue *q)
break;
case QUEUE_FSEQ_DATA:
init_request_from_bio(rq, orig_rq->bio);
/*
* orig_rq->rq_disk may be different from
* bio->bi_bdev->bd_disk if orig_rq got here through
* remapping drivers. Make sure rq->rq_disk points
* to the same one as orig_rq.
*/
rq->rq_disk = orig_rq->rq_disk;
rq->cmd_flags &= ~(REQ_FLUSH | REQ_FUA);
rq->cmd_flags |= orig_rq->cmd_flags & (REQ_FLUSH | REQ_FUA);
rq->end_io = flush_data_end_io;