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| author | Ming Lei <tom.leiming@gmail.com> | 2016-11-11 13:05:36 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-11-21 15:51:57 +0100 |
| commit | 4f9c74c6043891d415730bcb153c579be35c352f (patch) | |
| tree | ede04ea1835185c5e4b72ef58cb7477b2432e49a /drivers/md | |
| parent | dm rq: fix a race condition in rq_completed() (diff) | |
| download | linux-4f9c74c6043891d415730bcb153c579be35c352f.tar.xz linux-4f9c74c6043891d415730bcb153c579be35c352f.zip | |
dm rq: replace 'bio->bi_vcnt == 1' with !bio_multiple_segments
Avoid accessing .bi_vcnt directly, because the bio can be split from
block layer and .bi_vcnt should never have been used here.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-rq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 31a89c8832c0..54b081588b55 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -825,7 +825,7 @@ static void dm_old_request_fn(struct request_queue *q) pos = blk_rq_pos(rq); if ((dm_old_request_peeked_before_merge_deadline(md) && - md_in_flight(md) && rq->bio && rq->bio->bi_vcnt == 1 && + md_in_flight(md) && rq->bio && !bio_multiple_segments(rq->bio) && md->last_rq_pos == pos && md->last_rq_rw == rq_data_dir(rq)) || (ti->type->busy && ti->type->busy(ti))) { blk_delay_queue(q, 10); |