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| author | Wenbo Wang <wenbo.wang@memblaze.com> | 2015-03-20 01:04:54 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-03-20 08:50:41 -0600 |
| commit | 7ee8e4f3983c4ff700958a6099c8fd212ea67b94 (patch) | |
| tree | 26208113a37530a9918c72f20490c34f076b5983 | |
| parent | bc188d818edf325ae38cfa43254a0b10a4defd65 (diff) | |
| download | lwn-7ee8e4f3983c4ff700958a6099c8fd212ea67b94.tar.gz lwn-7ee8e4f3983c4ff700958a6099c8fd212ea67b94.zip | |
Fix bug in blk_rq_merge_ok
Use the right array index to reference the last
element of rq->biotail->bi_io_vec[]
Signed-off-by: Wenbo Wang <wenbo.wang@memblaze.com>
Reviewed-by: Chong Yuan <chong.yuan@memblaze.com>
Fixes: 66cb45aa41315 ("block: add support for limiting gaps in SG lists")
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-merge.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index fc1ff3b1ea1f..fd3fee81c23c 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -592,7 +592,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) if (q->queue_flags & (1 << QUEUE_FLAG_SG_GAPS)) { struct bio_vec *bprev; - bprev = &rq->biotail->bi_io_vec[bio->bi_vcnt - 1]; + bprev = &rq->biotail->bi_io_vec[rq->biotail->bi_vcnt - 1]; if (bvec_gap_to_prev(bprev, bio->bi_io_vec[0].bv_offset)) return false; } |