From: Wenbo Wang <wenbo.wang@xxxxxxxxxxxx>
This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 7ee8e4f3983c4ff700958a6099c8fd212ea67b94 ]
Use the right array index to reference the last
element of rq->biotail->bi_io_vec[]
Signed-off-by: Wenbo Wang <wenbo.wang@xxxxxxxxxxxx>
Reviewed-by: Chong Yuan <chong.yuan@xxxxxxxxxxxx>
Fixes: 66cb45aa41315 ("block: add support for limiting gaps in SG lists")
Cc: stable@xxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
block/blk-merge.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 89b97b5..2be75ff 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -609,7 +609,7 @@ 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;
}
--
2.1.0
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