Commit 7ee8e4f3 authored by Wenbo Wang's avatar Wenbo Wang Committed by Jens Axboe

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: default avatarWenbo Wang <>
Reviewed-by: default avatarChong Yuan <>
Fixes: 66cb45aa ("block: add support for limiting gaps in SG lists")
Signed-off-by: default avatarJens Axboe <>
parent bc188d81
......@@ -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;
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