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-rw-r--r--block/elevator.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 902dd13..1f5bfe6 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -86,6 +86,12 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
if (rq->rq_disk != bio->bi_bdev->bd_disk || rq->special)
return 0;
+ /*
+ * only merge integrity protected bio into ditto rq
+ */
+ if (bio_integrity(bio) != blk_integrity_rq(rq))
+ return 0;
+
if (!elv_iosched_allow_merge(rq, bio))
return 0;