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-rw-r--r--block/elevator.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/block/elevator.c b/block/elevator.c
index ca86192..6f23753 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -100,6 +100,14 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
if (bio_integrity(bio) != blk_integrity_rq(rq))
return 0;
+ /*
+ * Don't merge if failfast settings don't match
+ */
+ if (bio_failfast_dev(bio) != blk_failfast_dev(rq) ||
+ bio_failfast_transport(bio) != blk_failfast_transport(rq) ||
+ bio_failfast_driver(bio) != blk_failfast_driver(rq))
+ return 0;
+
if (!elv_iosched_allow_merge(rq, bio))
return 0;