1 files changed, 8 insertions, 0 deletions

diff --git a/block/elevator.c b/block/elevator.c
index ca861927ba41..6f2375339a99 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;