---

yaml
---
r: 209175
b: refs/heads/master
c: 959eb4e
h: refs/heads/master
i:
  209173: e282ccb
  209171: af4cd78
  209167: 8151a19
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7b76ec11fec40203836b488496d2df082d5b2022
+refs/heads/master: 959eb4e5592cc0b0b07db0ca30d2b1efd790020f

trunk/drivers/md/dm-mpath.c

@@ -893,6 +893,7 @@ static int multipath_ctr(struct dm_target *ti, unsigned int argc,
 	}
 
 	ti->num_flush_requests = 1;
+	ti->num_discard_requests = 1;
 
 	return 0;
 
@@ -1272,6 +1273,15 @@ static int do_end_io(struct multipath *m, struct request *clone,
 	if (error == -EOPNOTSUPP)
 		return error;
 
+	if (clone->cmd_flags & REQ_DISCARD)
+		/*
+		 * Pass all discard request failures up.
+		 * FIXME: only fail_path if the discard failed due to a
+		 * transport problem.  This requires precise understanding
+		 * of the underlying failure (e.g. the SCSI sense).
+		 */
+		return error;
+
 	if (mpio->pgpath)
 		fail_path(mpio->pgpath);