1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index da2223aa727f..487ecda90ad4 100644
--- a/drivers/md/dm-mpath.c
+++ b/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);