dm raid: remove WARN_ON() in raid10_md_layout_to_format()

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 2e10c2f13a34..b409015c6909 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -564,9 +564,10 @@ static const char *raid10_md_layout_to_format(int layout)
         if (__raid10_near_copies(layout) > 1)
                 return "near";
 
-        WARN_ON(__raid10_far_copies(layout) < 2);
+        if (__raid10_far_copies(layout) > 1)
+                return "far";
 
-        return "far";
+        return "unknown";
 }
 
 /* Return md raid10 algorithm for @name */