Grow: fix reshape from RAID5 to RAID1.

Commit 5da9ab9874cb5896023afae1462550d83a869831
       Grow_reshape re-factor
in mdadm-3.2 broke conversion from RAID5 and RAID1 - and we
never noticed.

This fixes it.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/Grow.c b/Grow.c
index 4de80299..205110cc 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1281,7 +1281,9 @@ char *analyse_change(struct mdinfo *info, struct reshape *re)
 				return "Cannot set raid_disk when "
 					"converting RAID5->RAID1";
 			re->level = 1;
-			break;
+			re->backup_blocks = 0;
+			info->new_chunk = 0;
+			return NULL;
 		default:
 			return "Impossible level change requested";
 		}