FIX: Enable metadata updates for raid0

When raid0 is takeovered to degraded raid4, metadata updates has to be
applied via mdmon (raid4 has to be monitored).
It is not possible due to no update_tail pointer initialization
in supertype structure.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/Grow.c b/Grow.c
index ad5ccc45..c2c45aed 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1848,6 +1848,9 @@ static int reshape_array(char *container, int fd, char *devname,
 			if (!mdmon_running(st->container_dev))
 				start_mdmon(st->container_dev);
 			ping_monitor(container);
+			if (mdmon_running(st->container_dev) &&
+			    st->update_tail == NULL)
+				st->update_tail = &st->updates;
 		}
 	}
 	/* ->reshape_super might have chosen some spares from the
@@ -2265,6 +2268,8 @@ started:
 					": %s: could not set level "
 					"to %s\n", devname, c);
 		}
+		if (info->new_level == 0)
+			st->update_tail = NULL;
 	}
 out:
 	if (forked)