md: notify mdstat waiters of level change

Level modifications change the output of mdstat.  The mdmon manager
thread is interested in these events for external metadata management.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index af0780ae56b5..69f659e46aa6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3075,6 +3075,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
         set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
         md_wakeup_thread(mddev->thread);
         sysfs_notify(&mddev->kobj, NULL, "level");
+        md_new_event(mddev);
         return rv;
 }