md: add missing sysfs_notify on array_state update

Changeset 6791875e2e53 has added early return from a function so there is no
sysfs notification for 'active' and 'clean' state change.

Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 29297e97cdea..f77cad854044 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3938,6 +3938,8 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
                         } else
                                 err = -EBUSY;
                 }
+                if (!err)
+                        sysfs_notify_dirent_safe(mddev->sysfs_state);
                 spin_unlock(&mddev->lock);
                 return err ?: len;
         }