ceph: protect kick_requests() with mdsc->mutex

Signed-off-by: NYan, Zheng <zyan@redhat.com>
Reviewed-by: NSage Weil <sage@redhat.com>

fs/ceph/mds_client.c

@@ -2471,9 +2471,8 @@ static void handle_session(struct ceph_mds_session *session,
 		if (session->s_state == CEPH_MDS_SESSION_RECONNECTING)
 			pr_info("mds%d reconnect denied\n", session->s_mds);
 		remove_session_caps(session);
-		wake = 1; /* for good measure */
+		wake = 2; /* for good measure */
 		wake_up_all(&mdsc->session_close_wq);
-		kick_requests(mdsc, mds);
 		break;
 
 	case CEPH_SESSION_STALE:
@@ -2503,6 +2502,8 @@ static void handle_session(struct ceph_mds_session *session,
 	if (wake) {
 		mutex_lock(&mdsc->mutex);
 		__wake_requests(mdsc, &session->s_waiting);
+		if (wake == 2)
+			kick_requests(mdsc, mds);
 		mutex_unlock(&mdsc->mutex);
 	}
 	return;