fs: dlm: let dlm_add_cb queue work after resume only

We should allow dlm_add_cb() to call queue_work() only after the
recovery queued pending for delayed lkbs. This patch will move the
switch LSFL_CB_DELAY after the delayed lkb work was processed.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/ast.c

@@ -308,8 +308,6 @@ void dlm_callback_resume(struct dlm_ls *ls)
 	if (!ls->ls_callback_wq)
 		return;
 
-	clear_bit(LSFL_CB_DELAY, &ls->ls_flags);
-
 more:
 	mutex_lock(&ls->ls_cb_mutex);
 	list_for_each_entry_safe(lkb, safe, &ls->ls_cb_delay, lkb_cb_list) {
@@ -320,6 +318,8 @@ void dlm_callback_resume(struct dlm_ls *ls)
 			break;
 	}
 	empty = list_empty(&ls->ls_cb_delay);
+	if (empty)
+		clear_bit(LSFL_CB_DELAY, &ls->ls_flags);
 	mutex_unlock(&ls->ls_cb_mutex);
 
 	sum += count;