rbd: fix return is missing in NotifyMessage::get_notify_op

Signed-off-by: Yao Zongyou <yaozongyou@vip.qq.com>

diff --git a/src/librbd/WatchNotifyTypes.cc b/src/librbd/WatchNotifyTypes.cc
index a91e459f4cce1f704e17f27fe78d07415062893d..f4f80fcbc9c26ae1978150247a8c50cf3b8f15b2 100644 (file)
--- a/src/librbd/WatchNotifyTypes.cc
+++ b/src/librbd/WatchNotifyTypes.cc
@@ -382,7 +382,7 @@ void NotifyMessage::dump(Formatter *f) const {
 }
 
 NotifyOp NotifyMessage::get_notify_op() const {
-  apply_visitor(GetNotifyOpVisitor(), payload);
+  return apply_visitor(GetNotifyOpVisitor(), payload);
 }
 
 void NotifyMessage::generate_test_instances(std::list<NotifyMessage *> &o) {