librbd: TaskFinisher should finish all queued tasks

The destructor wasn't waiting for all Finisher tasks
to complete before stopping the thread.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
(cherry picked from commit 8e20240e4155e2f0398e79f4c0095d2d6ba1d4cb)

diff --git a/src/librbd/TaskFinisher.h b/src/librbd/TaskFinisher.h
index 14dcd3011fd0ca2ce3c9b3ea3428e11a60d2c401..4942a38bbdc2113f7772c1ee8763b825f8fc8810 100644 (file)
--- a/src/librbd/TaskFinisher.h
+++ b/src/librbd/TaskFinisher.h
@@ -35,6 +35,7 @@ public:
       delete m_safe_timer;
     }
 
+    m_finisher->wait_for_empty();
     m_finisher->stop();
     delete m_finisher;
   }