From 2e9bd583a4a7a1c0782de27a23ff433b8b7448e3 Mon Sep 17 00:00:00 2001
From: Jason Dillaman <dillaman@redhat.com>
Date: Fri, 17 Jan 2020 08:13:45 -0500
Subject: [PATCH] rbd-mirror: ensure mirror status updater cannot attempt empty
 op

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
---
 src/tools/rbd_mirror/MirrorStatusUpdater.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/tools/rbd_mirror/MirrorStatusUpdater.cc b/src/tools/rbd_mirror/MirrorStatusUpdater.cc
index 29dd095c6bdc..561741d1420c 100644
--- a/src/tools/rbd_mirror/MirrorStatusUpdater.cc
+++ b/src/tools/rbd_mirror/MirrorStatusUpdater.cc
@@ -293,6 +293,11 @@ void MirrorStatusUpdater<I>::update_task(int r) {
   Context* ctx = create_context_callback<
     MirrorStatusUpdater<I>,
     &MirrorStatusUpdater<I>::handle_update_task>(this);
+  if (updating_global_image_ids.empty()) {
+    ctx->complete(0);
+    return;
+  }
+
   auto gather = new C_Gather(g_ceph_context, ctx);
 
   auto it = updating_global_image_ids.begin();
-- 
2.47.3