From e51279dcf036bfde3a95a020132050c771a79f1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20Dre=C3=9Fler?= <verdre@v0yd.nl>
Date: Wed, 22 Jan 2020 15:59:29 +0100
Subject: [PATCH] display: Only send one ping to a window at a time

If a window already is being pinged, it doesn't make sense to send more
pings to the window, instead we should just wait for that answer or
timeout until we send a new one.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/891
---
 src/core/display.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/core/display.c b/src/core/display.c
index eb0377ad3..f4d4c2090 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -2081,6 +2081,14 @@ meta_display_ping_window (MetaWindow *window,
     {
       MetaPingData *ping_data = l->data;
 
+      if (window == ping_data->window)
+        {
+          meta_topic (META_DEBUG_PING,
+                      "Window %s already is being pinged with serial %u\n",
+                      window->desc, ping_data->serial);
+          return;
+        }
+
       if (serial == ping_data->serial)
         {
           meta_warning ("Ping serial %u was reused for window %s, "