From: Marc-André Lureau <marcandre.lureau@redhat.com>
Date: Thu, 6 Apr 2017 12:05:12 +0000 (+0200)
Subject: console: add same displaychangelistener registration pre-condition
X-Git-Tag: v2.10.0-rc0~234^2~11
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e0665c3b5f57e0c1d20ec555c925fb84ccc31b29;p=thirdparty%2Fqemu.git

console: add same displaychangelistener registration pre-condition

Catch an invalid state. Mainly useful for documentation purposes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170406120513.638-3-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---

diff --git a/ui/console.c b/ui/console.c
index 0cbe5033dd6..189eecfd294 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1410,6 +1410,8 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
     static DisplaySurface *dummy;
     QemuConsole *con;
 
+    assert(!dcl->ds);
+
     if (dcl->ops->dpy_gl_ctx_create) {
         /* display has opengl support */
         assert(dcl->con);