File 0267-ui-avoid-pointless-VNC-updates-if-f.patch of Package qemu.19799

From: "Daniel P. Berrange" <berrange@redhat.com>
Date: Mon, 18 Dec 2017 19:12:19 +0000
Subject: ui: avoid pointless VNC updates if framebuffer isn't dirty
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The vnc_update_client() method checks the 'has_dirty' flag to see if there are
dirty regions that are pending to send to the client. Regardless of this flag,
if a forced update is requested, updates must be sent. For unknown reasons
though, the code also tries to sent updates if audio capture is enabled. This
makes no sense as audio capture state does not impact framebuffer contents, so
this check is removed.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20171218191228.31018-5-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 3541b08475d51bddf8aded36576a0ff5a547a978)
[LY: BSC#1073489]
Signed-off-by: Liang Yan <lyan@suse.com>
---
 ui/vnc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/vnc.c b/ui/vnc.c
index ab58abe19ac9293573350b802c2f..810bed981d08bce7225895f62195 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -959,7 +959,7 @@ static int vnc_update_client(VncState *vs, int has_dirty)
         return 0;
     }
 
-    if (!vs->has_dirty && !vs->audio_cap && !vs->force_update) {
+    if (!vs->has_dirty && !vs->force_update) {
         return 0;
     }