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qxl: handle no updates in interface_update_area_complete 

Simply return early in case there are no updated rects.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1465395101-13580-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2016-06-08 16:11:41 +02:00
parent de1b9b85ef
commit 2f5ae772c6
1 changed files with 2 additions and 1 deletions
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3
hw/display/qxl.c
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@ -893,7 +893,8 @@ static void interface_update_area_complete(QXLInstance *sin,
int qxl_i;
qemu_mutex_lock(&qxl->ssd.lock);
if (surface_id != 0 || !qxl->render_update_cookie_num) {
if (surface_id != 0 || !num_updated_rects ||
!qxl->render_update_cookie_num) {
qemu_mutex_unlock(&qxl->ssd.lock);
return;
}