[Qemu-devel] [PATCH] qxl: handle no updates in interface_update_area_complete

[Qemu-devel] [PATCH] qxl: handle no updates in interface_update_area_complete

[Gerd Hoffmann]

Simply return early in case there are no updated rects.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/qxl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 919dc5c..f867cdf 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -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;
     }
-- 
1.8.3.1