[PATCH mesa] egl/wayland: Dispatch the event queue before get_buffers

[Ander Conselvan de Oliveira]

When a client frame callback is executed and the client starts rendering
again, the egl event queue might not have been dispatched so that the
buffer release event for the previous frame hasn't been processed. In
that case a third buffer is allocated, even though it would be possible
to reuse the buffer that was just released.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
---
 src/egl/drivers/dri2/platform_wayland.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index 772116a..2708aab 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -401,6 +401,9 @@ dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
       dri2_egl_display(dri2_surf->base.Resource.Display);
    int i;
 
+   /* There might be a buffer release already queued that wasn't processed */
+   wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
+
    if (dri2_surf->base.Type == EGL_WINDOW_BIT &&
        (dri2_surf->base.Width != dri2_surf->wl_win->width || 
         dri2_surf->base.Height != dri2_surf->wl_win->height)) {
-- 
1.7.10.4