Mesa (13.0): egl/wayland: add missing destroy_window callback

[Emil Velikov]

Module: Mesa
Branch: 13.0
Commit: 19e8270fe0333e1087653c4c1a46ac5052f58670
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=19e8270fe0333e1087653c4c1a46ac5052f58670

Author: Stencel, Joanna <joanna.stencel at intel.com>
Date:   Mon Oct 24 09:48:11 2016 +0100

egl/wayland: add missing destroy_window callback

The original patch by Joanna added the function pointer and callback yet
things got only partially applied - the infra was added, but the
implementation was missing.

Cc: "12.0 13.0" <mesa-stable at lists.freedesktop.org>
Fixes: 690ead4a135 ("egl/wayland-egl: Fix for segfault in
dri2_wl_destroy_surface.")
Signed-off-by: Emil Velikov <emil.l.velikov at gmail.com>

(cherry picked from commit 2e0ab61e29c4b44d349ab433c899b691a9b12f68)

---

 src/egl/drivers/dri2/platform_wayland.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index ccab192..789e035 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -118,6 +118,13 @@ resize_callback(struct wl_egl_window *wl_win, void *data)
    (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 }
 
+static void
+destroy_window_callback(void *data)
+{
+   struct dri2_egl_surface *dri2_surf = data;
+   dri2_surf->wl_win = NULL;
+}
+
 /**
  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
  */
@@ -159,6 +166,7 @@ dri2_wl_create_surface(_EGLDriver *drv, _EGLDisplay *disp,
 
    dri2_surf->wl_win->private = dri2_surf;
    dri2_surf->wl_win->resize_callback = resize_callback;
+   dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 
    dri2_surf->base.Width =  -1;
    dri2_surf->base.Height = -1;
@@ -254,8 +262,11 @@ dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
    if (dri2_surf->throttle_callback)
       wl_callback_destroy(dri2_surf->throttle_callback);
 
-   dri2_surf->wl_win->private = NULL;
-   dri2_surf->wl_win->resize_callback = NULL;
+   if (dri2_surf->wl_win) {
+      dri2_surf->wl_win->private = NULL;
+      dri2_surf->wl_win->resize_callback = NULL;
+      dri2_surf->wl_win->destroy_window_callback = NULL;
+   }
 
    free(surf);