[Mesa-dev] [PATCH] egl/dri: Don't invoke dri2_dpy->flush if it's NULL.

[jfonseca at vmware.com]

From: José Fonseca <jfonseca at vmware.com>

I'd like to test Mesa OpenGL ES along side with NVIDIA libGL drivers. But
without this change, I get a NULL pointer dereference.
---
 src/egl/drivers/dri2/egl_dri2.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 351fbf4..01e6302 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -970,7 +970,8 @@ dri2_wait_client(_EGLDriver *drv, _EGLDisplay *disp, _EGLContext *ctx)
    /* FIXME: If EGL allows frontbuffer rendering for window surfaces,
     * we need to copy fake to real here.*/
 
-   (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+   if (dri2_dpy->flush != NULL)
+      (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 
    return EGL_TRUE;
 }
-- 
1.7.9.5