+static void
+nv40_miptree_surface_del(struct pipe_screen *pscreen,
+ struct pipe_surface **psurface)
+{
+ struct pipe_surface *ps = *psurface;
+
+ *psurface = NULL;
+ if (--ps->refcount > 0)
+ return;
+
+ pipe_texture_reference(&ps->texture, NULL);
+ pipe_buffer_reference(pscreen->winsys, &ps->buffer, NULL);
+ FREE(ps);
+}
+