Commit ed7d78b2 authored Oct 12, 2015 by Thomas Hellstrom

drm/vmwgfx: Fix kernel NULL pointer dereference on older hardware



The commit "drm/vmwgfx: Fix up user_dmabuf refcounting", while fixing a
kernel crash introduced a NULL pointer dereference on older hardware.
Fix this.

Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

parent 575f9c86

drivers/gpu/drm/vmwgfx/vmwgfx_surface.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -657,6 +657,7 @@ static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
		struct vmw_resource *res = &user_srf->srf.res;

		*p_base = NULL;
		if (user_srf->backup_base)
		ttm_base_object_unref(&user_srf->backup_base);
		vmw_resource_unreference(&res);
		}