static int vmw_legacy_srf_unbind(struct vmw_resource *res,
				 bool readback,
				 struct ttm_validate_buffer *val_buf)
{
	if (unlikely(readback))
		return vmw_legacy_srf_dma(res, val_buf, false);
	return 0;
}
static int vmw_legacy_srf_unbind(struct vmw_resource *res,
				 bool readback,
				 struct ttm_validate_buffer *val_buf)
{
	if (unlikely(readback))
		return vmw_legacy_srf_dma(res, val_buf, false);
	return 0;
}