Use error handling instead of success handling. Less indented logic is easier to read. Cc: Zhichao Gao <zhichao.gao@intel.com> Cc: Ray Ni <ray.ni@intel.com> Signed-off-by: Daniel Nguyen <daniel.nguyen@arm.com> Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>