@retval EFI_SUCCESS The driver instance was successfully opened.\r
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,\r
RARP, etc.) is not finished yet.\r
@retval EFI_SUCCESS The driver instance was successfully opened.\r
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,\r
RARP, etc.) is not finished yet.\r