if (dev_class->format_device_name)
hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
else if (hw_class->format_interface_name)
if (dev_class->format_device_name)
hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
else if (hw_class->format_interface_name)