static void __device_driver_unlock(struct device *dev, struct device *parent)
{
	device_unlock(dev);
	if (parent && dev->bus->need_parent_lock)
		device_unlock(parent);
}
static void __device_driver_unlock(struct device *dev, struct device *parent)
{
	device_unlock(dev);
	if (parent && dev->bus->need_parent_lock)
		device_unlock(parent);
}