Function bus_generic_detach

freebsd/kern/subr_bus.c:3747–3766

* @brief Helper function for implementing DEVICE_DETACH() * * This function can be used to help implement the DEVICE_DETACH() for * a bus. It calls device_detach() for each of the device's * children. */

 * children.
 */
int
bus_generic_detach(device_t dev)
{
	device_t child;
	int error;

	if (dev->state != DS_ATTACHED)
		return (EBUSY);

	/*
	 * Detach children in the reverse order.
	 * See bus_generic_suspend for details.
	 */
	TAILQ_FOREACH_REVERSE(child, &dev->children, device_list, link) {
		if ((error = device_detach(child)) != 0)
			return (error);
	}

	return (0);
}

/**
 * @brief Helper function for implementing DEVICE_SHUTDOWN()