/* This function will register an usb class driver to the class driver manager. */
rt_err_t rt_usbh_class_driver_register(ucd_t drv)
/* This function will register an usb class driver to the class driver manager. */
rt_err_t rt_usbh_class_driver_register(ucd_t drv)
{
    if (drv == RT_NULL) return -RT_ERROR;
    rt_list_insert_after(&_driver_list, &(drv->list));
    return RT_EOK;
}