/* This function will stop a usb class driver. */
rt_err_t rt_usb_class_driver_stop(ucd_t drv, void *args)
/* This function will stop a usb class driver. */
rt_err_t rt_usb_class_driver_stop(ucd_t drv, void *args)
{
    RT_ASSERT(drv != RT_NULL);
    if(drv->stop != RT_NULL)
        drv->stop(args);
    return RT_EOK;
}