GET_CUR
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_get, GET_CUR)
if (usbvc_vc_get_ctrl(usbvcp, GET_CUR, ctrl.entity_id,
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_curr, GET_CUR)