isp_ridacq_t
isp_ridacq_t rid;
isp_get_ridacq(isp, (isp_ridacq_t *)hp, &rid);
isp_get_ridacq(ispsoftc_t *isp, isp_ridacq_t *src, isp_ridacq_t *dst)
void isp_get_ridacq(ispsoftc_t *, isp_ridacq_t *, isp_ridacq_t *);