SG_FULL_RESID
scb->hscb->sgptr = aic_htole32(scb->sg_list_busaddr|SG_FULL_RESID);
&& ((ahd_inb_scbram(ahd, SCB_SGPTR) & SG_FULL_RESID) != 0
sgptr = ahd_inl_scbram(ahd, SCB_SGPTR) & ~SG_FULL_RESID;
if ((sgptr & SG_FULL_RESID) != 0) {
hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
if ((sgptr & SG_FULL_RESID) != 0) {
scb->hscb->sgptr = aic_htole32(scb->sg_list_phys|SG_FULL_RESID);