iop_status_get
if ((rv = iop_status_get(iop, 0)) == 0)
if (iop_status_get(sc, 1) != 0)
if (iop_status_get(sc, 0) != 0)
if ((rv = iop_status_get(sc, 0)) == 0)
if ((rv = iop_status_get(sc, 1)) != 0) {
if (iop_status_get(iop, 1) != 0) {
int iop_status_get(struct iop_softc *, int);