SK_PORT_B
KKASSERT(sc_if->sk_port == SK_PORT_A || sc_if->sk_port == SK_PORT_B);
if (sc_if->sk_port == SK_PORT_B)
sc->sk_devs[SK_PORT_B] = device_add_child(dev, "sk", -1);
*port = SK_PORT_B;
device_set_ivars(sc->sk_devs[SK_PORT_B], port);
if (sc->sk_if[SK_PORT_B] != NULL)
sk_stop(sc->sk_if[SK_PORT_B]);
if (sc->sk_devs[SK_PORT_B] != NULL) {
port = device_get_ivars(sc->sk_devs[SK_PORT_B]);
device_set_ivars(sc->sk_devs[SK_PORT_B], NULL);
device_delete_child(dev, sc->sk_devs[SK_PORT_B]);
struct sk_if_softc *sc_if1 = sc->sk_if[SK_PORT_B];