bt_wait
bt_wait(sc, BT_C_B_BUSY, 0);
if (bt_wait(sc, BT_C_B_BUSY | BT_C_H2B_ATN, 0) < 0) {
if (bt_wait(sc, BT_C_B_BUSY | BT_C_H2B_ATN, 0) < 0) {
if (bt_wait(sc, BT_C_B2H_ATN, BT_C_B2H_ATN) < 0) {
static int bt_wait(struct ipmi_softc *, uint8_t, uint8_t);