hci_init
.pr_init = hci_init,
kcondvar_t hci_init; /* sleep on this */
void hci_init(void);
cv_broadcast(&unit->hci_init);
cv_broadcast(&unit->hci_init);
cv_broadcast(&unit->hci_init);
cv_broadcast(&unit->hci_init);
cv_broadcast(&unit->hci_init);
cv_broadcast(&unit->hci_init);
cv_init(&unit->hci_init, "hci_init");
cv_destroy(&unit->hci_init);
err = cv_timedwait_sig(&unit->hci_init, bt_lock, 5 * hz);