BTF_INIT
unit->hci_flags |= (btr->btr_flags & (BTF_INIT | BTF_MASTER));
unit->hci_flags |= BTF_INIT;
while (unit->hci_flags & BTF_INIT) {
btr.btr_flags |= BTF_INIT;
} while ((btr.btr_flags & BTF_INIT) != 0);