HW_OFF_LIMITS
const int off_limits = atomic_load_int(&sc->error_flags) & HW_OFF_LIMITS;
(ADAP_STOPPED | HW_OFF_LIMITS);
atomic_clear_int(&sc->error_flags, HW_OFF_LIMITS);
atomic_set_int(&sc->error_flags, HW_OFF_LIMITS);
MPASS(sc->error_flags & HW_OFF_LIMITS);