UHIDEV_STOPPED
KASSERT(scd->sc_state & UHIDEV_STOPPED);
scd->sc_state & ~(UHIDEV_OPEN | UHIDEV_STOPPED));
if (scd->sc_state & UHIDEV_STOPPED) {
if (scd->sc_state & UHIDEV_STOPPED) {
atomic_store_relaxed(&scd->sc_state, scd->sc_state | UHIDEV_STOPPED);
KASSERT(scd->sc_state & UHIDEV_STOPPED);