HUBD_CHILD_EVENT_PRESUSPEND
hubd->h_child_events[port] |= HUBD_CHILD_EVENT_PRESUSPEND;
hubd->h_child_events[port] &= ~HUBD_CHILD_EVENT_PRESUSPEND;
if (hubd->h_child_events[port] & HUBD_CHILD_EVENT_PRESUSPEND) {
~HUBD_CHILD_EVENT_PRESUSPEND;
hubd->h_child_events[port] |= HUBD_CHILD_EVENT_PRESUSPEND;