UGEN_EP_STATE_STAT_OPEN
if ((epp->ep_state & UGEN_EP_STATE_STAT_OPEN) == 0) {
epp->ep_state |= UGEN_EP_STATE_STAT_OPEN;
epp->ep_state &= ~(UGEN_EP_STATE_STAT_OPEN |
UGEN_EP_STATE_STAT_OPEN)