IEEE80211_COM_REF_ADD
ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD);