IEEE80211_CHAN_HT40D
else if (chan->ich_flags & IEEE80211_CHAN_HT40D)
else if (chan->ich_flags & IEEE80211_CHAN_HT40D)
addchan(c, extc->ic_freq, flags | IEEE80211_CHAN_HT40D,
(IEEE80211_CHAN_HT40U | IEEE80211_CHAN_HT40D)
IEEE80211_CHAN_HT40D);
htflags = IEEE80211_CHAN_HT40D;
((_c)->ich_flags & IEEE80211_CHAN_HT40D)
#define IEEE80211_CHAN_HT40 (IEEE80211_CHAN_HT40U | IEEE80211_CHAN_HT40D)