IEEE80211_ACK_LEN
series[i].dur = athn_txtime(sc, IEEE80211_ACK_LEN,
dur += athn_txtime(sc, IEEE80211_ACK_LEN,
dur += athn_txtime(sc, IEEE80211_ACK_LEN,
series[i].dur = athn_txtime(sc, IEEE80211_ACK_LEN,
dur += athn_txtime(sc, IEEE80211_ACK_LEN,
dur += athn_txtime(sc, IEEE80211_ACK_LEN,
if (len < IEEE80211_ACK_LEN) {