IEEE80211_STYPE_BACK_REQ
(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
IEEE80211_STYPE_BACK_REQ);