+struct ar9170_tx_null_frame {
+ struct ar9170_tx_hwdesc hdr;
+ struct ieee80211_hdr null;
+} __packed __aligned(4);
+
+struct carl9170_tx_null_superframe {
+ struct carl9170_tx_superdesc s;
+ struct ar9170_tx_null_frame f;
+} __packed __aligned(4);
+