Hello Ping-Ke Shih, The patch e3ec7017f6a2: "rtw89: add Realtek 802.11ax driver" from Oct 11, 2021, leads to the following Smatch static checker warning: drivers/net/wireless/realtek/rtw89/mac80211.c:31 rtw89_ops_tx() error: uninitialized symbol 'qsel'. drivers/net/wireless/realtek/rtw89/mac80211.c 16 static void rtw89_ops_tx(struct ieee80211_hw *hw, 17 struct ieee80211_tx_control *control, 18 struct sk_buff *skb) 19 { 20 struct rtw89_dev *rtwdev = hw->priv; 21 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 22 struct ieee80211_vif *vif = info->control.vif; 23 struct ieee80211_sta *sta = control->sta; 24 int ret, qsel; 25 26 ret = rtw89_core_tx_write(rtwdev, vif, sta, skb, &qsel); 27 if (ret) { 28 rtw89_err(rtwdev, "failed to transmit skb: %d\n", ret); 29 ieee80211_free_txskb(hw, skb); Missing return; here? 30 } --> 31 rtw89_core_tx_kick_off(rtwdev, qsel); 32 } regards, dan carpenter