From: Ping-Ke Shih Date: Wed, 1 Dec 2021 09:38:16 +0000 (+0800) Subject: rtw89: don't kick off TX DMA if failed to write skb X-Git-Tag: v5.17-rc1~170^2~165^2~25 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a58fdb7c843a37d6598204c6513961feefdadc6a;p=users%2Fhch%2Fmisc.git rtw89: don't kick off TX DMA if failed to write skb This is found by Smatch static checker warning: drivers/net/wireless/realtek/rtw89/mac80211.c:31 rtw89_ops_tx() error: uninitialized symbol 'qsel'. The warning is because 'qsel' isn't filled by rtw89_core_tx_write() due to failed to write. The way to fix it is to avoid kicking off TX DMA, so add 'return' to the failure case. Reported-by: Dan Carpenter Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211201093816.13806-1-pkshih@realtek.com --- diff --git a/drivers/net/wireless/realtek/rtw89/mac80211.c b/drivers/net/wireless/realtek/rtw89/mac80211.c index 757685de6b07..a322259f4cc4 100644 --- a/drivers/net/wireless/realtek/rtw89/mac80211.c +++ b/drivers/net/wireless/realtek/rtw89/mac80211.c @@ -27,6 +27,7 @@ static void rtw89_ops_tx(struct ieee80211_hw *hw, if (ret) { rtw89_err(rtwdev, "failed to transmit skb: %d\n", ret); ieee80211_free_txskb(hw, skb); + return; } rtw89_core_tx_kick_off(rtwdev, qsel); }