From b80a31f2d8debd7681d141b03ce167701549be4f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=8D=C3=B1igo=20Huguet?= Date: Fri, 21 Jan 2022 08:49:03 +0100 Subject: [PATCH 25/36] rtw89: don't kick off TX DMA if failed to write skb MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Bugzilla: http://bugzilla.redhat.com/2033291 commit a58fdb7c843a37d6598204c6513961feefdadc6a Author: Ping-Ke Shih Date: Wed Dec 1 17:38:16 2021 +0800 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 Signed-off-by: Íñigo Huguet --- drivers/net/wireless/realtek/rtw89/mac80211.c | 1 + 1 file changed, 1 insertion(+) 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); } -- 2.13.6