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Miller" , Jakub Kicinski , Matthias Brugger Cc: Arnd Bergmann , Ryder Lee , Nathan Chancellor , Nick Desaulniers , Sean Wang , Soul Huang , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH 2/2] mt76: mt7921: remove incorrect error handling Date: Thu, 25 Feb 2021 15:59:15 +0100 Message-Id: <20210225145953.404859-2-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210225145953.404859-1-arnd@kernel.org> References: <20210225145953.404859-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Arnd Bergmann Clang points out a mistake in the error handling in mt7921_mcu_tx_rate_report(), which tries to dereference a pointer that cannot be initialized because of the error that is being handled: drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:409:3: warning: variable 'stats' is uninitialized when used here [-Wuninitialized] stats->tx_rate = rate; ^~~~~ drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:401:32: note: initialize the variable 'stats' to silence this warning struct mt7921_sta_stats *stats; ^ Just remove the obviously incorrect line. Fixes: 1c099ab44727 ("mt76: mt7921: add MCU support") Signed-off-by: Arnd Bergmann --- drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) -- 2.29.2 Reviewed-by: Nick Desaulniers diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c index db125cd22b91..b5cc72e7e81c 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c @@ -405,10 +405,8 @@ mt7921_mcu_tx_rate_report(struct mt7921_dev *dev, struct sk_buff *skb, if (wlan_idx >= MT76_N_WCIDS) return; wcid = rcu_dereference(dev->mt76.wcid[wlan_idx]); - if (!wcid) { - stats->tx_rate = rate; + if (!wcid) return; - } msta = container_of(wcid, struct mt7921_sta, wcid); stats = &msta->stats;