linux-kernel - [PATCH v2] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac

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Date:   Sat, 15 Jan 2022 09:49:18 -0800
From:   trix@...hat.com
To:     nbd@....name, john@...ozen.org, sean.wang@...iatek.com,
        Mark-MC.Lee@...iatek.com, davem@...emloft.net, kuba@...nel.org,
        matthias.bgg@...il.com, nathan@...nel.org, ndesaulniers@...gle.com,
        opensource@...rst.com
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Tom Rix <trix@...hat.com>
Subject: [PATCH v2] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac_config()

From: Tom Rix <trix@...hat.com>

Clang static analysis reports this problem
mtk_eth_soc.c:394:7: warning: Branch condition evaluates
  to a garbage value
                if (err)
                    ^~~

err is not initialized and only conditionally set.
So intitialize err.

Fixes: 7e538372694b ("net: ethernet: mediatek: Re-add support SGMII")
Signed-off-by: Tom Rix <trix@...hat.com>
---
v2: change to initializing

drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index b67b4323cff08..f02d07ec5ccbf 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -267,7 +267,7 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 					   phylink_config);
 	struct mtk_eth *eth = mac->hw;
 	u32 mcr_cur, mcr_new, sid, i;
-	int val, ge_mode, err;
+	int val, ge_mode, err = 0;
 
 	/* MT76x8 has no hardware settings between for the MAC */
 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) &&
-- 
2.26.3