netdev - [PATCH] net: dsa: mv88e6xxx: fix uninit-value err in mv88e6393x_serdes

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Message-Id: <20211206101352.2713117-1-liu.yun@linux.dev>
Date:   Mon,  6 Dec 2021 18:13:52 +0800
From:   Jackie Liu <liu.yun@...ux.dev>
To:     kabel@...nel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org, liu.yun@...ux.dev
Subject: [PATCH] net: dsa: mv88e6xxx: fix uninit-value err in mv88e6393x_serdes_power

From: Jackie Liu <liuyun01@...inos.cn>

'err' is not initialized. If the value of cmode is not in the switch case,
it will cause a logic error and return early.

Fixes: 7527d66260ac ("net: dsa: mv88e6xxx: Save power by disabling SerDes trasmitter and receiver")
Reported-by: kernel-bot <kernel-robot@...inos.cn>
Signed-off-by: Jackie Liu <liuyun01@...inos.cn>
---
 drivers/net/dsa/mv88e6xxx/serdes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index 55273013bfb5..33727439724a 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -1507,7 +1507,7 @@ int mv88e6393x_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
 			    bool on)
 {
 	u8 cmode = chip->ports[port].cmode;
-	int err;
+	int err = 0;
 
 	if (port != 0 && port != 9 && port != 10)
 		return -EOPNOTSUPP;
-- 
2.25.1