netdev - [PATCH] net: dsa: mv88e6xxx: initialize return variable on declaration

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Message-Id: <20211206113219.17640-1-amhamza.mgc@gmail.com>
Date:   Mon,  6 Dec 2021 16:32:19 +0500
From:   Ameer Hamza <amhamza.mgc@...il.com>
To:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        olteanv@...il.com, davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        amhamza.mgc@...il.com
Subject: [PATCH] net: dsa: mv88e6xxx: initialize return variable on declaration

Uninitialized err variable defined in mv88e6393x_serdes_power
function may cause undefined behaviour if it is called from
mv88e6xxx_serdes_power_down context.

Addresses-Coverity: 1494644 ("Uninitialized scalar variable")

Signed-off-by: Ameer Hamza <amhamza.mgc@...il.com>
---
 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