linux-kernel - [PATCH v3 1/2] net: phy: fix yt8511 clang uninitialized variable warning

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Message-Id: <20210529110556.202531-2-pgwipeout@gmail.com>
Date:   Sat, 29 May 2021 07:05:55 -0400
From:   Peter Geis <pgwipeout@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Peter Geis <pgwipeout@...il.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH v3 1/2] net: phy: fix yt8511 clang uninitialized variable warning

clang doesn't preinitialize variables. If phy_select_page failed and
returned an error, phy_restore_page would be called with `ret` being
uninitialized.
Even though phy_restore_page won't use `ret` in this scenario,
initialize `ret` to silence the warning.

Fixes: 48e8c6f1612b ("net: phy: add driver for Motorcomm yt8511 phy")
Reported-by: kernel test robot <lkp@...el.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Peter Geis <pgwipeout@...il.com>
---
 drivers/net/phy/motorcomm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c
index 796b68f4b499..68cd19540c67 100644
--- a/drivers/net/phy/motorcomm.c
+++ b/drivers/net/phy/motorcomm.c
@@ -50,8 +50,8 @@ static int yt8511_write_page(struct phy_device *phydev, int page)
 
 static int yt8511_config_init(struct phy_device *phydev)
 {
+	int oldpage, ret = 0;
 	unsigned int ge, fe;
-	int ret, oldpage;
 
 	/* set clock mode to 125mhz */
 	oldpage = phy_select_page(phydev, YT8511_EXT_CLK_GATE);
-- 
2.25.1