netdev - [PATCH net-next 2/8] net: phy: mscc: fix a possible double unlock

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Date:   Thu, 25 Jun 2020 17:42:05 +0200
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     davem@...emloft.net, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH net-next 2/8] net: phy: mscc: fix a possible double unlock

On vsc8584_ptp_init failure we jump to the 'err' label, which unlocks
the MDIO bus lock. But vsc8584_ptp_init isn't called with the MDIO bus
lock taken, which could result in a double unlock. Fix this.

Fixes: ab2bf9339357 ("net: phy: mscc: 1588 block initialization")
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
---
 drivers/net/phy/mscc/mscc_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index 2a7082983c09..cb4e15d6e2db 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1436,7 +1436,7 @@ static int vsc8584_config_init(struct phy_device *phydev)
 
 	ret = vsc8584_ptp_init(phydev);
 	if (ret)
-		goto err;
+		return ret;
 
 	phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
 
-- 
2.26.2