linux-kernel - [PATCH 3/6] net: stmmac: fix missing unlock on error in stmmac

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Message-Id: <20211119025359.30815-4-Meng.Li@windriver.com>
Date:   Fri, 19 Nov 2021 10:53:56 +0800
From:   Meng Li <Meng.Li@...driver.com>
To:     stable@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        mcoquelin.stm32@...il.com, linux@...linux.org.uk, andrew@...n.ch,
        qiangqing.zhang@....com
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        meng.li@...driver.com
Subject: [PATCH 3/6] net: stmmac: fix missing unlock on error in stmmac_suspend()

From: Yang Yingliang <yangyingliang@...wei.com>

commit 30f347ae7cc1178c431f968a89d4b4a375bc0d39 upstream

Add the missing unlock before return from stmmac_suspend()
in the error handling case.

Fixes: 5ec55823438e ("net: stmmac: add clocks management for gmac driver")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Meng Li <Meng.Li@...driver.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 498962c4b59e..51626edc6a4c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5275,8 +5275,10 @@ int stmmac_suspend(struct device *dev)
 		/* Disable clock in case of PWM is off */
 		clk_disable_unprepare(priv->plat->clk_ptp_ref);
 		ret = pm_runtime_force_suspend(dev);
-		if (ret)
+		if (ret) {
+			mutex_unlock(&priv->lock);
 			return ret;
+		}
 	}
 	mutex_unlock(&priv->lock);
 
-- 
2.17.1