linux-kernel - [PATCH 5.10 07/21] net: stmmac: fix missing unlock on error in stmmac

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Date:   Fri, 19 Nov 2021 18:37:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Meng Li <Meng.Li@...driver.com>
Subject: [PATCH 5.10 07/21] 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- 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);