linux-kernel - [PATCH] net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared

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Message-Id: <1550265654-6626-1-git-send-email-khoroshilov@ispras.ru>
Date:   Sat, 16 Feb 2019 00:20:54 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared_probe()

If mv643xx_eth_shared_of_probe() fails, mv643xx_eth_shared_probe()
leaves clk undisabled.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/net/ethernet/marvell/mv643xx_eth.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 2f427271a793..292a668ce88e 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -2879,7 +2879,7 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 
 	ret = mv643xx_eth_shared_of_probe(pdev);
 	if (ret)
-		return ret;
+		goto err_put_clk;
 	pd = dev_get_platdata(&pdev->dev);
 
 	msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
@@ -2887,6 +2887,11 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 	infer_hw_params(msp);
 
 	return 0;
+
+err_put_clk:
+	if (!IS_ERR(msp->clk))
+		clk_disable_unprepare(msp->clk);
+	return ret;
 }
 
 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
-- 
2.7.4