net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared_probe()

[ Upstream commit e928b5d6b75e239feb9c6d5488974b6646a0ebc8 ]

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

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 62f204f..59007d6 100644 (file)
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -2886,7 +2886,7 @@ 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) ?
@@ -2894,6 +2894,11 @@ 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)