[PATCH AUTOSEL 4.19 17/48] net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared_probe()

From: Sasha Levin
Date: Wed Mar 13 2019 - 15:13:43 EST


From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>

[ 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@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 62f204f32316..59007d6cd36d 100644
--- 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)
--
2.19.1