@@ -1394,18 +1394,15 @@ static int pxa168_eth_probe(struct platform_device *pdev)
printk(KERN_NOTICE "PXA168 10/100 Ethernet Driver\n");
- clk = devm_clk_get(&pdev->dev, NULL);
+ clk = devm_clk_get_enabled(&pdev->dev, NULL);
if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "Fast Ethernet failed to get clock\n");
+ dev_err(&pdev->dev, "Fast Ethernet failed to get and enable clock\n");
return -ENODEV;
}
- clk_prepare_enable(clk);
dev = alloc_etherdev(sizeof(struct pxa168_eth_private));
- if (!dev) {
- err = -ENOMEM;
- goto err_clk;
- }
+ if (!dev)
+ return -ENOMEM;
platform_set_drvdata(pdev, dev);
pep = netdev_priv(dev);
@@ -1523,8 +1520,6 @@ static int pxa168_eth_probe(struct platform_device *pdev)
mdiobus_free(pep->smi_bus);
err_netdev:
free_netdev(dev);
-err_clk:
- clk_disable_unprepare(clk);
return err;
}
@@ -1542,7 +1537,6 @@ static void pxa168_eth_remove(struct platform_device *pdev)
if (dev->phydev)
phy_disconnect(dev->phydev);
- clk_disable_unprepare(pep->clk);
mdiobus_unregister(pep->smi_bus);
mdiobus_free(pep->smi_bus);
unregister_netdev(dev);
If the clock pep->clk was not enabled in pxa168_eth_probe, it should not be disabled in any path. Conversely, if it was enabled in pxa168_eth_probe, it must be disabled in all error paths to ensure proper cleanup. Use the devm_clk_get_enabled helper function to ensure proper call balance for pep->clk. Found by Linux Verification Center (linuxtesting.org) with Klever. Fixes: a49f37eed22b ("net: add Fast Ethernet driver for PXA168.") Signed-off-by: Vitalii Mordan <mordan@ispras.ru> --- drivers/net/ethernet/marvell/pxa168_eth.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-)