diff options
| author | Vitalii Mordan <mordan@ispras.ru> | 2024-11-21 23:06:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 10:59:37 +0100 |
| commit | fa3be3e464fde3fd699344403edd662e103f37a7 (patch) | |
| tree | e73147c3bff23ee2505346e8d1f08be50a1898ef | |
| parent | 72fbd71c6c56cbbdfb3bdc085a83124de3b63b3e (diff) | |
marvell: pxa168_eth: fix call balance of pep->clk handling routines
[ Upstream commit b032ae57d4fe2b2445e3bc190db6fcaa8c102f68 ]
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>
Link: https://patch.msgid.link/20241121200658.2203871-1-mordan@ispras.ru
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/marvell/pxa168_eth.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c index 0d6a4e47e7a5..962d7046801c 100644 --- a/drivers/net/ethernet/marvell/pxa168_eth.c +++ b/drivers/net/ethernet/marvell/pxa168_eth.c @@ -1417,18 +1417,15 @@ 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); @@ -1541,8 +1538,6 @@ err_free_mdio: mdiobus_free(pep->smi_bus); err_netdev: free_netdev(dev); -err_clk: - clk_disable_unprepare(clk); return err; } |