Since pci_get_domain_bus_and_slot() can return NULL for PCI_DEVFN(12, 4), add NULL check for adapter->ptp_pdev in pch_gbe_probe(). This change is similar to the fix implemented in commit 9af152dcf1a0 ("drm/gma500: Add NULL check for pci_gfx_root in mid_get_vbt_data()"). Signed-off-by: Chenyuan Yang --- drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index e5a6f59af0b6..10b8f1fea1a2 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -2515,6 +2515,11 @@ static int pch_gbe_probe(struct pci_dev *pdev, pci_get_domain_bus_and_slot(pci_domain_nr(adapter->pdev->bus), adapter->pdev->bus->number, PCI_DEVFN(12, 4)); + if (!adapter->ptp_pdev) { + dev_err(&pdev->dev, "PTP device not found\n"); + ret = -ENODEV; + goto err_free_netdev; + } netdev->netdev_ops = &pch_gbe_netdev_ops; netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD; -- 2.34.1