From a4f63634760acfcc349a5582c77ca4a004c813f6 Mon Sep 17 00:00:00 2001 From: Betty Dall Date: Thu, 19 Dec 2013 10:59:09 -0700 Subject: [PATCH] atl1c: Check return from pci_find_ext_capability() in atl1c_reset_pcie() The function atl1c_reset_pcie() does not check the return from pci_find_ext_cabability() where it is getting the postion of the PCI_EXT_CAP_ID_ERR. It is possible for the return to be 0. Signed-off-by: Betty Dall Signed-off-by: David S. Miller --- drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index a36a760ada28..29801750f239 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -145,9 +145,11 @@ static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) * Mask some pcie error bits */ pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); - pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); - data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); - pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); + if (pos) { + pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); + data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); + pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); + } /* clear error status */ pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, PCI_EXP_DEVSTA_NFED | -- 2.20.1