diff options
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 4268a894ad2..e1f83ee03c6 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -7973,7 +7973,7 @@ static const struct net_device_ops ixgbe_netdev_ops = { **/ static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter) { - struct pci_dev *entry; + struct pci_dev *entry, *pdev = adapter->pdev; int physfns = 0; /* Some cards can not use the generic count PCIe functions method, @@ -7985,8 +7985,20 @@ static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter) list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) { /* don't count virtual functions */ - if (!entry->is_virtfn) - physfns++; + if (entry->is_virtfn) + continue; + + /* When the devices on the bus don't all match our device ID, + * we can't reliably determine the correct number of + * functions. This can occur if a function has been direct + * attached to a virtual machine using VT-d, for example. In + * this case, simply return -1 to indicate this. + */ + if ((entry->vendor != pdev->vendor) || + (entry->device != pdev->device)) + return -1; + + physfns++; } return physfns; @@ -8381,7 +8393,10 @@ skip_sriov: expected_gts = ixgbe_enumerate_functions(adapter) * 10; break; } - ixgbe_check_minimum_link(adapter, expected_gts); + + /* don't check link if we failed to enumerate functions */ + if (expected_gts > 0) + ixgbe_check_minimum_link(adapter, expected_gts); err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str)); if (err) |