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netxen: check for root bus in netxen_mask_aer_correctable
Add a check if pdev->bus->self == NULL (root bus). When attaching a netxen NIC to a VM it can be on the root bus and the guest would crash in netxen_mask_aer_correctable() because of a NULL pointer dereference if CONFIG_PCIEAER is present. Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1378,6 +1378,10 @@ static void netxen_mask_aer_correctable(struct netxen_adapter *adapter)
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struct pci_dev *root = pdev->bus->self;
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u32 aer_pos;
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/* root bus? */
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if (!root)
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return;
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if (adapter->ahw.board_type != NETXEN_BRDTYPE_P3_4_GB_MM &&
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adapter->ahw.board_type != NETXEN_BRDTYPE_P3_10G_TP)
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return;
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