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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>
This commit is contained in:
Nikolay Aleksandrov 2012-09-14 05:50:03 +00:00 committed by David S. Miller
parent e488921f44
commit e4d1aa40e3
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
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@ -1378,6 +1378,10 @@ static void netxen_mask_aer_correctable(struct netxen_adapter *adapter)
struct pci_dev *root = pdev->bus->self;
u32 aer_pos;
/* root bus? */
if (!root)
return;
if (adapter->ahw.board_type != NETXEN_BRDTYPE_P3_4_GB_MM &&
adapter->ahw.board_type != NETXEN_BRDTYPE_P3_10G_TP)
return;