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authorJacob Pan <jacob.jun.pan@intel.com>2010-02-24 09:42:50 -0800
committerH. Peter Anvin <hpa@zytor.com>2010-02-24 11:01:34 -0800
commitc54113823c777f035fa7444f8841fbccda4a5cc0 (patch)
tree5c456596db5a56a8fcfd3e97cfdce8acb55ef9ff
parent9eeeb09edba1e3544526611663472743ca584d36 (diff)
x86, pci: Add sanity check for PCI fixed bar probing
While probing for the PCI fixed BAR capability in the extended PCI configuration space we need to make sure raw_pci_ext_ops is actually initialized. Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com> LKML-Reference: <43F901BD926A4E43B106BF17856F0755A321E8F7@orsmsx508.amr.corp.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
-rw-r--r--arch/x86/pci/mrst.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/pci/mrst.c b/arch/x86/pci/mrst.c
index 6e9e1a35a5d..8bf2fcb88d0 100644
--- a/arch/x86/pci/mrst.c
+++ b/arch/x86/pci/mrst.c
@@ -57,6 +57,10 @@ static int fixed_bar_cap(struct pci_bus *bus, unsigned int devfn)
u32 pcie_cap = 0, cap_data;
pos = PCIE_CAP_OFFSET;
+
+ if (!raw_pci_ext_ops)
+ return 0;
+
while (pos) {
if (raw_pci_ext_ops->read(pci_domain_nr(bus), bus->number,
devfn, pos, 4, &pcie_cap))