diff options
| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-04-06 13:30:01 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-04-06 13:30:01 -0700 |
| commit | 4958c5dc7bcb2e42d985cd26aeafd8a7eca9ab1e (patch) | |
| tree | 7bad2dac396fef6cca7f72132078a30e912b2589 /drivers/pci/intel-iommu.c | |
| parent | 276dbf997043cbf38f0087624e0f9c51742c8885 (diff) | |
| download | lwn-4958c5dc7bcb2e42d985cd26aeafd8a7eca9ab1e.tar.gz lwn-4958c5dc7bcb2e42d985cd26aeafd8a7eca9ab1e.zip | |
intel-iommu: Fix oops in device_to_iommu() when devices not found.
It's possible for a device in the drhd->devices[] array to be NULL if
it wasn't found at boot time, which means we have to check for that
case.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index fd7472f28674..dcda5212f3bb 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -485,7 +485,8 @@ static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) drhd->devices[i]->bus->number == bus && drhd->devices[i]->devfn == devfn) return drhd->iommu; - if (drhd->devices[i]->subordinate && + if (drhd->devices[i] && + drhd->devices[i]->subordinate && drhd->devices[i]->subordinate->number <= bus && drhd->devices[i]->subordinate->subordinate >= bus) return drhd->iommu; |