From 4958c5dc7bcb2e42d985cd26aeafd8a7eca9ab1e Mon Sep 17 00:00:00 2001 From: David Woodhouse <David.Woodhouse@intel.com> Date: Mon, 6 Apr 2009 13:30:01 -0700 Subject: [PATCH] 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> --- drivers/pci/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index fd7472f286742b..dcda5212f3bb9b 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; -- GitLab