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;