From 3da4af0affbb797e8ac4c2b4598da0c34b8cc52a Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Tue, 13 Nov 2012 10:22:03 -0700 Subject: [PATCH] intel-iommu: Fix lookup in add device We can't assume this device exists, fall back to the bridge itself. Signed-off-by: Alex Williamson Tested-by: Matthew Thode Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel --- drivers/iommu/intel-iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index d4a4cd445cab..0badfa48b32b 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4108,7 +4108,7 @@ static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) static int intel_iommu_add_device(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); - struct pci_dev *bridge, *dma_pdev; + struct pci_dev *bridge, *dma_pdev = NULL; struct iommu_group *group; int ret; @@ -4122,7 +4122,7 @@ static int intel_iommu_add_device(struct device *dev) dma_pdev = pci_get_domain_bus_and_slot( pci_domain_nr(pdev->bus), bridge->subordinate->number, 0); - else + if (!dma_pdev) dma_pdev = pci_dev_get(bridge); } else dma_pdev = pci_dev_get(pdev); -- 2.20.1