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-rw-r--r--drivers/iommu/intel-iommu.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ff5a30a94679..1ff45b2d03ab 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2500,6 +2500,12 @@ static int domain_setup_first_level(struct intel_iommu *iommu,
flags);
}
+static bool dev_is_real_dma_subdevice(struct device *dev)
+{
+ return dev && dev_is_pci(dev) &&
+ pci_real_dma_dev(to_pci_dev(dev)) != to_pci_dev(dev);
+}
+
static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
int bus, int devfn,
struct device *dev,
@@ -4975,7 +4981,8 @@ static void __dmar_remove_one_dev_info(struct device_domain_info *info)
PASID_RID2PASID, false);
iommu_disable_dev_iotlb(info);
- domain_context_clear(iommu, info->dev);
+ if (!dev_is_real_dma_subdevice(info->dev))
+ domain_context_clear(iommu, info->dev);
intel_pasid_free_table(info->dev);
}