diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a27d3eb14e8734f7a9a06f812912c260e9970f02..afbc8d6f6f8509cc399dbd3d640c8d7350bc47aa 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1297,6 +1297,13 @@ static void free_dmar_iommu(struct intel_iommu *iommu) if ((iommu->domains) && (iommu->domain_ids)) { for_each_set_bit(i, iommu->domain_ids, cap_ndoms(iommu->cap)) { + /* + * Domain id 0 is reserved for invalid translation + * if hardware supports caching mode. + */ + if (cap_caching_mode(iommu->cap) && i == 0) + continue; + domain = iommu->domains[i]; clear_bit(i, iommu->domain_ids);