1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index e3e84cac0e98..466079535330 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1530,12 +1530,15 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
 
                 /* Skip top levels of page tables for
                  * iommu which has less agaw than default.
+                 * Unnecessary for PT mode.
                  */
-                for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
-                        pgd = phys_to_virt(dma_pte_addr(pgd));
-                        if (!dma_pte_present(pgd)) {
-                                spin_unlock_irqrestore(&iommu->lock, flags);
-                                return -ENOMEM;
+                if (translation != CONTEXT_TT_PASS_THROUGH) {
+                        for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
+                                pgd = phys_to_virt(dma_pte_addr(pgd));
+                                if (!dma_pte_present(pgd)) {
+                                        spin_unlock_irqrestore(&iommu->lock, flags);
+                                        return -ENOMEM;
+                                }
                         }
                 }
         }