1 files changed, 3 insertions, 3 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 7688ae073a..a529effe0d 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1470,13 +1470,13 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    memory_region_add_subregion_overlap(&sphb->iommu_root, 0,
+                                        spapr_tce_get_iommu(tcet), 0);
+
     /* Register default 32bit DMA window */
     spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
                            nb_table);
 
-    memory_region_add_subregion(&sphb->iommu_root, tcet->bus_offset,
-                                spapr_tce_get_iommu(tcet));
-
     sphb->msi = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
 }