diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 97b026130c71..aa750485c63c 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -757,6 +757,15 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus)
 
 	if (dma_window == NULL)
 		pr_debug("  no ibm,dma-window property !\n");
+	/* There is an exception to the above. In case the PE goes into frozen
+	 * state, firmware may not provide ibm,dma-window property at the time
+	 * of LPAR boot up.
+	 */
+
+	if (!pdn) {
+		pr_debug("  no ibm,dma-window property !\n");
+		return;
+	}
 
 	ppci = PCI_DN(pdn);