diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index e7dbe21705ba..62b0d57ce104 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1210,12 +1210,16 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
 
 	case PCI_HEADER_TYPE_BRIDGE:
 		pci_bridge_check_ranges(bus);
+		pci_info(bus->self, "hotplug bridge: %d\n", bus->self->is_hotplug_bridge);
+		pci_info(bus->self, "io_window: %d\n", bus->self->io_window);
 		if (bus->self->is_hotplug_bridge) {
-			additional_io_size  = pci_hotplug_io_size;
+			if (bus->self->io_window)
+				additional_io_size = pci_hotplug_io_size;
 			additional_mem_size = pci_hotplug_mem_size;
 		}
 		/* Fall through */
 	default:
+		pci_info(bus->self, "additional_io_size: %pa\n", &additional_io_size);
 		pbus_size_io(bus, realloc_head ? 0 : additional_io_size,
 			     additional_io_size, realloc_head);