{
        struct gb_endo *endo = to_gb_endo(dev);
 
-       return sprintf(buf, "0x%02x\n", endo->ap_intf_id);
+       return sprintf(buf, "%u\n", endo->ap_intf_id);
 }
 static DEVICE_ATTR_RO(ap_intf_id);
 
 
 
        retval = device_add(&intf->dev);
        if (retval) {
-               pr_err("failed to add interface device for id 0x%02hhx\n",
-                      interface_id);
+               pr_err("failed to add interface %u\n", interface_id);
                goto free_intf;
        }
 
 
        ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
                                &request, sizeof(request), NULL, 0);
        if (ret)
-               pr_err("failed to destroy connection (%hhx:%hx %hhx:%hx) %d\n",
+               pr_err("failed to destroy connection (%hhu:%hu %hhu:%hu) %d\n",
                       intf1_id, cport1_id, intf2_id, cport2_id, ret);
 }
 EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
        ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
                                &request, sizeof(request), NULL, 0);
        if (ret)
-               pr_err("failed to destroy route (%hhx %hhx) %d\n",
+               pr_err("failed to destroy route (%hhu %hhu) %d\n",
                        intf1_id, intf2_id, ret);
 }