--- zzzz-none-000/linux-3.10.107/drivers/isdn/gigaset/bas-gigaset.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/isdn/gigaset/bas-gigaset.c	2021-02-04 17:41:59.000000000 +0000
@@ -2368,7 +2368,7 @@
 	endpoint = &hostif->endpoint[0].desc;
 	usb_fill_int_urb(ucs->urb_int_in, udev,
 			 usb_rcvintpipe(udev,
-					(endpoint->bEndpointAddress) & 0x0f),
+					usb_endpoint_num(endpoint)),
 			 ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs,
 			 endpoint->bInterval);
 	rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
@@ -2403,6 +2403,7 @@
 error:
 	freeurbs(cs);
 	usb_set_intfdata(interface, NULL);
+	usb_put_dev(udev);
 	gigaset_freecs(cs);
 	return rc;
 }