--- zzzz-none-000/linux-2.6.39.4/drivers/net/usb/usbnet.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/drivers/net/usb/usbnet.c	2021-11-10 13:23:10.000000000 +0000
@@ -1381,6 +1381,8 @@
 		if (status < 0)
 			goto out1;
 
+/* --- 20160715 AVM/WK: FIX from AVM-Kernel 2.6.32: we always want usb0, not eth4  ---*/
+#if 0
 		// heuristic:  "usb%d" for links we know are two-host,
 		// else "eth%d" when there's reasonable doubt.  userspace
 		// can rename the link if it knows better.
@@ -1388,6 +1390,8 @@
 		    ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 ||
 		     (net->dev_addr [0] & 0x02) == 0))
 			strcpy (net->name, "eth%d");
+#endif
+
 		/* WLAN devices should always be named "wlan%d" */
 		if ((dev->driver_info->flags & FLAG_WLAN) != 0)
 			strcpy(net->name, "wlan%d");