--- zzzz-none-000/linux-2.6.39.4/drivers/net/usb/cdc_ncm.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/drivers/net/usb/cdc_ncm.c	2021-11-10 13:23:10.000000000 +0000
@@ -148,6 +148,19 @@
 		USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
 		.driver_info = (unsigned long)&cdc_ncm_info,
 	},
+    
+	/* AVM/WK Patch from Kernel 3.10 */
+        /* Huawei NCM devices disguised as vendor specific */
+        { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16),
+          .driver_info = (unsigned long)&cdc_ncm_info,
+        },
+        { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46),
+          .driver_info = (unsigned long)&cdc_ncm_info,
+        },
+        { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76),
+          .driver_info = (unsigned long)&cdc_ncm_info,
+        },
+
 	{
 	},
 };
@@ -1099,12 +1112,11 @@
 			break;
 
 		} else {
-			skb = skb_clone(skb_in, GFP_ATOMIC);
+			/* create a fresh copy to reduce truesize */
+			skb = netdev_alloc_skb_ip_align(dev->net, temp);
 			if (!skb)
 				goto error;
-			skb->len = temp;
-			skb->data = ((u8 *)skb_in->data) + offset;
-			skb_set_tail_pointer(skb, temp);
+			memcpy(skb_put(skb, temp), skb_in->data + offset, temp);
 			usbnet_skb_return(dev, skb);
 		}
 	}