--- zzzz-none-000/linux-4.4.271/drivers/net/usb/cdc_ether.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/drivers/net/usb/cdc_ether.c	2023-04-19 10:22:29.000000000 +0000
@@ -54,11 +54,19 @@
 		desc->bInterfaceProtocol == 3);
 }
 
+static int is_novatel_rndis(struct usb_interface_descriptor *desc)
+{
+	return (desc->bInterfaceClass == USB_CLASS_MISC &&
+		desc->bInterfaceSubClass == 4 &&
+		desc->bInterfaceProtocol == 1);
+}
+
 #else
 
 #define is_rndis(desc)		0
 #define is_activesync(desc)	0
 #define is_wireless_rndis(desc)	0
+#define is_novatel_rndis(desc)	0
 
 #endif
 
@@ -150,7 +158,8 @@
 	 */
 	rndis = (is_rndis(&intf->cur_altsetting->desc) ||
 		 is_activesync(&intf->cur_altsetting->desc) ||
-		 is_wireless_rndis(&intf->cur_altsetting->desc));
+		 is_wireless_rndis(&intf->cur_altsetting->desc) ||
+		 is_novatel_rndis(&intf->cur_altsetting->desc));
 
 	memset(info, 0, sizeof(*info));
 	info->control = intf;
@@ -225,7 +234,12 @@
 			dev_dbg(&intf->dev,
 				"ACM capabilities %02x, not really RNDIS?\n",
 				header.usb_cdc_acm_descriptor->bmCapabilities);
-			goto bad_desc;
+
+/* == 20171008 AVM/VGJ - CHANGESET: Fix for buggy ZTE rndis modems, ignore buggy descriptor */
+#if 0
+ 					goto bad_desc;
+#endif
+
 	}
 
 	if (header.usb_cdc_ether_desc && info->ether->wMaxSegmentSize) {