From: Ben Hutchings <ben@decadent.org.uk>
Subject: cdc_ncm,cdc_mbim: Use NCM by default
Date: Sun, 31 Mar 2013 03:58:04 +0100
Forwarded: not-needed

Devices that support both NCM and MBIM modes should be kept in NCM
mode unless there is userland support for MBIM.

Set the default value of cdc_ncm.prefer_mbim to false and leave it to
userland (modem-manager) to override this with a modprobe.conf file
once it's ready to speak MBIM.

---
Index: linux/drivers/net/usb/cdc_ncm.c
===================================================================
--- linux.orig/drivers/net/usb/cdc_ncm.c
+++ linux/drivers/net/usb/cdc_ncm.c
@@ -53,11 +53,7 @@
 #include <linux/usb/cdc.h>
 #include <linux/usb/cdc_ncm.h>
 
-#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
-static bool prefer_mbim = true;
-#else
 static bool prefer_mbim;
-#endif
 module_param(prefer_mbim, bool, 0644);
 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");