From 259fef033ffe4e70bf7f358c53400a09f1b5384e Mon Sep 17 00:00:00 2001
From: Ben Chan <benchan@chromium.org>
Date: Wed, 19 Mar 2014 14:00:06 -0700
Subject: [PATCH] net: cdc_ncm: respect operator preferred MTU reported by MBIM

According to "Universal Serial Bus Communications Class Subclass
Specification for Mobile Broadband Interface Model, Revision 1.0,
Errata-1" published by USB-IF, the wMTU field of the MBIM extended
functional descriptor indicates the operator preferred MTU for IP data
streams.

This patch modifies cdc_ncm_setup to ensure that the MTU value set on
the usbnet device does not exceed the operator preferred MTU indicated
by wMTU if the MBIM device exposes a MBIM extended functional
descriptor.

Signed-off-by: Ben Chan <benchan@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
Reading git-format-patch failed