From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964989Ab2DKXVh (ORCPT ); Wed, 11 Apr 2012 19:21:37 -0400 Received: from mail-pz0-f52.google.com ([209.85.210.52]:51056 "EHLO mail-pz0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761517Ab2DKXVf (ORCPT ); Wed, 11 Apr 2012 19:21:35 -0400 Message-Id: <20120411231036.417475130@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Wed, 11 Apr 2012 16:10:40 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Oliver Neukum , Rabin Vincent , "David S. Miller" Subject: [ 05/59] net: usb: cdc_eem: fix mtu In-Reply-To: <20120411231213.GA13124@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rabin Vincent [ Upstream commit 78fb72f7936c01d5b426c03a691eca082b03f2b9 ] Make CDC EEM recalculate the hard_mtu after adjusting the hard_header_len. Without this, usbnet adjusts the MTU down to 1494 bytes, and the host is unable to receive standard 1500-byte frames from the device. Tested with the Linux USB Ethernet gadget. Cc: Oliver Neukum Signed-off-by: Rabin Vincent Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/cdc_eem.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/usb/cdc_eem.c +++ b/drivers/net/usb/cdc_eem.c @@ -93,6 +93,7 @@ static int eem_bind(struct usbnet *dev, /* no jumbogram (16K) support for now */ dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN; + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; return 0; }