From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754188Ab1FCKsX (ORCPT ); Fri, 3 Jun 2011 06:48:23 -0400 Received: from cantor.suse.de ([195.135.220.2]:35327 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752664Ab1FCKsV convert rfc822-to-8bit (ORCPT ); Fri, 3 Jun 2011 06:48:21 -0400 From: Oliver Neukum Organization: SUSE To: Alexey ORISHKO Subject: Re: [PATCH] TODO FLAG_POINTTOPOINT => FLAG_WWAN? usbnet/cdc_ncm: mark ncm devices as "mobile broadband devices" with FLAG_WWAN Date: Fri, 3 Jun 2011 12:50:27 +0200 User-Agent: KMail/1.13.5 (Linux/3.0.0-rc1-12-desktop+; KDE/4.4.4; x86_64; ; ) Cc: "Valdis.Kletnieks@vt.edu" , Dan Williams , Stefan Metzmacher , Oliver Neukum , "Greg Kroah-Hartman" , "linux-usb@vger.kernel.org" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <1306922913-17803-1-git-send-email-metze@samba.org> <201106031201.21933.oneukum@suse.de> <2AC7D4AD8BA1C640B4C60C61C8E520153E3C13B620@EXDCVYMBSTM006.EQ1STM.local> In-Reply-To: <2AC7D4AD8BA1C640B4C60C61C8E520153E3C13B620@EXDCVYMBSTM006.EQ1STM.local> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Message-Id: <201106031250.28041.oneukum@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Freitag, 3. Juni 2011, 12:23:21 schrieb Alexey ORISHKO: > There is no difference between cdc_ncm and cdc_ether devices, besides > the fact cdc_ncm is more efficient in data transfer and cpu load. > The problem is that you cannot say much about device functionality based > just on interface name. As example existing devices with cdc_ether > interface could be mobile phone which provides connectivity to 3G network, > or could be a phone in the mode "over PC", where phone applications > access internet via broadband connection on PC (to save money). > > Network manager cannot simply make decision which devices can be used > for mobile broadband access based on interface name. It needs an additional > info, which does not exist in device descriptor. Well, but cdc-ether usually means that you can start up dhcp and use the interface as a network card. Can the same be done with cdc-ncm or do you always need to establish a connection through a secondary interface? Regards Oliver -- - - - SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg) Maxfeldstraße 5 90409 Nürnberg Germany - - -