Return-path: Received: from MAIL.IHTFP.ORG ([204.107.200.6]:53124 "EHLO mail.ihtfp.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762054AbXHCPKl (ORCPT ); Fri, 3 Aug 2007 11:10:41 -0400 To: "John W. Linville" Cc: network manager , Johannes Berg , linux-wireless@vger.kernel.org, "Winkler\, Tomas" , ipw3945-devel@lists.sourceforge.net Subject: Re: [ipw3945-devel] chaning mode only when interface down? References: <1186058047.24230.38.camel@johannes.berg> <46B1D28F.1080006@gmail.com> <1186059192.24230.44.camel@johannes.berg> <20070803145305.GE5137@tuxdriver.com> From: Derek Atkins Date: Fri, 03 Aug 2007 11:10:36 -0400 In-Reply-To: <20070803145305.GE5137@tuxdriver.com> (John W. Linville's message of "Fri\, 3 Aug 2007 10\:53\:05 -0400") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: "John W. Linville" writes: > On Fri, Aug 03, 2007 at 10:33:07AM -0400, Derek Atkins wrote: >> Johannes Berg writes: >> >> > On Thu, 2007-08-02 at 14:48 +0200, dragoran wrote: >> > >> >> > Nono, you cannot solve it in the driver. The whole design of mac80211 >> >> > mandates that assumption and I think it is a valid one to make. >> >> why? did the old way (allow mode changing while up) caused any problems? >> > >> > Why should it be allowed? Can you come up with a good reason for that >> > since you lose all state anyway when doing mode transitions? >> >> Um, what state? Sure you lose your layer 2 state, but why force a >> layer 3 lossage when you don't necessarily have to do so? For >> example, I've seen plenty of networks that have both 802.11(a) and >> 802.11(b/g) networks that share absolutely everything at layer 3. > > I think you are confusing a/b/g "mode" (which is _not_ the topic) > with AP/STA/IBSS/monitor "mode" (which is the topic). Indeed I am, mea culpa. I'll go shut up now. > John -derek -- Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory Member, MIT Student Information Processing Board (SIPB) URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH warlord@MIT.EDU PGP key available