From linux-kernel-owner+lkml=40e.kevb.net-S1753508AbYDMRkZ@vger.kernel.org Sun Apr 13 15:55:49 2008 Return-Path: X-Original-To: lkml@e.kevb.net Delivered-To: lkml@e.kevb.net Received: from mail2.rollernet.us (mail2.rollernet.us [216.90.171.2]) by e.kevb.net (Postfix) with ESMTP id 7A7211040365 for ; Sun, 13 Apr 2008 15:55:49 -0400 (EDT) Received: from mail2.rollernet.us (localhost [127.0.0.1]) by mail2.rollernet.us (Postfix) with ESMTP id EA8173054137 for ; Sun, 13 Apr 2008 10:40:30 -0700 (PDT) Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by mail2.rollernet.us (Postfix) with ESMTP for ; Sun, 13 Apr 2008 10:40:30 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753508AbYDMRkZ (ORCPT ); Sun, 13 Apr 2008 13:40:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751879AbYDMRkN (ORCPT ); Sun, 13 Apr 2008 13:40:13 -0400 Received: from out1.smtp.messagingengine.com ([66.111.4.25]:53786 "EHLO out1.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751591AbYDMRkM (ORCPT ); Sun, 13 Apr 2008 13:40:12 -0400 Received: from compute1.internal (compute1.internal [10.202.2.41]) by out1.messagingengine.com (Postfix) with ESMTP id D3A16FED50; Sun, 13 Apr 2008 13:40:10 -0400 (EDT) Received: from heartbeat1.messagingengine.com ([10.202.2.160]) by compute1.internal (MEProxy); Sun, 13 Apr 2008 13:40:10 -0400 X-Sasl-enc: tN65eKijyA/SZZVdllaVopFo7wq6/WX7KKTXuZhrYEvd 1208108410 Received: from thorin.khazad-dum.debian.net (unknown [201.82.162.50]) by mail.messagingengine.com (Postfix) with ESMTPSA id 1249C11F02; Sun, 13 Apr 2008 13:40:10 -0400 (EDT) Received: by thorin.khazad-dum.debian.net (Postfix, from userid 1000) id A16731E9521; Sun, 13 Apr 2008 14:40:05 -0300 (BRT) Date: Sun, 13 Apr 2008 14:40:05 -0300 From: Henrique de Moraes Holschuh To: Pavel Machek Cc: linux-kernel@vger.kernel.org, Ivo van Doorn , "John W. Linville" , Dmitry Torokhov Subject: Re: [PATCH 7/8] rfkill: add an "any radio" switch type and functionality Message-ID: <20080413174005.GB31364@khazad-dum.debian.net> References: <1207946244-14525-1-git-send-email-hmh@hmh.eng.br> <1207946244-14525-8-git-send-email-hmh@hmh.eng.br> <20080412195716.GA4639@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080412195716.GA4639@ucw.cz> X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Rollernet-Spf: tagging disabled X-Rollernet-Abuse: Processed by Roller Network Mail Services. See our abuse policy at http://rollernet.us/abuse.php X-Rollernet-Tracking: Tracking ID 21f5.4802458e.a5532.0 On Sat, 12 Apr 2008, Pavel Machek wrote: > On Fri 2008-04-11 17:37:23, Henrique de Moraes Holschuh wrote: > > Add a RFKILL_TYPE_ANY switch. This switch can control more than one type > > of radio, and it is always subject to toggling by any type of rfkill-input > > event. It is suitable to implement kill-all-radios functionality when > > coupled with input event EV_SW SW_RADIO. > > Hmm, how does that work with pcmcia ethernet card plugged in? I assume you mean PCMCIA WLAN card. 1. The hardware switch can't kill the WLAN card directly (so, unless software does something, the radio in the PCMCIA card ignores the switch). 2. But the hardware switch it is a master switch, so it will issue an input event, which, IF THE USER WANTS IT TO WORK will be either acted upon by rfkill-input or userspace. 3. rfkill-input or userspace will tell rfkill to switch all WLAN cards on or off, because of that input event. 4. The WLAN driver bound to the pcmcia WLAN device gets that command and changes the radio state. So, from the user PoV, the PCMCIA WLAN card ends up responding to the hardware switch, which is better behaviour even than what Windows could do :p > How does userspace know which radios this controls? It doesn't. Not even the hardware knows :) let alone the drivers... Which is why we shall try to make all master switches of a given type control all radios of the same type, so you can at least have some idea of what happens... and then the answer becomes "all radios of the same type/class", except for those whose drivers didn't implement an rfkill interface. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/