From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751150AbZHSQEE (ORCPT ); Wed, 19 Aug 2009 12:04:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750961AbZHSQEE (ORCPT ); Wed, 19 Aug 2009 12:04:04 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:38121 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750845AbZHSQEC (ORCPT ); Wed, 19 Aug 2009 12:04:02 -0400 Date: Wed, 19 Aug 2009 17:05:01 +0100 From: Alan Cox To: "Rick L. Vinyard, Jr." Cc: "Greg KH" , "Linux USB" , "LKML" Subject: Re: Purpose of parameter in sysfs binary read Message-ID: <20090819170501.1dbd29a8@lxorguk.ukuu.org.uk> In-Reply-To: References: <9f97a27ccc13bd63ce99be04018b6bde.squirrel@intranet.cs.nmsu.edu> <20090818151427.GA6295@kroah.com> X-Mailer: Claws Mail 3.7.1 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 18 Aug 2009 09:41:56 -0600 "Rick L. Vinyard, Jr." wrote: > Greg KH wrote: > > On Tue, Aug 18, 2009 at 08:55:29AM -0600, Rick L. Vinyard, Jr. wrote: > > What are you using the binary sysfs attribute for? It should ONLY be > > used as a pass-through to and from hardware, with no interpretation by > > the kernel at all. > > It's for the Logitech G13's game panel image (a simple binary bitmap of > the pixels). > > It doesn't do any interpretation... just a few checks on the magic number > and size. If its a bitmap image why not register the device as a framebuffer ?