From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757682AbYDTIcl (ORCPT ); Sun, 20 Apr 2008 04:32:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756122AbYDTIbb (ORCPT ); Sun, 20 Apr 2008 04:31:31 -0400 Received: from gateway.drzeus.cx ([85.8.24.16]:36731 "EHLO smtp.drzeus.cx" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756012AbYDTIb3 (ORCPT ); Sun, 20 Apr 2008 04:31:29 -0400 Date: Sun, 20 Apr 2008 10:30:19 +0200 From: Pierre Ossman To: Alex Dubov Cc: David Brownell , Andrew Victor , Pavel Pisa , Carlos Aguiar , Anderson Briglia , "Syed Mohammed, Khasim" , Russell King , LKML Subject: Re: [RFC] MMC multiwrite capability removal Message-ID: <20080420103019.7c31cb9f@mjolnir.drzeus.cx> In-Reply-To: <896748.37554.qm@web36708.mail.mud.yahoo.com> References: <20080419095136.15a50cc9@mjolnir.drzeus.cx> <896748.37554.qm@web36708.mail.mud.yahoo.com> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.9; i386-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 Sat, 19 Apr 2008 19:34:12 -0700 (PDT) Alex Dubov wrote: > > tifm_sd relies on controller to report the number of successfully transferred > blocks. Of course, I cannot be sure to what extent the controller is > trustworthy. It worked fine until now, though. > Sounds like a perfect example of when we have to report 0 upon failures. I suspect most controllers will be like this as all the specs I've glanced at lack the detail needed to implement a proper sector count. The problems caused by reporting incorrect values here are extremely rare and difficult to provoke, so normal testing is not likely to uncover it. Rgds -- -- Pierre Ossman Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org