From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751959AbXDHTig (ORCPT ); Sun, 8 Apr 2007 15:38:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751970AbXDHTig (ORCPT ); Sun, 8 Apr 2007 15:38:36 -0400 Received: from 85.8.24.16.se.wasadata.net ([85.8.24.16]:46217 "EHLO smtp.drzeus.cx" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751959AbXDHTif (ORCPT ); Sun, 8 Apr 2007 15:38:35 -0400 Message-ID: <46194550.30203@drzeus.cx> Date: Sun, 08 Apr 2007 21:41:04 +0200 From: Pierre Ossman User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: Alex Dubov CC: linux-kernel@vger.kernel.org Subject: Re: Weird MMC errors: 1 of 2 - bad ocr value References: <20070314144437.3695.qmail@web36706.mail.mud.yahoo.com> In-Reply-To: <20070314144437.3695.qmail@web36706.mail.mud.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alex Dubov wrote: > Recently, I've obtained a bug report concerning an MMC card. Two problems are described, both > sporadic. > Problem 1: illegal ocr value is returned. You may notice, in the non-working case, obviously > incorrect ocr value (0xffffffff) is returned. The card won't work after this, unless reinserted. > What, to your opinion, shall we do about it? > I got something similar when there was problem with the power supply. The card was booting through power it drain from the other pins, but it didn't work correctly. Try adding some more delay after you power up in case the controller needs some time to stabilize. -- -- Pierre Ossman Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org