Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932087AbWJGORM (ORCPT ); Sat, 7 Oct 2006 10:17:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932090AbWJGORM (ORCPT ); Sat, 7 Oct 2006 10:17:12 -0400 Received: from nf-out-0910.google.com ([64.233.182.188]:42633 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S932087AbWJGORL (ORCPT ); Sat, 7 Oct 2006 10:17:11 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=jtyMHMlCwOx3LZLBJWC7TSo9AQm06/auoxlRg6n8h1DL8ezE4nD2fYixGbsvR1GEHivFgT1MeGer4i5Thw+O60g+VGDYSvyPKFcVxLkL3LSo5yPEnhfu4sKbjK3bwTdPyQFkEOKpnyZstbfYWDt2Bfmvk3wjq2Ev8oET+VDygBs= Message-ID: <74d0deb30610070717k17079940ybedbf94dc8af8460@mail.gmail.com> Date: Sat, 7 Oct 2006 16:17:09 +0200 From: "pHilipp Zabel" To: "Pierre Ossman" Subject: Re: [PATCH] [MMC] Use own work queue Cc: rmk+lkml@arm.linux.org.uk, "Pierre Ossman" , linux-kernel@vger.kernel.org In-Reply-To: <20061001124240.16996.34557.stgit@poseidon.drzeus.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20061001124240.16996.34557.stgit@poseidon.drzeus.cx> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1400 Lines: 33 Hi, On 10/1/06, Pierre Ossman wrote: > The MMC layer uses the standard work queue for doing card detection. As > this queue is shared with other crucial subsystems, the effects of a long > (and perhaps buggy) detection can cause the system to be unusable. E.g. the > keyboard stops working while the detection routine is running. > > The solution is to add a specific mmc work queue to run the detection code > in. This is similar to how other subsystems handle detection (a full > kernel thread is the most common theme). > > Signed-off-by: Pierre Ossman This patch makes pxamci stop working for me on a HTC Magician (PXA272). Switching from 2.6.18 to 2.6.19-rc1 I got a kernel panic: mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 PXAMCI: clkrt = 0 cmdat = 0 VFS: Cannot open root device "mmcblk0p2" or unknown-block(0,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) After removing this patch from 2.6.19-rc1, everything is working again. Are there any changes to pxamci.c needed to be compatible with it? regards Philipp - 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/