Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758135Ab2EWU1F (ORCPT ); Wed, 23 May 2012 16:27:05 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:65089 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753141Ab2EWU1D (ORCPT ); Wed, 23 May 2012 16:27:03 -0400 Date: Wed, 23 May 2012 13:26:57 -0700 From: Tejun Heo To: =?iso-8859-1?Q?J=F6rg-Volker?= Peetz Cc: linux-kernel@vger.kernel.org, Takashi Iwai Subject: Re: Linux 3.4 released Message-ID: <20120523202657.GB3933@htj.dyndns.org> References: <4FBBB11D.7020904@web.de> <20120522155345.GC14339@google.com> <4FBBC461.4060008@web.de> <20120522170320.GD14339@google.com> <4FBBEDF2.8060803@web.de> <20120523182457.GD18143@google.com> <4FBD40F4.4090201@web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4FBD40F4.4090201@web.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1444 Lines: 40 Cc'ing Takashi. Hi! On Wed, May 23, 2012 at 09:56:36PM +0200, J?rg-Volker Peetz wrote: > May 23 21:32:33 hostname kernel: XXX delayed_work_timer_fn: cwq > (null), fn=hdmi_repoll_eld So, we have the winner. Takashi, sound/pci/hda/patch_hdmi.c::hdmi_repoll_eld() is causing workqueue code dereference %NULL pointer. It *looks* like something is corrupting the work item while it's queued. It could be a workqueue bug but I don't think that's likely - the code has been stable for quite some time now. I glanced through the code and nothing stands out. Does something ring a bell? > (without line-break). > > By the way, don't know if this is related, I have a phenomenon with a spurious > interrupt with every linux version I've used before on this notebook. Half a > minute after starting the system the computer produces approx. 220 lines like > > ... kernel: hda-intel: spurious response 0x0:0x0, last cmd=0x170503 > > Now with 3.4.0, I see an additional message right before (the minute before) the > "XXX ..." line: > > ...kernel: hda_intel: azx_get_response timeout, switching to single_cmd mode: > last cmd=0x003f0900 These too seem to be for you, Takashi. :) Thanks. -- tejun -- 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/