From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757645AbZHQK47 (ORCPT ); Mon, 17 Aug 2009 06:56:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756890AbZHQK47 (ORCPT ); Mon, 17 Aug 2009 06:56:59 -0400 Received: from www.tglx.de ([62.245.132.106]:50565 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751781AbZHQK46 (ORCPT ); Mon, 17 Aug 2009 06:56:58 -0400 Date: Mon, 17 Aug 2009 12:56:55 +0200 (CEST) From: Thomas Gleixner To: Michael Buesch cc: linux-kernel@vger.kernel.org Subject: Re: Threaded interrupt handlers broken? In-Reply-To: <200908171223.57412.mb@bu3sch.de> Message-ID: References: <200908161153.14081.mb@bu3sch.de> <200908162301.21775.mb@bu3sch.de> <200908171223.57412.mb@bu3sch.de> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 17 Aug 2009, Michael Buesch wrote: > Ok, I added some more debugging code: > http://bu3sch.de/patches/wireless-testing/20090817-1219/patches/001-hack-threaded-irqs.patch > > Here's the result: > http://bu3sch.de/misc/dmesg2 > > Is it possible that the irq_to_desc() in irq_thread() fails and the > resulting desc pointer points to something random? That could > probably explain why the bit is set and why the spinlock is > uninitialized. But it would not explain why desc->lock would still > work... Maybe irq_to_desc() returns a descriptor to another irq (!= > 52)? That would cause the whole irq code to fail. Can you send/upload your .config please ? Thanks, tglx