From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754851Ab0JHHwX (ORCPT ); Fri, 8 Oct 2010 03:52:23 -0400 Received: from www.tglx.de ([62.245.132.106]:59809 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753565Ab0JHHwW (ORCPT ); Fri, 8 Oct 2010 03:52:22 -0400 Date: Fri, 8 Oct 2010 09:52:11 +0200 (CEST) From: Thomas Gleixner To: Dave Airlie cc: LKML , Ingo Molnar , Jesse Barnes Subject: Re: "do_IRQ: 0.89 No irq handler for vector (irq -1)" In-Reply-To: Message-ID: References: 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 Thu, 7 Oct 2010, Thomas Gleixner wrote: Oct 7 23:21:24 ionos kernel: Console: switching to colour VGA+ 80x25 > Oct 7 23:21:31 ionos kernel: drm: unregistered panic notifier > Oct 7 23:21:31 ionos kernel: vga_switcheroo: disabled > Oct 7 23:21:31 ionos kernel: [drm:drm_mm_takedown] *ERROR* Memory manager not clean. Delaying takedown > > That one scares me :) > > Oct 7 23:21:32 ionos kernel: BUG: unable to handle kernel paging request at 00000037362e313a > > We are again dereferencing a user space address. Further debugging shows that the interrupt is torn down and the vectors are cleared. On modprobe the irq is set up again and a different vector is assigned. The interrupt which comes in is going to the old vector. So something is stale in the card. Thanks, tglx