From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756175Ab0A1NyN (ORCPT ); Thu, 28 Jan 2010 08:54:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756031Ab0A1NyL (ORCPT ); Thu, 28 Jan 2010 08:54:11 -0500 Received: from one.firstfloor.org ([213.235.205.2]:36158 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755114Ab0A1NyK (ORCPT ); Thu, 28 Jan 2010 08:54:10 -0500 Date: Thu, 28 Jan 2010 14:54:05 +0100 From: Andi Kleen To: dmitry.torokhov@gmail.com, linux-kernel@vger.kernel.org Subject: PNP PS/2 probing racy? Message-ID: <20100128135405.GA28931@basil.fritz.box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I noticed that on one test system of machine when booting the same kernel I get: PNP: No PS/2 controller found. Probing ports directly. serio: i8042 KBD port at 0x60,0x64 irq 1 serio: i8042 AUX port at 0x60,0x64 irq 12 and sometimes on another boot PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12 Since I presume the BIOS does not change, is it possible the Linux procedure for this PNP probe is racy? I haven't checked the code so far. Full boot logs for both cases: http://halobates.de/config/dmesg-pnprace-1 http://halobates.de/config/dmesg-pnprace-2 -Andi -- ak@linux.intel.com -- Speaking for myself only.