From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758994AbYD3RJd (ORCPT ); Wed, 30 Apr 2008 13:09:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755903AbYD3RJY (ORCPT ); Wed, 30 Apr 2008 13:09:24 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:38789 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1755132AbYD3RJY (ORCPT ); Wed, 30 Apr 2008 13:09:24 -0400 Date: Wed, 30 Apr 2008 18:01:33 +0100 From: Alan Cox To: John Clark Cc: linux-kernel@vger.kernel.org Subject: Re: Problem with 8250_pnp Module and using ttyS0 as console Message-ID: <20080430180133.1e1f940b@core> In-Reply-To: <48189FE7.9040208@metricsystems.com> References: <48189FE7.9040208@metricsystems.com> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 30 Apr 2008 09:35:51 -0700 John Clark wrote: > Linux version... at least as far back as 2.6.19 and upto and including > the latest > one I've tested, 2.6.25. > > > When the kernel has been configured to use ttyS0 as the console port, via > modification of the boot command line, 'console=ttyS0,115200', the kernel > ultimately traps with an exception, if the module "8250_pnp.ko" is loaded. > > Removing this module eliminates the fault. > > Is this a problem or a documented incompatibility? Hard to tell without the trace. Can you capture the trace and let me know. It's not supposed to give you an exception but we need to see the exception to change that.