From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757860AbYEEKj6 (ORCPT ); Mon, 5 May 2008 06:39:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752630AbYEEKju (ORCPT ); Mon, 5 May 2008 06:39:50 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:34519 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751348AbYEEKjt (ORCPT ); Mon, 5 May 2008 06:39:49 -0400 Date: Mon, 5 May 2008 11:30:55 +0100 From: Alan Cox To: Tetsuo Handa Cc: rmk@arm.linux.org.uk, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG] NULL pointer dereference in uart_write_room(). Message-ID: <20080505113055.5284052e@core> In-Reply-To: <200805041716.DDG43279.JOSMHVFOFFQLOt@I-love.SAKURA.ne.jp> References: <261636618@web.de> <200805022300.GIB30385.FJOVHQSMFtOOFL@I-love.SAKURA.ne.jp> <200805041716.DDG43279.JOSMHVFOFFQLOt@I-love.SAKURA.ne.jp> 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 > (5) uart_remove_one_port() is called by serial8250_register_port() > since ttyS0 is already in use but it is requested to be once removed. That means 8250_pnp is taking over and then trying to delete the console, so its breakage in the serial layer glue. Perhaps Russell has some ideas as its hard to tell what he intended to happen originally. Alan