From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764959AbYEFQ20 (ORCPT ); Tue, 6 May 2008 12:28:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753730AbYEFQ2Q (ORCPT ); Tue, 6 May 2008 12:28:16 -0400 Received: from mail.candelatech.com ([66.165.47.212]:36237 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752619AbYEFQ2P (ORCPT ); Tue, 6 May 2008 12:28:15 -0400 X-Greylist: delayed 1485 seconds by postgrey-1.27 at vger.kernel.org; Tue, 06 May 2008 12:28:15 EDT Message-ID: <4820813D.6050608@candelatech.com> Date: Tue, 06 May 2008 09:03:09 -0700 From: Ben Greear Organization: Candela Technologies User-Agent: Thunderbird 2.0.0.12 (X11/20080226) MIME-Version: 1.0 To: Alan Cox CC: Tetsuo Handa , 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(). References: <261636618@web.de> <200805022300.GIB30385.FJOVHQSMFtOOFL@I-love.SAKURA.ne.jp> <200805041716.DDG43279.JOSMHVFOFFQLOt@I-love.SAKURA.ne.jp> <20080505113055.5284052e@core> In-Reply-To: <20080505113055.5284052e@core> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Alan Cox wrote: >> (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. > For what it's worth, I've been seeing this problem since about 2.6.23 on several different systems, and will be happy to test patches. The work-around of changing the .config file will be fine in the meantime, it seems. Thanks, Ben > Alan > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Ben Greear Candela Technologies Inc http://www.candelatech.com