Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759995AbZJGUHH (ORCPT ); Wed, 7 Oct 2009 16:07:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759976AbZJGUHH (ORCPT ); Wed, 7 Oct 2009 16:07:07 -0400 Received: from mail-bw0-f210.google.com ([209.85.218.210]:47815 "EHLO mail-bw0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759974AbZJGUHF convert rfc822-to-8bit (ORCPT ); Wed, 7 Oct 2009 16:07:05 -0400 MIME-Version: 1.0 In-Reply-To: <9b2b86520910071246r393f2afvacaa4d8f544508a8@mail.gmail.com> References: <20091007175403.GA335@trillian.comsick.at> <9b2b86520910071246r393f2afvacaa4d8f544508a8@mail.gmail.com> From: Kay Sievers Date: Wed, 7 Oct 2009 22:06:13 +0200 Message-ID: Subject: Re: [BUG] No ttyS0 - Strange udev 8250_pnp interaction To: Alan Jenkins Cc: Michael Guntsche , linux-kernel , linux-hotplug Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 937 Lines: 25 On Wed, Oct 7, 2009 at 21:46, Alan Jenkins wrote: > Udev would have avoided the race prior to > > 82c785e "udevd: remove check for dev_t, DEVPATH_OLD takes care of that" > > (the "check" removed here used to serialize events based on the device > major:minor number). > > So - udev probably needs to add the check back. What are the two devices with the same major/minor but a different DEVPATH? > It might also be the case that future kernels could set DEVPATH_OLD as > suggested.  I don't know the gory details of 8250_pnp though. The DEVPATH_OLD is only added when one and the same device was renamed or moved, which isn't the case here, I guess? Kay -- 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/