From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262600AbVFJQ1F (ORCPT ); Fri, 10 Jun 2005 12:27:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262603AbVFJQ1E (ORCPT ); Fri, 10 Jun 2005 12:27:04 -0400 Received: from atlrel8.hp.com ([156.153.255.206]:51162 "EHLO atlrel8.hp.com") by vger.kernel.org with ESMTP id S262600AbVFJQ0w (ORCPT ); Fri, 10 Jun 2005 12:26:52 -0400 From: Bjorn Helgaas To: dtor_core@ameritech.net Subject: Re: PNP parallel&serial ports: module reload fails (2.6.11)? Date: Fri, 10 Jun 2005 10:26:23 -0600 User-Agent: KMail/1.8 Cc: Russell King , Michael Tokarev , Adam Belay , matthieu castet , Andrew Morton , linux-kernel@vger.kernel.org References: <20050602222400.GA8083@mut38-1-82-67-62-65.fbx.proxad.net> <200506101001.40980.bjorn.helgaas@hp.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200506101026.23885.bjorn.helgaas@hp.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 10 June 2005 10:20 am, Dmitry Torokhov wrote: > On 6/10/05, Bjorn Helgaas wrote: > > On Thursday 09 June 2005 3:16 pm, Russell King wrote: > > > The reason that 8250 first detects your ports is that they're found > > > via the legacy method which is independent of PnP. As you correctly > > > sumise, when you unload 8250_pnp, it disables the device so when you > > > re-load 8250, it's unable to detect your ports using the legacy method. > > > > > > But the legacy method needs to continue to exist for systems which > > > don't have PnP enabled. > > > > But shouldn't we someday move the legacy probing from 8250 > > into an 8250_platform and only do it if we don't have 8250_pnp? > > Given how much pain PNP/ACPI probing of i8042 was causing to everyone > I'd be cautious. BIOS writers are extremely creative. Maybe ia64 only > while x86 should default to legacy probing. Yeah, probably so :-( (ia64 already has no legacy 8250 probing.)