From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752935AbaCLXAO (ORCPT ); Wed, 12 Mar 2014 19:00:14 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:46127 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752671AbaCLXAL (ORCPT ); Wed, 12 Mar 2014 19:00:11 -0400 Date: Thu, 13 Mar 2014 00:00:08 +0100 From: Pavel Machek To: Matthew Garrett Cc: "rjw@rjwysocki.net" , "lenb@kernel.org" , "linux-kernel@vger.kernel.org" , "minyard@acm.org" , "linux-acpi@vger.kernel.org" Subject: Re: [PATCH V2] Change ACPI IPMI support to "default y" Message-ID: <20140312230007.GA1817@amd.pavel.ucw.cz> References: <1392740909-2079-1-git-send-email-matthew.garrett@nebula.com> <1511662.Ly2fOjCGKz@vostro.rjw.lan> <1392765307.3488.1.camel@x230.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1392765307.3488.1.camel@x230.lan> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2014-02-18 23:15:08, Matthew Garrett wrote: > On Wed, 2014-02-19 at 00:26 +0100, Rafael J. Wysocki wrote: > > On Tuesday, February 18, 2014 11:28:29 AM Matthew Garrett wrote: > > > > > > The ACPI IPMI driver implements IPMI operation region support for the ACPI > > > core. Systems that declare ACPI operation regions may reference them at any > > > time, including during kernel initialisation. These accesses will fail > > > unless the ACPI IPMI driver is present, and undesirable system behaviour > > > may result. Set the default to Y in order to encourage distributions and > > > users to configure kernels to avoid awkward surprises. > > > > Do you have any examples of problems caused by that or is this just theoretical > > at the moment? > > For example, if you load the ACPI power meter driver before you've > installed the ACPI IPMI driver you'll typically get failures (most > vendors implement it via IPMI). Would the right solution be to implement dependency between power meter and IMPI? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html