From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755431AbbCXSCH (ORCPT ); Tue, 24 Mar 2015 14:02:07 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:39160 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753452AbbCXSCF (ORCPT ); Tue, 24 Mar 2015 14:02:05 -0400 Date: Tue, 24 Mar 2015 18:01:56 +0000 From: Matthew Garrett To: Mario Limonciello Cc: Matt Fleming , Jason Ekstrand , LKML , Bard Liao , Liam Girdwood , "linux-acpi@vger.kernel.org" , "lenb@kernel.org" , "Rafael J. Wysocki" Subject: Re: [PATCH] ACPI: Adjust the return value of _REV on x86 Message-ID: <20150324180156.GA14658@srcf.ucam.org> References: <1426150247-18309-1-git-send-email-matthew.garrett@nebula.com> <1426363131-14530-1-git-send-email-jason.ekstrand@intel.com> <20150323120331.GA3007@codeblueprint.co.uk> <5510FB37.6030808@dell.com> <20150324152412.GA4706@codeblueprint.co.uk> <55119D4A.5050809@dell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55119D4A.5050809@dell.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 24, 2015 at 12:22:18PM -0500, Mario Limonciello wrote: > At that time rt286 I2S wasn't even in the kernel. Bard didn't start > to land it until later that year > (https://github.com/torvalds/linux/commit/07cf7cbadb4d97a78be61119a406de8fe446467e). > Was it really that crazy to plan Linux to take HDA mode? Since we don't expose any way for the platform to detect that it's running Linux, yes. > I would like to respectfully ask that this patch not be added to older > stable kernel versions. It will knowingly cause a regression with > hardware in the field. If this isn't an appropriate criteria for > avoiding to backport a patch to stable, what is? Will it? You haven't shipped the firmware that changes this behaviour yet. -- Matthew Garrett | mjg59@srcf.ucam.org