From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH RFC] ahci: implement handoff quirk Date: Thu, 17 Dec 2009 01:34:34 -0500 Message-ID: <4B29D0FA.6060805@garzik.org> References: <485882FE.1060409@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-gx0-f211.google.com ([209.85.217.211]:46123 "EHLO mail-gx0-f211.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763350AbZLQGel (ORCPT ); Thu, 17 Dec 2009 01:34:41 -0500 Received: by gxk3 with SMTP id 3so846333gxk.1 for ; Wed, 16 Dec 2009 22:34:41 -0800 (PST) In-Reply-To: <485882FE.1060409@kernel.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: IDE/ATA development list , "Zhao, Richard" , shane.huang@amd.com On 06/17/2008 11:37 PM, Tejun Heo wrote: > ahci 1.2 has an exciting! new feature called BIOS/OS handoff which > basically is there to allow BIOS to keep tinkering with the controller > even after OS starts executing. I have no idea what this is useful > for but it's there and we need to do it. > > This patch implements the handoff as FIXUP_HEADER as the controller > needs to be claimed before the OS changes any configuration including > IRQ routing. > > I'm yet to see any controller which actually requires this, so it's > not for inclusion yet. Maybe keep this in a separate branch? > > RFC, DON'T COMMIT > --- > drivers/pci/quirks.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 109 insertions(+) Looking through old emails... did AMD ever confirm the usefulness of this patch? Is it actually needed in the field? I'm guessing the silence implies "No"... :) Jeff