From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kristen Carlson Accardi Subject: Re: [PATCH] ata: ahci: power off unused ports Date: Thu, 8 May 2008 17:28:59 -0700 Message-ID: <20080508172859.4b0cd9af@appleyard> References: <20080508161008.59361de5@appleyard> <20080508233713.GB15377@srcf.ucam.org> <20080508163555.51380949@appleyard> <20080509001458.GA16082@srcf.ucam.org> Reply-To: kristen.c.accardi@intel.com Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com ([134.134.136.20]:10262 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752317AbYEIAgV (ORCPT ); Thu, 8 May 2008 20:36:21 -0400 In-Reply-To: <20080509001458.GA16082@srcf.ucam.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Matthew Garrett Cc: jeff@garzik.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On Fri, 9 May 2008 01:14:58 +0100 Matthew Garrett wrote: > On Thu, May 08, 2008 at 04:35:55PM -0700, Kristen Carlson Accardi wrote: > > On Fri, 9 May 2008 00:37:13 +0100 > > Matthew Garrett wrote: > > > Just out of interest, is this set on laptop bays? (Are any of those even > > > native SATA yet?) > > > > I haven't seen any yet that are. Most of them are PATA. I expect > > that will change in the future. > > Yeah. My vague concern would be that on laptops, we can probably power > down the port even if it's declared as being hotplug capable - we'll > probably get an out of band signal from ACPI anyway. Not an issue at the > moment, but possibly something we'll hit in future. > well - when drive bays on laptops are able to be controlled by AHCI, they may not actually use _EJ0 or send notifications anymore, since ACPI will not longer be necessary for hotplugging. We'll have to see what happens.