linux-kernel - Re: [PATCH 0/3] ata port runtime power management support

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Message-ID: <CAOS58YM_cNXe5ZSMu-N2K02EjwyVheO2x80SoBYdrr6WgWv=dQ@mail.gmail.com>
Date:	Thu, 3 Nov 2011 07:59:24 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Jeff Garzik <jgarzik@...ox.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	James Bottomley <JBottomley@...allels.com>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Zhang, Rui" <rui.zhang@...el.com>
Subject: Re: [PATCH 0/3] ata port runtime power management support

Hello,

On Thu, Nov 3, 2011 at 7:47 AM, Lin Ming <ming.m.lin@...el.com> wrote:
>> > There will be ACPI firmware which supports ata port runtime D3Cold.
>> > To enable ata port runtime PM is the first step.
>>
>> libata can already turn off unused ports although it wouldn't go as
>> far as putting the whole controller into D3.
>
> At runtime?

Nope, I meant unoccupied (no device attached). IIRC it's part of the LPM code.

-- 
tejun
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