linux-kernel - Re: [PATCH v2 0/4] ata port runtime power management support

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Message-ID: <CAPXgP12-CxDBa0cHtM+ejczR4131tnvq3N0WKQ5egt4hb31kPg@mail.gmail.com>
Date:	Thu, 10 Nov 2011 17:02:41 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	Lin Ming <ming.m.lin@...el.com>, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-scsi@...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 v2 0/4] ata port runtime power management support

On Thu, Nov 10, 2011 at 16:30, Tejun Heo <tj@...nel.org> wrote:
> On Thu, Nov 10, 2011 at 02:22:42PM +0800, Lin Ming wrote:

>> v2 changes it to:
>>
>>         /sys/devices/pci0000:00/0000:00:1f.2    (ahci controller)
>>         |-- ata1                                (ata port)
>>             |-- host0                           (scsi host)
>>                 |-- target0:0:0                 (scsi target)
>>                     |-- 0:0:0:0                 (disk)
>>
>> So ata port runtime PM will happen as:

>> This is much cleaner and natural.
>
> Yeah, I really like this approach.  Nicely done.  I *think* the
> hierarchy change should be okay but cc'ing Kay just in case.

Looks good to me. All non-broken users of sysfs should be fine and
cope with changes like this without any problem.

Kay
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