linux-kernel - Re: [patch 3/3] Enable Aggressive Link Power management for AHCI controllers.

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Message-ID: <20070612155824.GB14044@srcf.ucam.org>
Date:	Tue, 12 Jun 2007 16:58:24 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Dagfinn Ilmari Mannsåker <ilmari@...ari.org>,
	Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
	james.bottomley@...eleye.com, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	htejun@...il.com
Subject: Re: [patch 3/3] Enable Aggressive Link Power management for AHCI controllers.

On Tue, Jun 12, 2007 at 11:46:56AM -0400, Jeff Garzik wrote:
> Matthew Garrett wrote:
> >On Tue, Jun 12, 2007 at 11:17:14AM -0300, Henrique de Moraes Holschuh 
> >wrote:
> >>On Tue, 12 Jun 2007, Matthew Garrett wrote:
> >>>Laptop bays are designed to deal with hotplugging PATA - I don't think 
> >>>this is too much of an issue :)
> >>The new SATA ones use the SATA hardware hotplug ;-)   Just like the pci-e
> >>cards use usb2.0 and pci-e hotplug...
> >
> >Yes, but they'll also send an ACPI interrupt even if the SATA host 
> >controller doesn't - it's part of the spec for bays.
> 
> Regardless, having a laptop does not imply having a docking bay.

Excluding the corner case of an Expresscard SATA controller (where I 
suspect you'd want different policy), I doubt there are any cases where 
you have a laptop with hotplug capabilities without it being implemented 
as an ACPI bay.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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