linux-kernel - Re: [PATCH] ata: ahci: power off unused ports

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Message-ID: <20080602080440.25fc663c@core>
Date:	Mon, 2 Jun 2008 08:04:40 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Pavel Machek <pavel@....cz>,
	Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
	Theodore Tso <tytso@....edu>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ata: ahci: power off unused ports

> If you are talking about SATA -- incorrect.
> 
> The patch deals with policy, and the user MUST have the ability to 
> control this stuff.  Otherwise you create a situation where the user 
> might be denied hotplug use in valid cases, or similar negative situations.

The policy isn't however complicated. Tejun added the stuff for forcing
cable type and mode on setup and has therefore written all the per device
setup code we might need. Alternatively a single

	foo=1/0

option has been fine for acpi and will do fine for this. Total additional
cost - 1 line.

Alan
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