linux-kernel - Re: [linux-pm] [RFC] PCI: Runtime power management

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Message-ID: <20090815205817.GA30254@srcf.ucam.org>
Date:	Sat, 15 Aug 2009 21:58:17 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>, linux-usb@...r.kernel.org,
	linux-pci@...r.kernel.org, Greg KH <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [RFC] PCI: Runtime power management

On Sat, Aug 15, 2009 at 10:54:23PM +0200, Rafael J. Wysocki wrote:

> runtime_wakeup - if set, the device is allowed to do remote wakeup at run time
>   That could be represented as 'runtime_wakeup' under 'power' with the
>   following values:
>   * no value (empty file) is 'runtime' is 'disabled'
>   * 'enabled'
>   * 'disabled'
>   To set/unset the user space writes 'enabled'/'disabled' to it, respectively.
>   The default is set.

Why would you ever want runtime_wakeup to be false unless 
runtime_forbidden is true? Surely the point of runtime power management 
is to be transparent to the user, in which case remote wakeup is 
required?

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