linux-kernel - Re: [linux-pm][PATCH] base: Change power/wakeup output from "" to "unsupported" if wakeup feature isn't supported by a device

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Date:	Fri, 4 Jan 2008 11:38:29 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	David Brownell <david-b@...bell.net>
cc:	yi.y.yang@...el.com, <pavel@....cz>,
	<linux-pm@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm][PATCH] base: Change power/wakeup output from "" to 
 "unsupported" if wakeup feature isn't supported by a device

On Fri, 4 Jan 2008, David Brownell wrote:

> > > This patch changes empty output to "unsupported" in order that a user knows
> > > wakeup feature isn't supported by this device when he/she
> > > 'cat /sys/devices/.../power/wakeup', please consider to apply,
> > > thanks.
> >
> > What about simply removing "wakuep" file if wakeup is not supported?
> 
> It may not *stay* unsupported, so I think changing it in either
> of those permanent ways would be confusing/misleading.

How about changing it to say "unavailable"?  That doesn't imply 
permanence.

Alan Stern

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