linux-kernel - Re: [linux-pm] Run-time PM idea (was: Re: [RFC][PATCH 0/2] PM: Rearrange core suspend code)

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Message-Id: <200906091648.09659.oliver@neukum.org>
Date:	Tue, 9 Jun 2009 16:48:09 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] Run-time PM idea (was: Re: [RFC][PATCH 0/2] PM: Rearrange core suspend code)

Am Dienstag, 9. Juni 2009 16:33:12 schrieb Alan Stern:
> On Tue, 9 Jun 2009, Oliver Neukum wrote:
> > But the problem here is STR or STD. How do you notify drivers that the
> > BIOS has resumed their device instead of autoresume() being called? A
> > driver has to know that its device has become active without its
> > knowledge.
>
> That would be a wonderful contradiction in terms.  :-)

A practical application of the uncertainty principle in quantum computing.

But you have to notify a driver if you notice that a device's power state
has been changed without the knowledge of its driver.

	Regards
		Oliver

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