Re: [PATCH v2 5/5] PCI: Avoid unnecessary resume on shutdown

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On Sun, 2016-09-18 at 05:39 +0200, Lukas Wunner wrote:
> We currently perform a mandatory runtime resume of all PCI devices on
> ->shutdown.  However it is pointless to wake devices only to immediately
> power them down afterwards.  (Or have the firmware reset them, in case
> of a reboot.)
> 
> It seems there are only two cases when a runtime resume is actually
> necessary:  If the driver has declared a ->shutdown callback or if kexec
> is in progress.
> 
> Constrain resume of a device to these cases and let it slumber
> otherwise, thereby conserving energy and speeding up shutdown.

What happens if you get a wakeup event while going down?
Will it lead to a reboot when a shutdown has been requested?

	Regards
		Oliver


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