Re: [linux-pm] [RFC][PATCH] PM: Introduce new top level suspend and hibernation callbacks (rev. 2)

[Oliver Neukum]

Am Dienstag, 25. März 2008 15:19:45 schrieb Alan Stern:
> On Tue, 25 Mar 2008, Oliver Neukum wrote:
> 
> > Am Dienstag, 25. März 2008 14:06:15 schrieb Rafael J. Wysocki:
> > > On Tuesday, 25 of March 2008, Oliver Neukum wrote:
> > 
> > > > A device that cannot wake up is unusable. Shouldn't the pm core disconnect()
> > > > such a device?
> 
> It's not safe for the PM core to do such things unilaterally.  The 
> decision to unregister a device should be made by the driver or the 
> subsystem.

Why? You can trigger it from user space via sysfs and in many cases
suspending to disk will disconnect all devices on a bus, so I'd say a
failure to resume is just a limited subcase of a device vanishing during
sleep.

	Regards
		Oliver

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