Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: [linux-pm] [RFC][PATCH] PM: Introduce new top level suspend and hibernation callbacks (rev. 2) | Date | Tue, 25 Mar 2008 15:24:33 +0100 |
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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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