Re: [rfc/rft]power management for btusb

[Marcel Holtmann <marcel@holtmann.org>]

Hi Oliver,

> > What are the semantics for usb_autopm_{get,put}_interface? Can we expect
> > to always get a suspend() and resume() callback?
> 
> usb_autopm_get_interface() guarantees that after it returns successsfully
> the interface (and teh device with it) remains unautosuspended until you
> call usb_autopm_put_interface. The calls stack with a counter.
> 
> You'll get a resume() callback only if the device was actually suspended.

so a device didn't start out suspended? Too bad, otherwise you could cut
the logic in the driver a lot.

I tried to run this on my Quad G5, but I never see suspend() or resume()
called. Do I have to do something to make autosuspend work?

Regards

Marcel