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SubjectRe: [PATCH v6 7/8, needs improvement] hid: add suspend/resume hooks for hid drivers
On Sun, 11 Apr 2010, Bruno Prémont wrote:

> > > As far as I understand the code, in auto-suspend case if the driver
> > > sends commands to the device it will have to call usbhid_wait_io().
> > > Please correct me if I'm wrong!
> >
> > It's not needed. There is a queuing mechanism in place on
> > 'resumption_waker' workqueue.
> So the driver is not allowed to ask the device to do something
> at auto-suspend time (as that would abort the auto-suspension).

What do you mean by "is not allowed" exactly?

Yes, it will wake the device up from auto-suspension. However, that's
usually what you want to happen, is there is anything you need to dispatch
to the device, isn't it?

What exactly is the situation you are trying to handle?


Jiri Kosina
SUSE Labs, Novell Inc.
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