Re: suspending hid devices

Jiri Kosina <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Mon, 29 Jan 2007, Oliver Neukum wrote:

> > thanks, I think that basically killing output URBs is a good thing to do,
> I've looked further and the control URB will have to die, too.

Correct.

> > however the resuming will need some more thinking. What are all the 
> > scenarios you can see that waiters on hid->wait will be woken too early?
> 1) Resubmitting the IO upon resume() fails, error must be reported
> 2) The output transfer finishes before tasks are unfrozen

I think that creating a notifier chain which will be called in 
thaw_processes() after all the processes are unfrozen, will solve this 
problem, right?

-- 
Jiri Kosina

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