linux-kernel - Re: What's in hid.git for 2.6.30

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Date:	Fri, 1 May 2009 17:54:39 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Guillaume Chazarain <guichaz@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: What's in hid.git for 2.6.30

On Fri, 1 May 2009, Oliver Neukum wrote:

> > > > +       if (!(hid->claimed & HID_CLAIMED_INPUT))
> > > > +               return 0;
> > > > +
> > > is there a guarantee all keyboards will be claimed as input devices?
> > do you see any way how hid->inputs could currently be initialized other
> > than the device being claimed by hid-input?
> No, but I am worried about a false return of 0 here, not the other way
> round. This method is necessary because keyboards don't wake up
> if a key is released. Suspending a keyboard with a key pressed will lead
> to an endless repetition of that key.
> So I wonder whether it is possible to have a keyboard not claimed as an
> input device.

If driven by usbhid, the only way how keyboard could be handled if not 
claimed by hid-input is a userspace hiddev or hidraw driver. And we don't 
suspend if hidraw/hiddev node is open, right?

-- 
Jiri Kosina
SUSE Labs