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Re: [PATCH v2] Input: evdev - Add EVIOC mechanism to extract the MT slot state

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On Fri, Jan 06, 2012 at 12:02:40PM -0800, Dmitry Torokhov wrote:
> On Fri, Jan 06, 2012 at 08:48:15PM +0100, Henrik Rydberg wrote:
> > > > Ok, maybe not to so easy after all, which probably answers my own
> > > > question. Looks like a EVIOCGMTSLOT, taking both slot and event code
> > > > as argument, would be the cleaner route to take. Another ioctl, how do we
> > > > feel about that?
> > > 
> > > What's the problem with userspace locking?
> > 
> > The idea was to get by without it.
> > 
> > Regarding ioctls, it does not seem realizable due to ioctl number
> > exhaustion.
> I am prettu sure we cabn spare 1 ioctl number. We just need to pass slot
> number not as part of ioctl number but in data instead. Like

Right, thanks. Perhaps we could even pass it as result data -
returning all mt data in one go? With the purpose being to capture the
full MT state, it ought to be both simpler and faster.

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