Re: [PATCH v2] Input - mt: Fix input_mt_get_slot_by_key

[Henrik Rydberg]

> "Creation, replacement and destruction of contacts is achieved by
> modifying the ABS_MT_TRACKING_ID of the associated slot.  A
> non-negative tracking id is interpreted as a contact, and the value -1
> denotes an unused slot.  A tracking id not previously present is
> considered new, and a tracking id no longer present is considered
> removed."
> 
> If some userspace is confused with missing -1 tracking ID for that
> slot, that userspace should be fixed.

I agree. Some userland applications work with add/remove out of convenience, and
cannot handle the more compressed notation the kernel slot handling allows.
Fixing those applications will be a good thing.

Unfortunately the patch already appeared in Linus' tree...

Henrik

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