On Thu, 26 Jan 2017, Jason Gerecke wrote:
> Commit 025bcc1 performed cleanup work on the 'wacom_pl_irq' function, making
> it follow the standards used in the rest of the codebase. The change
> unintiontionally allowed the function to send input events from reports
> that are not marked as being in prox. This can cause problems as the
> report values for X, Y, etc. are not guaranteed to be correct. In
> particular, occasionally the tablet will send a report with these values
> set to zero. If such a report is received it can caus an unexpected jump
> in the XY position.
>
> This patch surrounds more of the processing code with a proximity check,
> preventing these zeroed reports from overwriting the current state. To
> be safe, only the tool type and ABS_MISC events should be reported when
> the pen is marked as being out of prox.
>
> Fixes: 025bcc1540 ("HID: wacom: Simplify 'wacom_pl_irq'")
> Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx>
Applied, thanks.
--
Jiri Kosina
SUSE Labs
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