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The generic routine, wacom_wac_pen_event, turns rotation value 90 degree anti-clockwise before posting the events. This non-zero event trggers a non-zero ABS_Z event for non art pen tools. However, HID_DG_TWIST is only supported by art pen. [jkosina@suse.cz: fix build: add missing brace] Cc: stable@vger.kernel.org Signed-off-by: Ping Cheng <ping.cheng@wacom.com> Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com> -- Hi Jiri, This is kind of a version 2 of the last one I posted two days ago. I updated the logic so it has less changed lines: 29 vs 158! Hopefully, the logic is easier to follow now. Please ignore the last one. Thank you! Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.