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Always set a non-zero "Sw. Id." in the lower nibble of the Function/ASE and Software Identifier byte in HID++ 2.0 commands. As per the "Protocol HID++2.0 essential features" section in https://lekensteyn.nl/files/logitech/logitech_hidpp_2.0_specification_draft_2012-06-04.pdf " Software identifier (4 bits, unsigned) A number uniquely defining the software that sends a request. The firmware must copy the software identifier in the response but does not use it in any other ways. 0 Do not use (allows to distinguish a notification from a response). " Link: https://bugzilla.kernel.org/show_bug.cgi?id=215699 Signed-off-by: Bastien Nocera <hadess@hadess.net> 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.