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eefe64fba9f2f2328c27ed9d9d02107083a62659
Current code calls gpiod_get_value() without error checking. Should the GPIO controller fail, execution would continue without any error message. Fix by checking for negative error values. Reported-by: Tom Rix <trix@redhat.com> Reviewed-by: Tom Rix <trix@redhat.com> Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Moritz Fischer <mdf@kernel.org>
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.
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