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7020449b8f
As GPIO probe function "devm_gpiod_get_optional()" may return error code, driver should identify GPIO desc as NULL to avoid crash. Acked-by: Tzung-Bi Shih <tzungbi@google.com> Signed-off-by: Xin Ji <xji@analogixsemi.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20211119015804.3824027-1-xji@analogixsemi.com Reviewed-by: Robert Foss <robert.foss@linaro.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.