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The v4l2_m2m_get_vq() function never returns NULL. The check was probably intended to catch invalid format types, but that's not needed as the V4L2 core picks the appropriate VIDIOC_G_FMT ioctl handler based on the format type, so the type can't be incorrect. Drop the unneeded return value check and, as the return value is not used for other purposes and the function has no side effect, the function call as well. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Hans Verkuil <hverkuil+cisco@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 reStructuredText 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.