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3fcf94ef4d
If the hdmi-codec is on a codec-to-codec link, the substream pointer it receives is completely made up by snd_soc_dai_link_event(). The pointer will be different between startup() and shutdown(). The hdmi-codec complains when this happens even if it is not really a problem. The current_substream pointer is not used for anything useful apart from getting the exclusive ownership of the device. Remove current_substream pointer and replace the exclusive locking mechanism with a simple variable and some atomic operations. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@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.