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Commit44f362c2cc("ASoC: rockchip: i2s: switch BCLK to GPIO") added pinctrl lookups, but did not skip the lookup if there was no pinctrl device tied to the I2S controller. As a result, the lookup was done on an invalid pointer in such cases, causing a kernel panic. Only do the subsequent pinctrl state lookups and switch if a pinctrl device was found. i2s_pinctrl_select_bclk_{on,off} already guard against missing pinctrl device or pinctrl state, so those two functions aren't touched. Fixes:44f362c2cc("ASoC: rockchip: i2s: switch BCLK to GPIO") Signed-off-by: Chen-Yu Tsai <wens@csie.org> Link: https://lore.kernel.org/r/20220621185747.2782-1-wens@kernel.org 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.