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The current code to unregister our ALSA device needs to be undone manually when we remove the HDMI driver. Since ALSA doesn't seem to support any mechanism to defer freeing something until the last user of the ALSA device is gone, we can either use a device-managed or a DRM-managed action. The consistent way would be to use a DRM-managed one, just like pretty much any framework-facing structure should be doing. However, ALSA does a lot of allocation and registration using device-managed calls. Thus, if we're going that way, by the time the DRM-managed action would run all of those allocation would have been freed and we would end up with a use-after-free. Thus, let's do a device-managed action. It's been tested with KASAN enabled and doesn't seem to trigger any issue, so it's as good as anything. Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20220711173939.1132294-42-maxime@cerno.tech
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.