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If the VIN device is part of a group of VIN devices (all Gen3 boards) there is no reason to only unregister the group notifier if the VIN that registers the notifier is removed. The VIN that registers the notifier is always the last VIN device to be bound, so keeping the notifier around after any VIN is unbound creates an unbalanced state where no VIN in the group is operational. Fix this by unconditionally unregistering the notifier when any VIN device is unbound. Unregistering the notifier will lead to unbound() being called and all video devices exposed by any VIN instance to be removed. The lock was only needed to protect the check which VIN registers the notifier and is no longer needed. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@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.