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bceff719ef
When a (sensor) v4l2_subdev has its state_lock member set to non NULL, then all v4l2_subdev_state-s for the sensor share the same lock. atomisp_init_sensor() calls v4l2_subdev_lock_and_get_active_state() and then later on also tries to lock a separate v4l2_subdev_state used for try calls (rather then changing the active state), while still holding the active state lock. Since this try v4l2_subdev_state shares a lock with the active state this results in a deadlock. Skip locking try_sd_state when sensor->state_lock is set to avoid this. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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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.