f3efefb6fd
The locking rules in the driver came from era when sysfs attributes could live past the point of time when device would be unbound from the driver, and so used module-global semaphore (potentially shared between multiple yealink devices). Thankfully these times are long gone and attributes will not be accessible once they are removed. Simplify the logic by moving to per-device mutex, stop checking if there is driver data instance attached to the interface, and use guard notation to acquire the mutex. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20240710234855.311366-2-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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.