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The aux_ts_lock mutex is only required while the PTP clock has been successfully registered. stmmac_ptp_register() does not return any errors (as we don't wish to prevent the netdev being opened if PTP fails), stmmac_ptp_unregister() was coded to allow it to be called irrespective of whether PTP was successfully registered or not. Arrange for the aux_ts_lock mutex to be destroyed if the PTP clock is not functional during stmmac_ptp_register(), and only destroy it in stmmac_ptp_unregister() if we had a PTP clock registered. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Jakub Kicinski <kuba@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 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.