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[ Upstream commit4614792eeb] The CPTS driver registers PTP PHC clock when first netif is going up and unregister it when all netif are down. Now ethtool will show: - PTP PHC clock index 0 after boot until first netif is up; - the last assigned PTP PHC clock index even if PTP PHC clock is not registered any more after all netifs are down. This patch ensures that -1 is returned by ethtool when PTP PHC clock is not registered any more. Fixes:8a2c9a5ab4("net: ethernet: ti: cpts: rework initialization/deinitialization") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Link: https://lore.kernel.org/r/20201224162405.28032-1-grygorii.strashko@ti.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.