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commit36c0d93501upstream. In the ksz9477_fdb_dump function it reads the ALU control register and exit from the timeout loop if there is valid entry or search is complete. After exiting the loop, it reads the alu entry and report to the user space irrespective of entry is valid. It works till the valid entry. If the loop exited when search is complete, it reads the alu table. The table returns all ones and it is reported to user space. So bridge fdb show gives ff:ff:ff:ff:ff:ff as last entry for every port. To fix it, after exiting the loop the entry is reported only if it is valid one. Fixes:b987e98e50("dsa: add DSA switch driver for Microchip KSZ9477") Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20220816105516.18350-1-arun.ramadoss@microchip.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.