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In case ftmac100 is used with a DSA switch, Linux wants to set MTU to 1504 to accommodate for DSA overhead. With the default max_mtu it leads to the error message: ftmac100 92000000.mac eth0: error -22 setting MTU to 1504 to include DSA overhead ftmac100 supports packet length 1518 (MAX_PKT_SIZE constant), so it is safe to report it in max_mtu. Signed-off-by: Sergei Antonov <saproj@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20220821160844.474277-1-saproj@gmail.com 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 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.