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If the DSA master implements strict address filtering, then the unicast and multicast addresses kept by the DSA CPU ports should be synchronized with the address lists of the DSA master. Note that we want the synchronization of the master's address lists even if the DSA switch doesn't support unicast/multicast database operations, on the premises that the packets will be flooded to the CPU in that case, and we should still instruct the master to receive them. This is why we do the dev_uc_add() etc first, even if dsa_port_notify() returns -EOPNOTSUPP. In turn, dev_uc_add() and friends return error only if memory allocation fails, so it is probably ok to check and propagate that error code and not just ignore it. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.