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When a VLAN is added to a bridge port, a master VLAN gets created on the bridge for context, but it doesn't have the BRENTRY flag. Then, when the same VLAN is added to the bridge itself, that enters through the br_vlan_add_existing() code path and gains the BRENTRY flag, thus it becomes "existing". It seems natural to check for this condition early, because the current code flow is to notify switchdev of the addition of a VLAN that isn't a brentry, just to delete it immediately afterwards. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Acked-by: Nikolay Aleksandrov <nikolay@nvidia.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.