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The switch barely supports traffic I/O, and it does that by repurposing VLANs when there is no bridge that is taking control of them. Letting DSA declare this netdev feature as supported (see dsa_slave_create) would mean that VLAN sub-interfaces created on sja1105 switch ports will be hardware offloaded. That means that net/8021q/vlan_core.c would install the VLAN into the filter tables of the switch, potentially interfering with the tag_8021q VLANs. We need to prevent that from happening and not let the 8021q core offload VLANs to the switch hardware tables. In vlan_filtering=0 modes of operation, the switch ports can pass through VLAN-tagged frames with no problem. Suggested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Vladimir Oltean <olteanv@gmail.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.