Starting with OpenWrt 21.02 some devices now use upstream kernel drivers
for the built-in switch instead of relying on OpenWrt's swconfig driver.
The upstream kernel drivers use the Distributed Switch Architecture
(DSA) for configuration of the switch. Instead of explicitly configuring
the hardware switch, all ports appear as distinct interfaces and linux
bridges are offloaded to the hardware switch if possible.
To keep changes small, this patch adds support for DSA devices by
setting up a linux bridge, which is then treated just like the
cpuport-interface of the swconfig driver.
Signed-off-by: Fabian Bläse <fabian@blaese.de>
Tested-by: Fabian Bläse <fabian@blaese.de>
Fabian Bläse
15d259b98a