Re: [PATCH v4 0/3] net: dsa: mv88e6xxx: add support for VLAN Table Unit

quoted

This is a limitation of the switch. So the driver needs to keep track
of which bridge a VLAN belongs to, if it is asked to accelerate the
same VLAN for a different bridge, it needs to say to the kernel,
sorry, cannot do that, and leave the kernel to do it in software.

Scott, how do you think this must be done? Returning a different error
code when trying to add a SWITCHDEV_OBJ_PORT_VLAN object?
Not sure how to query this fallback. Is -EOPNOTSUPP enough?

There was quite a bit of discussion about this a while back.  It
should return an error during the prepare phase. Looking at
__vlan_vid_add() and switchdev_fib_ipv4_add, it should return
EOPNOTSUPP.

	  Andrew