On 06/09/17 02:47, Andrew Lunn wrote:

Should this be done at the DSA level, or at the driver level?  Do any
chips do broadcast flooding in hardware already? Hence they currently
see broadcast duplication? If i add a broadcast mdb at the DSA level,
and the chip is already hard wired to flooding broadcast, is it going
to double flood?

Hi Andrew,

MT7530 and QCA8K only have a  "unknown mac fwd to port X" feature. both 
use the same HW table for FDB and MDB tables. so this should ideally be 
fixed on DSA level rather than fixing up those 2 drivers.

     John