target/linux/layerscape/patches-5.4/701-net-0394-drivers-net-mscc_ocelot-don-t-flood-unicast-traffic-.patch

   1 From 714e8c634821b340c191a157e8c4e0b1afd53dfc Mon Sep 17 00:00:00 2001
   2 From: Alex Marginean <alexandru.marginean@nxp.com>
   3 Date: Wed, 8 Jan 2020 15:21:53 +0200
   4 Subject: [PATCH] drivers: net: mscc_ocelot: don't flood unicast traffic to cpu
   5
   6 Switch cpu port doesn't learn MAC addresses and the local bridge dev_addr
   7 must be explicitly added to the bridge.
   8 This is done whenever a port is added to a bridge, ports following the
   9 1st one will just overwrite the same entry.
  10
  11 Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
  12 ---
  13  drivers/net/ethernet/mscc/ocelot.c | 8 ++++++++
  14  1 file changed, 8 insertions(+)
  15
  16 --- a/drivers/net/ethernet/mscc/ocelot.c
  17 +++ b/drivers/net/ethernet/mscc/ocelot.c
  18 @@ -1680,6 +1680,8 @@ static int ocelot_port_obj_del(struct ne
  19  int ocelot_port_bridge_join(struct ocelot *ocelot, int port,
  20                             struct net_device *bridge)
  21  {
  22 +       struct ocelot_port *ocelot_port = ocelot->ports[port];
  23 +
  24         if (!ocelot->bridge_mask) {
  25                 ocelot->hw_bridge_dev = bridge;
  26         } else {
  27 @@ -1691,6 +1693,12 @@ int ocelot_port_bridge_join(struct ocelo
  28
  29         ocelot->bridge_mask |= BIT(port);
  30
  31 +       /* Direct CPU traffic to PCU port, this should override any existing
  32 +        * entries
  33 +        */
  34 +       ocelot_mact_learn(ocelot, PGID_CPU, bridge->dev_addr, ocelot_port->pvid,
  35 +                         ENTRYTYPE_LOCKED);
  36 +
  37         return 0;
  38  }
  39  EXPORT_SYMBOL(ocelot_port_bridge_join);