net: dsa: mv88e6xxx: Add tx fwd offload PVT on intermediate devices

In a typical mv88e6xxx switch tree like this:

  CPU
   |    .----.
.--0--. | .--0--.
| sw0 | | | sw1 |
'-1-2-' | '-1-2-'
    '---'

If sw1p{1,2} are added to a bridge that sw0p1 is not a part of, sw0
still needs to add a crosschip PVT entry for the virtual DSA device
assigned to represent the bridge.

Fixes: ce5df6894a57 ("net: dsa: mv88e6xxx: map virtual bridges with forwarding offload in the PVT")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 45aaa73..dced150 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2531,6 +2531,7 @@ static int mv88e6xxx_crosschip_bridge_join(struct dsa_switch *ds,
 
        mv88e6xxx_reg_lock(chip);
        err = mv88e6xxx_pvt_map(chip, sw_index, port);
+       err = err ? : mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num);
        mv88e6xxx_reg_unlock(chip);
 
        return err;
@@ -2546,7 +2547,8 @@ static void mv88e6xxx_crosschip_bridge_leave(struct dsa_switch *ds,
                return;
 
        mv88e6xxx_reg_lock(chip);
-       if (mv88e6xxx_pvt_map(chip, sw_index, port))
+       if (mv88e6xxx_pvt_map(chip, sw_index, port) ||
+           mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num))
                dev_err(ds->dev, "failed to remap cross-chip Port VLAN\n");
        mv88e6xxx_reg_unlock(chip);
 }