mlxsw: spectrum_switchdev: Flush port from MDB entries according to FID index

Currently, flushing port from all MDB entries is done when the last VLAN
is removed. This behavior is inaccurate, as port can be removed while there
is another port which uses the same VLAN, in such case, this is not the
last port which uses this VLAN and removed, but this port is supposed to be
removed from the MDB entries.

Flush the port from MDB when it is removed, regardless the state of other
ports. Flush only the MDB entries which are relevant for the same FID
index.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c

@@ -139,7 +139,8 @@ mlxsw_sp_bridge_port_fdb_flush(struct mlxsw_sp *mlxsw_sp,
 
 static void
 mlxsw_sp_bridge_port_mdb_flush(struct mlxsw_sp_port *mlxsw_sp_port,
-			       struct mlxsw_sp_bridge_port *bridge_port);
+			       struct mlxsw_sp_bridge_port *bridge_port,
+			       u16 fid_index);
 
 static int
 mlxsw_sp_bridge_mdb_mc_enable_sync(struct mlxsw_sp *mlxsw_sp,
@@ -1382,14 +1383,13 @@ mlxsw_sp_port_vlan_bridge_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
 	struct mlxsw_sp_bridge_vlan *bridge_vlan;
 	struct mlxsw_sp_bridge_port *bridge_port;
 	u16 vid = mlxsw_sp_port_vlan->vid;
-	bool last_port, last_vlan;
+	bool last_port;
 
 	if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_8021Q &&
 		    mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_8021D))
 		return;
 
 	bridge_port = mlxsw_sp_port_vlan->bridge_port;
-	last_vlan = list_is_singular(&bridge_port->vlans_list);
 	bridge_vlan = mlxsw_sp_bridge_vlan_find(bridge_port, vid);
 	last_port = list_is_singular(&bridge_vlan->port_vlan_list);
 
@@ -1401,8 +1401,9 @@ mlxsw_sp_port_vlan_bridge_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
 		mlxsw_sp_bridge_port_fdb_flush(mlxsw_sp_port->mlxsw_sp,
 					       bridge_port,
 					       mlxsw_sp_fid_index(fid));
-	if (last_vlan)
-		mlxsw_sp_bridge_port_mdb_flush(mlxsw_sp_port, bridge_port);
+
+	mlxsw_sp_bridge_port_mdb_flush(mlxsw_sp_port, bridge_port,
+				       mlxsw_sp_fid_index(fid));
 
 	mlxsw_sp_port_vlan_fid_leave(mlxsw_sp_port_vlan);
 
@@ -2528,7 +2529,8 @@ static int mlxsw_sp_port_mdb_del(struct mlxsw_sp_port *mlxsw_sp_port,
 
 static void
 mlxsw_sp_bridge_port_mdb_flush(struct mlxsw_sp_port *mlxsw_sp_port,
-			       struct mlxsw_sp_bridge_port *bridge_port)
+			       struct mlxsw_sp_bridge_port *bridge_port,
+			       u16 fid_index)
 {
 	struct mlxsw_sp_bridge_device *bridge_device;
 	struct mlxsw_sp_mdb_entry *mdb_entry, *tmp;
@@ -2538,6 +2540,9 @@ mlxsw_sp_bridge_port_mdb_flush(struct mlxsw_sp_port *mlxsw_sp_port,
 
 	list_for_each_entry_safe(mdb_entry, tmp, &bridge_device->mdb_list,
 				 list) {
+		if (mdb_entry->key.fid != fid_index)
+			continue;
+
 		if (test_bit(local_port, mdb_entry->ports_in_mid)) {
 			__mlxsw_sp_port_mdb_del(mlxsw_sp_port, bridge_port,
 						mdb_entry);