mlxsw: spectrum_switchdev: Simplify mlxsw_sp_port_mc_disabled_set()

The above mentioned function is called for each port in bridge when the
multicast behavior is changed. Currently, it updates all the relevant
MID entries only for the first call, but the update of flooding per port
is done only for the port that it was called for it.

To simplify this behavior, it is possible to handle flooding for all the
ports in the first call, then, the other calls will do nothing. For
that, new functions are required to set flooding for all ports, no
'struct mlxsw_sp_port' is required.

This issue was found while extending this function for unified bridge
model, the above mentioned change will ease the extending later.
Signed-off-by: NAmit Cohen <amcohen@nvidia.com>
Signed-off-by: NIdo Schimmel <idosch@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -642,6 +642,64 @@ mlxsw_sp_bridge_port_flood_table_set(struct mlxsw_sp_port *mlxsw_sp_port,
 	return err;
 }
 
+static int
+mlxsw_sp_bridge_vlans_flood_set(struct mlxsw_sp_bridge_vlan *bridge_vlan,
+				enum mlxsw_sp_flood_type packet_type,
+				bool member)
+{
+	struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan;
+	int err;
+
+	list_for_each_entry(mlxsw_sp_port_vlan, &bridge_vlan->port_vlan_list,
+			    bridge_vlan_node) {
+		u16 local_port = mlxsw_sp_port_vlan->mlxsw_sp_port->local_port;
+
+		err = mlxsw_sp_fid_flood_set(mlxsw_sp_port_vlan->fid,
+					     packet_type, local_port, member);
+		if (err)
+			goto err_fid_flood_set;
+	}
+
+	return 0;
+
+err_fid_flood_set:
+	list_for_each_entry_continue_reverse(mlxsw_sp_port_vlan,
+					     &bridge_vlan->port_vlan_list,
+					     list) {
+		u16 local_port = mlxsw_sp_port_vlan->mlxsw_sp_port->local_port;
+
+		mlxsw_sp_fid_flood_set(mlxsw_sp_port_vlan->fid, packet_type,
+				       local_port, !member);
+	}
+
+	return err;
+}
+
+static int
+mlxsw_sp_bridge_ports_flood_table_set(struct mlxsw_sp_bridge_port *bridge_port,
+				      enum mlxsw_sp_flood_type packet_type,
+				      bool member)
+{
+	struct mlxsw_sp_bridge_vlan *bridge_vlan;
+	int err;
+
+	list_for_each_entry(bridge_vlan, &bridge_port->vlans_list, list) {
+		err = mlxsw_sp_bridge_vlans_flood_set(bridge_vlan, packet_type,
+						      member);
+		if (err)
+			goto err_bridge_vlans_flood_set;
+	}
+
+	return 0;
+
+err_bridge_vlans_flood_set:
+	list_for_each_entry_continue_reverse(bridge_vlan,
+					     &bridge_port->vlans_list, list)
+		mlxsw_sp_bridge_vlans_flood_set(bridge_vlan, packet_type,
+						!member);
+	return err;
+}
+
 static int
 mlxsw_sp_port_bridge_vlan_learning_set(struct mlxsw_sp_port *mlxsw_sp_port,
 				       struct mlxsw_sp_bridge_vlan *bridge_vlan,
@@ -854,18 +912,19 @@ static int mlxsw_sp_port_mc_disabled_set(struct mlxsw_sp_port *mlxsw_sp_port,
 	if (!bridge_device)
 		return 0;
 
-	if (bridge_device->multicast_enabled != !mc_disabled) {
-		bridge_device->multicast_enabled = !mc_disabled;
-		mlxsw_sp_bridge_mdb_mc_enable_sync(mlxsw_sp, bridge_device);
-	}
+	if (bridge_device->multicast_enabled == !mc_disabled)
+		return 0;
+
+	bridge_device->multicast_enabled = !mc_disabled;
+	mlxsw_sp_bridge_mdb_mc_enable_sync(mlxsw_sp, bridge_device);
 
 	list_for_each_entry(bridge_port, &bridge_device->ports_list, list) {
 		enum mlxsw_sp_flood_type packet_type = MLXSW_SP_FLOOD_TYPE_MC;
 		bool member = mlxsw_sp_mc_flood(bridge_port);
 
-		err = mlxsw_sp_bridge_port_flood_table_set(mlxsw_sp_port,
-							   bridge_port,
-							   packet_type, member);
+		err = mlxsw_sp_bridge_ports_flood_table_set(bridge_port,
+							    packet_type,
+							    member);
 		if (err)
 			return err;
 	}