mlxsw: spectrum: Check if port is vPort using its VID

When L3 interfaces will be introduced a vPort won't necessarily have a
FID assigned to it. This can happen if it's not member in a bridge (in
which case it's assigned a vFID) or doesn't have an IP address (in which
case it's assigned an rFID).

Therefore, instead check the VID parameter to test whether a port is a
vPort or not.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -259,12 +259,6 @@ mlxsw_sp_port_lagged_get(struct mlxsw_sp *mlxsw_sp, u16 lag_id, u8 port_index)
 	return mlxsw_sp_port && mlxsw_sp_port->lagged ? mlxsw_sp_port : NULL;
 }
 
-static inline bool
-mlxsw_sp_port_is_vport(const struct mlxsw_sp_port *mlxsw_sp_port)
-{
-	return mlxsw_sp_port->vport.f;
-}
-
 static inline struct net_device *
 mlxsw_sp_vport_br_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
 {
@@ -277,6 +271,14 @@ mlxsw_sp_vport_vid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
 	return mlxsw_sp_vport->vport.vid;
 }
 
+static inline bool
+mlxsw_sp_port_is_vport(const struct mlxsw_sp_port *mlxsw_sp_port)
+{
+	u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
+
+	return vid != 0;
+}
+
 static inline u16
 mlxsw_sp_vport_fid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
 {