diff --git a/include/net/dsa.h b/include/net/dsa.h
index e54332968417b5995acf4712f55a082a1a1dcfd1..2a8613b5a23d67dd7e7ccd6149718b32a9c05088 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -190,7 +190,7 @@ struct dsa_port {
 	struct dsa_switch	*ds;
 	unsigned int		index;
 	const char		*name;
-	struct dsa_port		*cpu_dp;
+	const struct dsa_port	*cpu_dp;
 	struct device_node	*dn;
 	unsigned int		ageing_time;
 	u8			stp_state;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 814ced75a0ccfb7945c966aaecc7d30536868e4a..cc7fe47dd4bffcb37cc87312b94af2dff95ae0c9 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1147,7 +1147,7 @@ static void dsa_slave_notify(struct net_device *dev, unsigned long val)
 
 int dsa_slave_create(struct dsa_port *port)
 {
-	struct dsa_port *cpu_dp = port->cpu_dp;
+	const struct dsa_port *cpu_dp = port->cpu_dp;
 	struct net_device *master = cpu_dp->master;
 	struct dsa_switch *ds = port->ds;
 	const char *name = port->name;