diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 2b8919a25392..475cc2d8b0e8 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -1359,6 +1359,8 @@ int sja1105_static_config_reload(struct sja1105_private *priv)
 	int rc, i;
 	s64 now;
 
+	mutex_lock(&priv->mgmt_lock);
+
 	mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
 
 	/* Back up the dynamic link speed changed by sja1105_adjust_port_config
@@ -1417,6 +1419,8 @@ out_unlock_ptp:
 			goto out;
 	}
 out:
+	mutex_unlock(&priv->mgmt_lock);
+
 	return rc;
 }