net: dsa: Pass dsa_port reference to ethtool setup/restore

We do not need to have a reference to a dsa_switch, instead we should
pass a reference to a CPU dsa_port, change that. This is a preliminary
change to better support multiple CPU ports.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/dsa.c

@@ -112,8 +112,9 @@ const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
 	return ops;
 }
 
-int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
+int dsa_cpu_port_ethtool_setup(struct dsa_port *cpu_dp)
 {
+	struct dsa_switch *ds = cpu_dp->ds;
 	struct net_device *master;
 	struct ethtool_ops *cpu_ops;
 
@@ -136,8 +137,9 @@ int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
 	return 0;
 }
 
-void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
+void dsa_cpu_port_ethtool_restore(struct dsa_port *cpu_dp)
 {
+	struct dsa_switch *ds = cpu_dp->ds;
 	struct net_device *master;
 
 	master = ds->dst->master_netdev;

net/dsa/dsa2.c

@@ -444,7 +444,7 @@ static int dsa_dst_apply(struct dsa_switch_tree *dst)
 	}
 
 	if (dst->cpu_dp) {
-		err = dsa_cpu_port_ethtool_setup(dst->cpu_dp->ds);
+		err = dsa_cpu_port_ethtool_setup(dst->cpu_dp);
 		if (err)
 			return err;
 	}
@@ -485,7 +485,7 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
 	}
 
 	if (dst->cpu_dp)
-		dsa_cpu_port_ethtool_restore(dst->cpu_dp->ds);
+		dsa_cpu_port_ethtool_restore(dst->cpu_dp);
 
 	pr_info("DSA: tree %d unapplied\n", dst->tree);
 	dst->applied = false;

net/dsa/dsa_priv.h

@@ -103,8 +103,8 @@ int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
 		      struct dsa_port *dport, int port);
 void dsa_cpu_dsa_destroy(struct dsa_port *dport);
 const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol);
-int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds);
-void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds);
+int dsa_cpu_port_ethtool_setup(struct dsa_port *cpu_dp);
+void dsa_cpu_port_ethtool_restore(struct dsa_port *cpu_dp);
 
 /* legacy.c */
 int dsa_legacy_register(void);

net/dsa/legacy.c

@@ -205,7 +205,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 		netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n",
 			   index);
 
-	ret = dsa_cpu_port_ethtool_setup(ds);
+	ret = dsa_cpu_port_ethtool_setup(ds->dst->cpu_dp);
 	if (ret)
 		return ret;
 
@@ -733,7 +733,7 @@ static void dsa_remove_dst(struct dsa_switch_tree *dst)
 			dsa_switch_destroy(ds);
 	}
 
-	dsa_cpu_port_ethtool_restore(dst->cpu_dp->ds);
+	dsa_cpu_port_ethtool_restore(dst->cpu_dp);
 
 	dev_put(dst->master_netdev);
 }