net: dsa: realtek: embed dsa_switch into realtek_priv

Embed dsa_switch within realtek_priv to eliminate the need for a second
memory allocation.
Suggested-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/realtek/realtek.h

@@ -61,7 +61,7 @@ struct realtek_priv {
 	const struct realtek_variant *variant;
 
 	spinlock_t		lock; /* Locks around command writes */
-	struct dsa_switch	*ds;
+	struct dsa_switch	ds;
 	struct irq_domain	*irqdomain;
 	bool			leds_disabled;
 

drivers/net/dsa/realtek/rtl8365mb.c

@@ -870,6 +870,7 @@ static int rtl8365mb_ext_config_rgmii(struct realtek_priv *priv, int port,
 {
 	const struct rtl8365mb_extint *extint =
 		rtl8365mb_get_port_extint(priv, port);
+	struct dsa_switch *ds = &priv->ds;
 	struct device_node *dn;
 	struct dsa_port *dp;
 	int tx_delay = 0;
@@ -880,7 +881,7 @@ static int rtl8365mb_ext_config_rgmii(struct realtek_priv *priv, int port,
 	if (!extint)
 		return -ENODEV;
 
-	dp = dsa_to_port(priv->ds, port);
+	dp = dsa_to_port(ds, port);
 	dn = dp->dn;
 
 	/* Set the RGMII TX/RX delay
@@ -1533,6 +1534,7 @@ static void rtl8365mb_get_stats64(struct dsa_switch *ds, int port,
 static void rtl8365mb_stats_setup(struct realtek_priv *priv)
 {
 	struct rtl8365mb *mb = priv->chip_data;
+	struct dsa_switch *ds = &priv->ds;
 	int i;
 
 	/* Per-chip global mutex to protect MIB counter access, since doing
@@ -1543,7 +1545,7 @@ static void rtl8365mb_stats_setup(struct realtek_priv *priv)
 	for (i = 0; i < priv->num_ports; i++) {
 		struct rtl8365mb_port *p = &mb->ports[i];
 
-		if (dsa_is_unused_port(priv->ds, i))
+		if (dsa_is_unused_port(ds, i))
 			continue;
 
 		/* Per-port spinlock to protect the stats64 data */
@@ -1559,12 +1561,13 @@ static void rtl8365mb_stats_setup(struct realtek_priv *priv)
 static void rtl8365mb_stats_teardown(struct realtek_priv *priv)
 {
 	struct rtl8365mb *mb = priv->chip_data;
+	struct dsa_switch *ds = &priv->ds;
 	int i;
 
 	for (i = 0; i < priv->num_ports; i++) {
 		struct rtl8365mb_port *p = &mb->ports[i];
 
-		if (dsa_is_unused_port(priv->ds, i))
+		if (dsa_is_unused_port(ds, i))
 			continue;
 
 		cancel_delayed_work_sync(&p->mib_work);
@@ -1963,7 +1966,7 @@ static int rtl8365mb_setup(struct dsa_switch *ds)
 		dev_info(priv->dev, "no interrupt support\n");
 
 	/* Configure CPU tagging */
-	dsa_switch_for_each_cpu_port(cpu_dp, priv->ds) {
+	dsa_switch_for_each_cpu_port(cpu_dp, ds) {
 		cpu->mask |= BIT(cpu_dp->index);
 
 		if (cpu->trap_port == RTL8365MB_MAX_NUM_PORTS)
@@ -1978,7 +1981,7 @@ static int rtl8365mb_setup(struct dsa_switch *ds)
 	for (i = 0; i < priv->num_ports; i++) {
 		struct rtl8365mb_port *p = &mb->ports[i];
 
-		if (dsa_is_unused_port(priv->ds, i))
+		if (dsa_is_unused_port(ds, i))
 			continue;
 
 		/* Forward only to the CPU */
@@ -1995,7 +1998,7 @@ static int rtl8365mb_setup(struct dsa_switch *ds)
 		 * ports will still forward frames to the CPU despite being
 		 * administratively down by default.
 		 */
-		rtl8365mb_port_stp_state_set(priv->ds, i, BR_STATE_DISABLED);
+		rtl8365mb_port_stp_state_set(ds, i, BR_STATE_DISABLED);
 
 		/* Set up per-port private data */
 		p->priv = priv;

drivers/net/dsa/realtek/rtl8366rb.c

@@ -1651,6 +1651,7 @@ static int rtl8366rb_get_mc_index(struct realtek_priv *priv, int port, int *val)
 
 static int rtl8366rb_set_mc_index(struct realtek_priv *priv, int port, int index)
 {
+	struct dsa_switch *ds = &priv->ds;
 	struct rtl8366rb *rb;
 	bool pvid_enabled;
 	int ret;
@@ -1675,7 +1676,7 @@ static int rtl8366rb_set_mc_index(struct realtek_priv *priv, int port, int index
 	 * not drop any untagged or C-tagged frames. Make sure to update the
 	 * filtering setting.
 	 */
-	if (dsa_port_is_vlan_filtering(dsa_to_port(priv->ds, port)))
+	if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port)))
 		ret = rtl8366rb_drop_untagged(priv, port, !pvid_enabled);
 
 	return ret;

drivers/net/dsa/realtek/rtl83xx.c

@@ -217,7 +217,7 @@ EXPORT_SYMBOL_NS_GPL(rtl83xx_probe, REALTEK_DSA);
  */
 int rtl83xx_register_switch(struct realtek_priv *priv)
 {
-	struct dsa_switch *ds;
+	struct dsa_switch *ds = &priv->ds;
 	int ret;
 
 	ret = priv->ops->detect(priv);
@@ -226,15 +226,10 @@ int rtl83xx_register_switch(struct realtek_priv *priv)
 		return ret;
 	}
 
-	ds = devm_kzalloc(priv->dev, sizeof(*ds), GFP_KERNEL);
-	if (!ds)
-		return -ENOMEM;
-
 	ds->priv = priv;
 	ds->dev = priv->dev;
 	ds->ops = priv->variant->ds_ops;
 	ds->num_ports = priv->num_ports;
-	priv->ds = ds;
 
 	ret = dsa_register_switch(ds);
 	if (ret) {
@@ -257,7 +252,9 @@ EXPORT_SYMBOL_NS_GPL(rtl83xx_register_switch, REALTEK_DSA);
  */
 void rtl83xx_unregister_switch(struct realtek_priv *priv)
 {
-	dsa_unregister_switch(priv->ds);
+	struct dsa_switch *ds = &priv->ds;
+
+	dsa_unregister_switch(ds);
 }
 EXPORT_SYMBOL_NS_GPL(rtl83xx_unregister_switch, REALTEK_DSA);
 
@@ -274,7 +271,9 @@ EXPORT_SYMBOL_NS_GPL(rtl83xx_unregister_switch, REALTEK_DSA);
  */
 void rtl83xx_shutdown(struct realtek_priv *priv)
 {
-	dsa_switch_shutdown(priv->ds);
+	struct dsa_switch *ds = &priv->ds;
+
+	dsa_switch_shutdown(ds);
 
 	dev_set_drvdata(priv->dev, NULL);
 }