[PATCH net-next v2 1/3] net: dsa: use slave device phydev

[Vivien Didelot]

There is no need to store a phy_device in dsa_slave_priv since
net_device already provides one. Simply s/p->phy/dev->phydev/.

While at it, return -ENODEV when it is NULL instead of -EOPNOTSUPP.

Signed-off-by: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx>
---
 net/dsa/slave.c | 126 ++++++++++++++++++++++++++------------------------------
 1 file changed, 58 insertions(+), 68 deletions(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 02ace7d462c4..3760472bf41d 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -99,15 +99,15 @@ static int dsa_slave_open(struct net_device *dev)
 	}
 
 	if (ds->ops->port_enable) {
-		err = ds->ops->port_enable(ds, p->dp->index, p->phy);
+		err = ds->ops->port_enable(ds, p->dp->index, dev->phydev);
 		if (err)
 			goto clear_promisc;
 	}
 
 	dsa_port_set_state_now(p->dp, stp_state);
 
-	if (p->phy)
-		phy_start(p->phy);
+	if (dev->phydev)
+		phy_start(dev->phydev);
 
 	return 0;
 
@@ -130,8 +130,8 @@ static int dsa_slave_close(struct net_device *dev)
 	struct net_device *master = dsa_master_netdev(p);
 	struct dsa_switch *ds = p->dp->ds;
 
-	if (p->phy)
-		phy_stop(p->phy);
+	if (dev->phydev)
+		phy_stop(dev->phydev);
 
 	dev_mc_unsync(master, dev);
 	dev_uc_unsync(master, dev);
@@ -144,7 +144,7 @@ static int dsa_slave_close(struct net_device *dev)
 		dev_uc_del(master, dev->dev_addr);
 
 	if (ds->ops->port_disable)
-		ds->ops->port_disable(ds, p->dp->index, p->phy);
+		ds->ops->port_disable(ds, p->dp->index, dev->phydev);
 
 	dsa_port_set_state_now(p->dp, BR_STATE_DISABLED);
 
@@ -273,12 +273,10 @@ dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 
 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	if (!dev->phydev)
+		return -ENODEV;
 
-	if (p->phy != NULL)
-		return phy_mii_ioctl(p->phy, ifr, cmd);
-
-	return -EOPNOTSUPP;
+	return phy_mii_ioctl(dev->phydev, ifr, cmd);
 }
 
 static int dsa_slave_port_attr_set(struct net_device *dev,
@@ -435,12 +433,10 @@ static int
 dsa_slave_get_link_ksettings(struct net_device *dev,
 			     struct ethtool_link_ksettings *cmd)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	if (!dev->phydev)
+		return -ENODEV;
 
-	if (!p->phy)
-		return -EOPNOTSUPP;
-
-	phy_ethtool_ksettings_get(p->phy, cmd);
+	phy_ethtool_ksettings_get(dev->phydev, cmd);
 
 	return 0;
 }
@@ -449,12 +445,10 @@ static int
 dsa_slave_set_link_ksettings(struct net_device *dev,
 			     const struct ethtool_link_ksettings *cmd)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	if (!dev->phydev)
+		return -ENODEV;
 
-	if (p->phy != NULL)
-		return phy_ethtool_ksettings_set(p->phy, cmd);
-
-	return -EOPNOTSUPP;
+	return phy_ethtool_ksettings_set(dev->phydev, cmd);
 }
 
 static void dsa_slave_get_drvinfo(struct net_device *dev,
@@ -488,24 +482,20 @@ dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 
 static int dsa_slave_nway_reset(struct net_device *dev)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	if (!dev->phydev)
+		return -ENODEV;
 
-	if (p->phy != NULL)
-		return genphy_restart_aneg(p->phy);
-
-	return -EOPNOTSUPP;
+	return genphy_restart_aneg(dev->phydev);
 }
 
 static u32 dsa_slave_get_link(struct net_device *dev)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	if (!dev->phydev)
+		return -ENODEV;
 
-	if (p->phy != NULL) {
-		genphy_update_link(p->phy);
-		return p->phy->link;
-	}
+	genphy_update_link(dev->phydev);
 
-	return -EOPNOTSUPP;
+	return dev->phydev->link;
 }
 
 static int dsa_slave_get_eeprom_len(struct net_device *dev)
@@ -640,7 +630,7 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 	int ret;
 
 	/* Port's PHY and MAC both need to be EEE capable */
-	if (!p->phy)
+	if (!dev->phydev)
 		return -ENODEV;
 
 	if (!ds->ops->set_mac_eee)
@@ -651,12 +641,12 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 		return ret;
 
 	if (e->eee_enabled) {
-		ret = phy_init_eee(p->phy, 0);
+		ret = phy_init_eee(dev->phydev, 0);
 		if (ret)
 			return ret;
 	}
 
-	return phy_ethtool_set_eee(p->phy, e);
+	return phy_ethtool_set_eee(dev->phydev, e);
 }
 
 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
@@ -666,7 +656,7 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 	int ret;
 
 	/* Port's PHY and MAC both need to be EEE capable */
-	if (!p->phy)
+	if (!dev->phydev)
 		return -ENODEV;
 
 	if (!ds->ops->get_mac_eee)
@@ -676,7 +666,7 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 	if (ret)
 		return ret;
 
-	return phy_ethtool_get_eee(p->phy, e);
+	return phy_ethtool_get_eee(dev->phydev, e);
 }
 
 #ifdef CONFIG_NET_POLL_CONTROLLER
@@ -985,26 +975,26 @@ static void dsa_slave_adjust_link(struct net_device *dev)
 	struct dsa_switch *ds = p->dp->ds;
 	unsigned int status_changed = 0;
 
-	if (p->old_link != p->phy->link) {
+	if (p->old_link != dev->phydev->link) {
 		status_changed = 1;
-		p->old_link = p->phy->link;
+		p->old_link = dev->phydev->link;
 	}
 
-	if (p->old_duplex != p->phy->duplex) {
+	if (p->old_duplex != dev->phydev->duplex) {
 		status_changed = 1;
-		p->old_duplex = p->phy->duplex;
+		p->old_duplex = dev->phydev->duplex;
 	}
 
-	if (p->old_pause != p->phy->pause) {
+	if (p->old_pause != dev->phydev->pause) {
 		status_changed = 1;
-		p->old_pause = p->phy->pause;
+		p->old_pause = dev->phydev->pause;
 	}
 
 	if (ds->ops->adjust_link && status_changed)
-		ds->ops->adjust_link(ds, p->dp->index, p->phy);
+		ds->ops->adjust_link(ds, p->dp->index, dev->phydev);
 
 	if (status_changed)
-		phy_print_status(p->phy);
+		phy_print_status(dev->phydev);
 }
 
 static int dsa_slave_fixed_link_update(struct net_device *dev,
@@ -1029,17 +1019,18 @@ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
 	struct dsa_slave_priv *p = netdev_priv(slave_dev);
 	struct dsa_switch *ds = p->dp->ds;
 
-	p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
-	if (!p->phy) {
+	slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
+	if (!slave_dev->phydev) {
 		netdev_err(slave_dev, "no phy at %d\n", addr);
 		return -ENODEV;
 	}
 
 	/* Use already configured phy mode */
 	if (p->phy_interface == PHY_INTERFACE_MODE_NA)
-		p->phy_interface = p->phy->interface;
-	return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
-				  p->phy_interface);
+		p->phy_interface = slave_dev->phydev->interface;
+
+	return phy_connect_direct(slave_dev, slave_dev->phydev,
+				  dsa_slave_adjust_link, p->phy_interface);
 }
 
 static int dsa_slave_phy_setup(struct net_device *slave_dev)
@@ -1091,22 +1082,23 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 				return ret;
 			}
 		} else {
-			p->phy = of_phy_connect(slave_dev, phy_dn,
-						dsa_slave_adjust_link,
-						phy_flags,
-						p->phy_interface);
+			slave_dev->phydev = of_phy_connect(slave_dev, phy_dn,
+							   dsa_slave_adjust_link,
+							   phy_flags,
+							   p->phy_interface);
 		}
 
 		of_node_put(phy_dn);
 	}
 
-	if (p->phy && phy_is_fixed)
-		fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
+	if (slave_dev->phydev && phy_is_fixed)
+		fixed_phy_set_link_update(slave_dev->phydev,
+					  dsa_slave_fixed_link_update);
 
 	/* We could not connect to a designated PHY, so use the switch internal
 	 * MDIO bus instead
 	 */
-	if (!p->phy) {
+	if (!slave_dev->phydev) {
 		ret = dsa_slave_phy_connect(slave_dev, p->dp->index);
 		if (ret) {
 			netdev_err(slave_dev, "failed to connect to port %d: %d\n",
@@ -1117,7 +1109,7 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 		}
 	}
 
-	phy_attached_info(p->phy);
+	phy_attached_info(slave_dev->phydev);
 
 	return 0;
 }
@@ -1137,12 +1129,12 @@ int dsa_slave_suspend(struct net_device *slave_dev)
 
 	netif_device_detach(slave_dev);
 
-	if (p->phy) {
-		phy_stop(p->phy);
+	if (slave_dev->phydev) {
+		phy_stop(slave_dev->phydev);
 		p->old_pause = -1;
 		p->old_link = -1;
 		p->old_duplex = -1;
-		phy_suspend(p->phy);
+		phy_suspend(slave_dev->phydev);
 	}
 
 	return 0;
@@ -1150,13 +1142,11 @@ int dsa_slave_suspend(struct net_device *slave_dev)
 
 int dsa_slave_resume(struct net_device *slave_dev)
 {
-	struct dsa_slave_priv *p = netdev_priv(slave_dev);
-
 	netif_device_attach(slave_dev);
 
-	if (p->phy) {
-		phy_resume(p->phy);
-		phy_start(p->phy);
+	if (slave_dev->phydev) {
+		phy_resume(slave_dev->phydev);
+		phy_start(slave_dev->phydev);
 	}
 
 	return 0;
@@ -1249,8 +1239,8 @@ void dsa_slave_destroy(struct net_device *slave_dev)
 	port_dn = p->dp->dn;
 
 	netif_carrier_off(slave_dev);
-	if (p->phy) {
-		phy_disconnect(p->phy);
+	if (slave_dev->phydev) {
+		phy_disconnect(slave_dev->phydev);
 
 		if (of_phy_is_fixed_link(port_dn))
 			of_phy_deregister_fixed_link(port_dn);
-- 
2.14.1