net: stmmac: remove plat_dat->port_node

There are repeated instances of:

	fwnode = priv->plat->port_node;
	if (!fwnode)
		fwnode = dev_fwnode(priv->device);

However, the only place that ->port_node is set is
stmmac_probe_config_dt():

	struct device_node *np = pdev->dev.of_node;
...
	/* PHYLINK automatically parses the phy-handle property */
	plat->port_node = of_fwnode_handle(np);

which is equivalent to dev_fwnode(&pdev->dev) and, as priv->device
will be &pdev->dev, is also equivalent to dev_fwnode(priv->device).

Thus, plat_dat->port_node doesn't provide any extra benefit over
using dev_fwnode(priv->device) directly.

There is one case where port_node is used directly, which can be
found in stmmac_pcs_setup(). This may cause a change of behaviour
as PCI drivers do not populate plat_dat->port_node, but
dev_fwnode(priv->device) may be valid. PCI-based stmmac should
be tested.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1vvuX3-0000000Avme-3oej@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 5 insertions, 19 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 5c144ac259af..4e788f54bbbc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1252,10 +1252,7 @@ static int stmmac_init_phy(struct net_device *dev)
 	    xpcs_get_an_mode(priv->hw->xpcs, mode) == DW_AN_C73)
 		return 0;
 
-	fwnode = priv->plat->port_node;
-	if (!fwnode)
-		fwnode = dev_fwnode(priv->device);
-
+	fwnode = dev_fwnode(priv->device);
 	if (fwnode)
 		phy_fwnode = fwnode_get_phy_node(fwnode);
 	else
@@ -1313,7 +1310,6 @@ static int stmmac_phylink_setup(struct stmmac_priv *priv)
 {
 	struct stmmac_mdio_bus_data *mdio_bus_data;
 	struct phylink_config *config;
-	struct fwnode_handle *fwnode;
 	struct phylink_pcs *pcs;
 	struct phylink *phylink;
 
@@ -1400,11 +1396,8 @@ static int stmmac_phylink_setup(struct stmmac_priv *priv)
 			config->wol_mac_support |= WAKE_MAGIC;
 	}
 
-	fwnode = priv->plat->port_node;
-	if (!fwnode)
-		fwnode = dev_fwnode(priv->device);
-
-	phylink = phylink_create(config, fwnode, priv->plat->phy_interface,
+	phylink = phylink_create(config, dev_fwnode(priv->device),
+				 priv->plat->phy_interface,
 				 &stmmac_phylink_mac_ops);
 	if (IS_ERR(phylink))
 		return PTR_ERR(phylink);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index a7c2496b39f2..485a0d790baa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -430,7 +430,7 @@ int stmmac_pcs_setup(struct net_device *ndev)
 	struct dw_xpcs *xpcs = NULL;
 	int addr, ret;
 
-	devnode = priv->plat->port_node;
+	devnode = dev_fwnode(priv->device);
 
 	if (priv->plat->pcs_init) {
 		ret = priv->plat->pcs_init(priv);
@@ -649,10 +649,7 @@ int stmmac_mdio_register(struct net_device *ndev)
 		stmmac_xgmac2_mdio_read_c45(new_bus, 0, 0, 0);
 
 	/* If fixed-link is set, skip PHY scanning */
-	fwnode = priv->plat->port_node;
-	if (!fwnode)
-		fwnode = dev_fwnode(priv->device);
-
+	fwnode = dev_fwnode(priv->device);
 	if (fwnode) {
 		fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
 		if (fixed_node) {
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 5c9fd91a1db9..c34998486293 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -446,9 +446,6 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 	 * they are not converted to phylink. */
 	plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
 
-	/* PHYLINK automatically parses the phy-handle property */
-	plat->port_node = of_fwnode_handle(np);
-
 	/* Get max speed of operation from device tree */
 	of_property_read_u32(np, "max-speed", &plat->max_speed);
 
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index b96ae9dadfab..77e51eaa5ec5 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -225,7 +225,6 @@ struct plat_stmmacenet_data {
 	phy_interface_t phy_interface;
 	struct stmmac_mdio_bus_data *mdio_bus_data;
 	struct device_node *phy_node;
-	struct fwnode_handle *port_node;
 	struct device_node *mdio_node;
 	struct stmmac_dma_cfg *dma_cfg;
 	struct stmmac_safety_feature_cfg *safety_feat_cfg;