Merge branch 'net-simplified-with-scoped-function'

Jinjie Ruan says:

====================
net: Simplified with scoped function

Simplify with scoped for each OF child loop, as well as dev_err_probe().

Changes in v4:
- Drop the fix patch and __free() patch.
- Rebased on the fix patch has been stripped out.
- Remove the extra parentheses.
- Ensure Signed-off-by: should always be last.
- Add Reviewed-by.
- Update the cover letter commit message.

Changes in v3:
- Sort the variables, longest first, shortest last.
- Add Reviewed-by.

Changes in v2:
- Subject prefix: next -> net-next.
- Split __free() from scoped for each OF child loop clean.
- Fix use of_node_put() instead of __free() for the 5th patch.
====================

Link: https://patch.msgid.link/20240830031325.2406672-1-ruanjinjie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/microchip/ksz_common.c

@@ -4717,7 +4717,7 @@ static int ksz_parse_drive_strength(struct ksz_device *dev)
 int ksz_switch_register(struct ksz_device *dev)
 {
 	const struct ksz_chip_data *info;
-	struct device_node *port, *ports;
+	struct device_node *ports;
 	phy_interface_t interface;
 	unsigned int port_num;
 	int ret;
@@ -4803,12 +4803,11 @@ int ksz_switch_register(struct ksz_device *dev)
 		if (!ports)
 			ports = of_get_child_by_name(dev->dev->of_node, "ports");
 		if (ports) {
-			for_each_available_child_of_node(ports, port) {
+			for_each_available_child_of_node_scoped(ports, port) {
 				if (of_property_read_u32(port, "reg",
 							 &port_num))
 					continue;
 				if (!(dev->port_mask & BIT(port_num))) {
-					of_node_put(port);
 					of_node_put(ports);
 					return -EINVAL;
 				}

drivers/net/dsa/realtek/rtl8366rb.c

@@ -1009,8 +1009,8 @@ static int rtl8366rb_setup_all_leds_off(struct realtek_priv *priv)
 
 static int rtl8366rb_setup_leds(struct realtek_priv *priv)
 {
-	struct device_node *leds_np, *led_np;
 	struct dsa_switch *ds = &priv->ds;
+	struct device_node *leds_np;
 	struct dsa_port *dp;
 	int ret = 0;
 
@@ -1025,13 +1025,11 @@ static int rtl8366rb_setup_leds(struct realtek_priv *priv)
 			continue;
 		}
 
-		for_each_child_of_node(leds_np, led_np) {
+		for_each_child_of_node_scoped(leds_np, led_np) {
 			ret = rtl8366rb_setup_led(priv, dp,
 						  of_fwnode_handle(led_np));
-			if (ret) {
-				of_node_put(led_np);
+			if (ret)
 				break;
-			}
 		}
 
 		of_node_put(leds_np);

drivers/net/ethernet/broadcom/asp2/bcmasp.c

@@ -1300,9 +1300,9 @@ static void bcmasp_remove_intfs(struct bcmasp_priv *priv)
 
 static int bcmasp_probe(struct platform_device *pdev)
 {
-	struct device_node *ports_node, *intf_node;
 	const struct bcmasp_plat_data *pdata;
 	struct device *dev = &pdev->dev;
+	struct device_node *ports_node;
 	struct bcmasp_priv *priv;
 	struct bcmasp_intf *intf;
 	int ret = 0, count = 0;
@@ -1374,12 +1374,11 @@ static int bcmasp_probe(struct platform_device *pdev)
 	}
 
 	i = 0;
-	for_each_available_child_of_node(ports_node, intf_node) {
+	for_each_available_child_of_node_scoped(ports_node, intf_node) {
 		intf = bcmasp_interface_create(priv, intf_node, i);
 		if (!intf) {
 			dev_err(dev, "Cannot create eth interface %d\n", i);
 			bcmasp_remove_intfs(priv);
-			of_node_put(intf_node);
 			ret = -ENOMEM;
 			goto of_put_exit;
 		}

drivers/net/ethernet/marvell/mv643xx_eth.c

@@ -2802,7 +2802,7 @@ static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev,
 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
 {
 	struct mv643xx_eth_shared_platform_data *pd;
-	struct device_node *pnp, *np = pdev->dev.of_node;
+	struct device_node *np = pdev->dev.of_node;
 	int ret;
 
 	/* bail out if not registered from DT */
@@ -2816,10 +2816,9 @@ static int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
 
 	mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit);
 
-	for_each_available_child_of_node(np, pnp) {
+	for_each_available_child_of_node_scoped(np, pnp) {
 		ret = mv643xx_eth_shared_of_add_port(pdev, pnp);
 		if (ret) {
-			of_node_put(pnp);
 			mv643xx_eth_shared_of_remove();
 			return ret;
 		}

drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c

@@ -774,8 +774,8 @@ static int sun8i_dwmac_reset(struct stmmac_priv *priv)
 static int get_ephy_nodes(struct stmmac_priv *priv)
 {
 	struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-	struct device_node *mdio_mux, *iphynode;
 	struct device_node *mdio_internal;
+	struct device_node *mdio_mux;
 	int ret;
 
 	mdio_mux = of_get_child_by_name(priv->device->of_node, "mdio-mux");
@@ -793,22 +793,20 @@ static int get_ephy_nodes(struct stmmac_priv *priv)
 	}
 
 	/* Seek for internal PHY */
-	for_each_child_of_node(mdio_internal, iphynode) {
+	for_each_child_of_node_scoped(mdio_internal, iphynode) {
 		gmac->ephy_clk = of_clk_get(iphynode, 0);
 		if (IS_ERR(gmac->ephy_clk))
 			continue;
 		gmac->rst_ephy = of_reset_control_get_exclusive(iphynode, NULL);
 		if (IS_ERR(gmac->rst_ephy)) {
 			ret = PTR_ERR(gmac->rst_ephy);
 			if (ret == -EPROBE_DEFER) {
-				of_node_put(iphynode);
 				of_node_put(mdio_internal);
 				return ret;
 			}
 			continue;
 		}
 		dev_info(priv->device, "Found internal PHY node\n");
-		of_node_put(iphynode);
 		of_node_put(mdio_internal);
 		return 0;
 	}

drivers/net/mdio/mdio-mux-mmioreg.c

@@ -96,7 +96,7 @@ static int mdio_mux_mmioreg_switch_fn(int current_child, int desired_child,
 
 static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
 {
-	struct device_node *np2, *np = pdev->dev.of_node;
+	struct device_node *np = pdev->dev.of_node;
 	struct mdio_mux_mmioreg_state *s;
 	struct resource res;
 	const __be32 *iprop;
@@ -109,52 +109,42 @@ static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	ret = of_address_to_resource(np, 0, &res);
-	if (ret) {
-		dev_err(&pdev->dev, "could not obtain memory map for node %pOF\n",
-			np);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "could not obtain memory map for node %pOF\n", np);
 	s->phys = res.start;
 
 	s->iosize = resource_size(&res);
 	if (s->iosize != sizeof(uint8_t) &&
 	    s->iosize != sizeof(uint16_t) &&
-	    s->iosize != sizeof(uint32_t)) {
-		dev_err(&pdev->dev, "only 8/16/32-bit registers are supported\n");
-		return -EINVAL;
-	}
+	    s->iosize != sizeof(uint32_t))
+		return dev_err_probe(&pdev->dev, -EINVAL,
+				     "only 8/16/32-bit registers are supported\n");
 
 	iprop = of_get_property(np, "mux-mask", &len);
-	if (!iprop || len != sizeof(uint32_t)) {
-		dev_err(&pdev->dev, "missing or invalid mux-mask property\n");
-		return -ENODEV;
-	}
-	if (be32_to_cpup(iprop) >= BIT(s->iosize * 8)) {
-		dev_err(&pdev->dev, "only 8/16/32-bit registers are supported\n");
-		return -EINVAL;
-	}
+	if (!iprop || len != sizeof(uint32_t))
+		return dev_err_probe(&pdev->dev, -ENODEV,
+				     "missing or invalid mux-mask property\n");
+	if (be32_to_cpup(iprop) >= BIT(s->iosize * 8))
+		return dev_err_probe(&pdev->dev, -EINVAL,
+				     "only 8/16/32-bit registers are supported\n");
 	s->mask = be32_to_cpup(iprop);
 
 	/*
 	 * Verify that the 'reg' property of each child MDIO bus does not
 	 * set any bits outside of the 'mask'.
 	 */
-	for_each_available_child_of_node(np, np2) {
+	for_each_available_child_of_node_scoped(np, np2) {
 		u64 reg;
 
-		if (of_property_read_reg(np2, 0, &reg, NULL)) {
-			dev_err(&pdev->dev, "mdio-mux child node %pOF is "
-				"missing a 'reg' property\n", np2);
-			of_node_put(np2);
-			return -ENODEV;
-		}
-		if ((u32)reg & ~s->mask) {
-			dev_err(&pdev->dev, "mdio-mux child node %pOF has "
-				"a 'reg' value with unmasked bits\n",
-				np2);
-			of_node_put(np2);
-			return -ENODEV;
-		}
+		if (of_property_read_reg(np2, 0, &reg, NULL))
+			return dev_err_probe(&pdev->dev, -ENODEV,
+					     "mdio-mux child node %pOF is missing a 'reg' property\n",
+					     np2);
+		if ((u32)reg & ~s->mask)
+			return dev_err_probe(&pdev->dev, -ENODEV,
+					     "mdio-mux child node %pOF has a 'reg' value with unmasked bits\n",
+					     np2);
 	}
 
 	ret = mdio_mux_init(&pdev->dev, pdev->dev.of_node,

drivers/net/phy/phy_device.c

@@ -3407,7 +3407,7 @@ static int of_phy_led(struct phy_device *phydev,
 static int of_phy_leds(struct phy_device *phydev)
 {
 	struct device_node *node = phydev->mdio.dev.of_node;
-	struct device_node *leds, *led;
+	struct device_node *leds;
 	int err;
 
 	if (!IS_ENABLED(CONFIG_OF_MDIO))
@@ -3420,10 +3420,9 @@ static int of_phy_leds(struct phy_device *phydev)
 	if (!leds)
 		return 0;
 
-	for_each_available_child_of_node(leds, led) {
+	for_each_available_child_of_node_scoped(leds, led) {
 		err = of_phy_led(phydev, led);
 		if (err) {
-			of_node_put(led);
 			phy_leds_unregister(phydev);
 			return err;
 		}