net: mdio: mux-mmioreg: Simplified with scoped function

Avoids the need for manual cleanup of_node_put() in early exits
from the loop by using for_each_available_child_of_node_scoped().
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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;
@@ -139,20 +139,18 @@ static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
 	 * 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;
 		}
 	}