gpio: acpi: switch to device_for_each_child_node_scoped()

Switch to device_for_each_child_node_scoped() to simplify the code by
removing the need for a call to fwnode_handle_put() in the error path.

This also prevents possible memory leaks if new error paths are added
without the required call to fwnode_handle_put().

Signed-off-by: Javier Carrasco <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>

Author: javiercarrascocruz

drivers/gpio/gpiolib-acpi.c

@@ -1315,9 +1315,8 @@ acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip,
 static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
 {
 	struct gpio_chip *chip = achip->chip;
-	struct fwnode_handle *fwnode;
 
-	device_for_each_child_node(chip->parent, fwnode) {
+	device_for_each_child_node_scoped(chip->parent, fwnode) {
 		unsigned long lflags;
 		enum gpiod_flags dflags;
 		struct gpio_desc *desc;
@@ -1335,7 +1334,6 @@ static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
 		ret = gpiod_hog(desc, name, lflags, dflags);
 		if (ret) {
 			dev_err(chip->parent, "Failed to hog GPIO\n");
-			fwnode_handle_put(fwnode);
 			return;
 		}
 	}