Input: mtk-pmic-keys - switch to for_each_child_of_node_scoped

Use the scoped variant of the macro to simplify the code and error
handling. This makes the error handling more robust by ensuring that
the child node is always freed.

Signed-off-by: Javier Carrasco <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Torokhov <[email protected]>

Author: javiercarrascocruz

drivers/input/keyboard/mtk-pmic-keys.c

@@ -307,7 +307,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 	int error, index = 0;
 	unsigned int keycount;
 	struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
-	struct device_node *node = pdev->dev.of_node, *child;
+	struct device_node *node = pdev->dev.of_node;
 	static const char *const irqnames[] = { "powerkey", "homekey" };
 	static const char *const irqnames_r[] = { "powerkey_r", "homekey_r" };
 	struct mtk_pmic_keys *keys;
@@ -343,24 +343,20 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	for_each_child_of_node(node, child) {
+	for_each_child_of_node_scoped(node, child) {
 		keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
 
 		keys->keys[index].irq =
 			platform_get_irq_byname(pdev, irqnames[index]);
-		if (keys->keys[index].irq < 0) {
-			of_node_put(child);
+		if (keys->keys[index].irq < 0)
 			return keys->keys[index].irq;
-		}
 
 		if (of_device_is_compatible(node, "mediatek,mt6358-keys")) {
 			keys->keys[index].irq_r = platform_get_irq_byname(pdev,
 									  irqnames_r[index]);
 
-			if (keys->keys[index].irq_r < 0) {
-				of_node_put(child);
+			if (keys->keys[index].irq_r < 0)
 				return keys->keys[index].irq_r;
-			}
 		}
 
 		error = of_property_read_u32(child,
@@ -369,18 +365,15 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 			dev_err(keys->dev,
 				"failed to read key:%d linux,keycode property: %d\n",
 				index, error);
-			of_node_put(child);
 			return error;
 		}
 
 		if (of_property_read_bool(child, "wakeup-source"))
 			keys->keys[index].wakeup = true;
 
 		error = mtk_pmic_key_setup(keys, &keys->keys[index]);
-		if (error) {
-			of_node_put(child);
+		if (error)
 			return error;
-		}
 
 		index++;
 	}