linux-kernel - [PATCH 02/18] leds: flash: mt6370: switch to device_for_each_child_node

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Message-Id: <20240927-leds_device_for_each_child_node_scoped-v1-2-95c0614b38c8@gmail.com>
Date: Fri, 27 Sep 2024 01:20:53 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Gene Chen <gene_chen@...htek.com>, 
 Jacek Anaszewski <jacek.anaszewski@...il.com>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Chen-Yu Tsai <wens@...e.org>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 02/18] leds: flash: mt6370: 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 calls to fwnode_handle_put() in the error paths.

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 <javier.carrasco.cruz@...il.com>
---
 drivers/leds/flash/leds-mt6370-flash.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/leds/flash/leds-mt6370-flash.c b/drivers/leds/flash/leds-mt6370-flash.c
index 912d9d622320..dbdbe92309db 100644
--- a/drivers/leds/flash/leds-mt6370-flash.c
+++ b/drivers/leds/flash/leds-mt6370-flash.c
@@ -509,7 +509,6 @@ static int mt6370_led_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mt6370_priv *priv;
-	struct fwnode_handle *child;
 	size_t count;
 	int i = 0, ret;
 
@@ -529,22 +528,18 @@ static int mt6370_led_probe(struct platform_device *pdev)
 	if (!priv->regmap)
 		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		struct mt6370_led *led = priv->leds + i;
 
 		led->priv = priv;
 
 		ret = mt6370_init_flash_properties(dev, led, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		ret = mt6370_led_register(dev, led, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		i++;
 	}

-- 
2.43.0