linux-kernel - [PATCH 16/18] leds: tca6507: switch to device_for_each_child_node

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Message-Id: <20240927-leds_device_for_each_child_node_scoped-v1-16-95c0614b38c8@gmail.com>
Date: Fri, 27 Sep 2024 01:21:07 +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 16/18] leds: tca6507: 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 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 <javier.carrasco.cruz@...il.com>
---
 drivers/leds/leds-tca6507.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index 4f22f4224946..acbd8169723c 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -658,7 +658,6 @@ static struct tca6507_platform_data *
 tca6507_led_dt_init(struct device *dev)
 {
 	struct tca6507_platform_data *pdata;
-	struct fwnode_handle *child;
 	struct led_info *tca_leds;
 	int count;
 
@@ -671,7 +670,7 @@ tca6507_led_dt_init(struct device *dev)
 	if (!tca_leds)
 		return ERR_PTR(-ENOMEM);
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		struct led_info led;
 		u32 reg;
 		int ret;
@@ -688,10 +687,8 @@ tca6507_led_dt_init(struct device *dev)
 			led.flags |= TCA6507_MAKE_GPIO;
 
 		ret = fwnode_property_read_u32(child, "reg", &reg);
-		if (ret || reg >= NUM_LEDS) {
-			fwnode_handle_put(child);
+		if (ret || reg >= NUM_LEDS)
 			return ERR_PTR(ret ? : -EINVAL);
-		}
 
 		tca_leds[reg] = led;
 	}

-- 
2.43.0