linux-kernel - [PATCH 17/18] leds: rgb: ktd202x: switch to device_for_each_child_node

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Message-Id: <20240927-leds_device_for_each_child_node_scoped-v1-17-95c0614b38c8@gmail.com>
Date: Fri, 27 Sep 2024 01:21:08 +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 17/18] leds: rgb: ktd202x: 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/rgb/leds-ktd202x.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/rgb/leds-ktd202x.c b/drivers/leds/rgb/leds-ktd202x.c
index d5c442163c46..04e62faa3a00 100644
--- a/drivers/leds/rgb/leds-ktd202x.c
+++ b/drivers/leds/rgb/leds-ktd202x.c
@@ -495,7 +495,6 @@ static int ktd202x_add_led(struct ktd202x *chip, struct fwnode_handle *fwnode, u
 
 static int ktd202x_probe_fw(struct ktd202x *chip)
 {
-	struct fwnode_handle *child;
 	struct device *dev = chip->dev;
 	int count;
 	int i = 0;
@@ -509,13 +508,12 @@ static int ktd202x_probe_fw(struct ktd202x *chip)
 	/* Allow the device to execute the complete reset */
 	usleep_range(200, 300);
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		int ret = ktd202x_add_led(chip, child, i);
 
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
+
 		i++;
 	}
 

-- 
2.43.0