linux-kernel - [PATCH 2/4] iio: adc: qcom-spmi-vadc: use scoped device_for_each_child

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Message-Id: <20240926-iio_device_for_each_child_node_scoped-v1-2-64ca8a424578@gmail.com>
Date: Thu, 26 Sep 2024 18:08:38 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Jonathan Cameron <jic23@...nel.org>, 
 Lars-Peter Clausen <lars@...afoo.de>, Chen-Yu Tsai <wens@...e.org>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Michael Hennerich <Michael.Hennerich@...log.com>
Cc: linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 2/4] iio: adc: qcom-spmi-vadc: use scoped
 device_for_each_child_node()

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 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/iio/adc/qcom-spmi-vadc.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index f5c6f1f27b2c..00a7f0982025 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -754,7 +754,6 @@ static int vadc_get_fw_data(struct vadc_priv *vadc)
 	const struct vadc_channels *vadc_chan;
 	struct iio_chan_spec *iio_chan;
 	struct vadc_channel_prop prop;
-	struct fwnode_handle *child;
 	unsigned int index = 0;
 	int ret;
 
@@ -774,12 +773,10 @@ static int vadc_get_fw_data(struct vadc_priv *vadc)
 
 	iio_chan = vadc->iio_chans;
 
-	device_for_each_child_node(vadc->dev, child) {
+	device_for_each_child_node_scoped(vadc->dev, child) {
 		ret = vadc_get_fw_channel_data(vadc->dev, &prop, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		prop.scale_fn_type = vadc_chans[prop.channel].scale_fn_type;
 		vadc->chan_props[index] = prop;

-- 
2.43.0