[RFC PATCH 3/4] iio: adc: fsl-imx25-gcq: Use __free(device_node)

[Jonathan Cameron <jic23@xxxxxxxxxx>]

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

Using automated cleanup reduces chance of an reference count leak
and simplfies the code.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
 drivers/iio/adc/fsl-imx25-gcq.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
index 68c813de0605..e04f92d7a953 100644
--- a/drivers/iio/adc/fsl-imx25-gcq.c
+++ b/drivers/iio/adc/fsl-imx25-gcq.c
@@ -199,7 +199,7 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 			       struct mx25_gcq_priv *priv)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct device_node *child;
+	struct device_node *child __free(device_node) = NULL;
 	struct device *dev = &pdev->dev;
 	int ret, i;
 
@@ -224,14 +224,12 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 		ret = of_property_read_u32(child, "reg", &reg);
 		if (ret) {
 			dev_err(dev, "Failed to get reg property\n");
-			of_node_put(child);
 			return ret;
 		}
 
 		if (reg >= MX25_NUM_CFGS) {
 			dev_err(dev,
 				"reg value is greater than the number of available configuration registers\n");
-			of_node_put(child);
 			return -EINVAL;
 		}
 
@@ -243,10 +241,9 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 		case MX25_ADC_REFP_XP:
 		case MX25_ADC_REFP_YP:
 			ret = mx25_gcq_ext_regulator_setup(&pdev->dev, priv, refp);
-			if (ret) {
-				of_node_put(child);
+			if (ret)
 				return ret;
-			}
+
 			priv->channel_vref_mv[reg] =
 				regulator_get_voltage(priv->vref[refp]);
 			/* Conversion from uV to mV */
@@ -257,7 +254,6 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 			break;
 		default:
 			dev_err(dev, "Invalid positive reference %d\n", refp);
-			of_node_put(child);
 			return -EINVAL;
 		}
 
@@ -270,12 +266,10 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 
 		if ((refp & MX25_ADCQ_CFG_REFP_MASK) != refp) {
 			dev_err(dev, "Invalid fsl,adc-refp property value\n");
-			of_node_put(child);
 			return -EINVAL;
 		}
 		if ((refn & MX25_ADCQ_CFG_REFN_MASK) != refn) {
 			dev_err(dev, "Invalid fsl,adc-refn property value\n");
-			of_node_put(child);
 			return -EINVAL;
 		}
 
-- 
2.43.0