[PATCH 20/21] power: supply: twl4030_madc: Use devm_iio_channel_get() helper

[Andrew Davis]

Use the device lifecycle managed get function. This helps prevent
mistakes like releasing out of order in cleanup functions and
forgetting to release on error paths.

Signed-off-by: Andrew Davis <afd@xxxxxx>
---
 drivers/power/supply/twl4030_madc_battery.c | 44 ++++++---------------
 1 file changed, 11 insertions(+), 33 deletions(-)

diff --git a/drivers/power/supply/twl4030_madc_battery.c b/drivers/power/supply/twl4030_madc_battery.c
index 33106476bea2c..cd9e94134ab21 100644
--- a/drivers/power/supply/twl4030_madc_battery.c
+++ b/drivers/power/supply/twl4030_madc_battery.c
@@ -188,30 +188,23 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
 	struct twl4030_madc_battery *twl4030_madc_bat;
 	struct twl4030_madc_bat_platform_data *pdata = pdev->dev.platform_data;
 	struct power_supply_config psy_cfg = {};
-	int ret = 0;
 
 	twl4030_madc_bat = devm_kzalloc(&pdev->dev, sizeof(*twl4030_madc_bat),
 				GFP_KERNEL);
 	if (!twl4030_madc_bat)
 		return -ENOMEM;
 
-	twl4030_madc_bat->channel_temp = iio_channel_get(&pdev->dev, "temp");
-	if (IS_ERR(twl4030_madc_bat->channel_temp)) {
-		ret = PTR_ERR(twl4030_madc_bat->channel_temp);
-		goto err;
-	}
+	twl4030_madc_bat->channel_temp = devm_iio_channel_get(&pdev->dev, "temp");
+	if (IS_ERR(twl4030_madc_bat->channel_temp))
+		return PTR_ERR(twl4030_madc_bat->channel_temp);
 
-	twl4030_madc_bat->channel_ichg = iio_channel_get(&pdev->dev, "ichg");
-	if (IS_ERR(twl4030_madc_bat->channel_ichg)) {
-		ret = PTR_ERR(twl4030_madc_bat->channel_ichg);
-		goto err_temp;
-	}
+	twl4030_madc_bat->channel_ichg = devm_iio_channel_get(&pdev->dev, "ichg");
+	if (IS_ERR(twl4030_madc_bat->channel_ichg))
+		return PTR_ERR(twl4030_madc_bat->channel_ichg);
 
-	twl4030_madc_bat->channel_vbat = iio_channel_get(&pdev->dev, "vbat");
-	if (IS_ERR(twl4030_madc_bat->channel_vbat)) {
-		ret = PTR_ERR(twl4030_madc_bat->channel_vbat);
-		goto err_ichg;
-	}
+	twl4030_madc_bat->channel_vbat = devm_iio_channel_get(&pdev->dev, "vbat");
+	if (IS_ERR(twl4030_madc_bat->channel_vbat))
+		return PTR_ERR(twl4030_madc_bat->channel_vbat);
 
 	/* sort charging and discharging calibration data */
 	sort(pdata->charging, pdata->charging_size,
@@ -227,21 +220,10 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
 	twl4030_madc_bat->psy = power_supply_register(&pdev->dev,
 						      &twl4030_madc_bat_desc,
 						      &psy_cfg);
-	if (IS_ERR(twl4030_madc_bat->psy)) {
-		ret = PTR_ERR(twl4030_madc_bat->psy);
-		goto err_vbat;
-	}
+	if (IS_ERR(twl4030_madc_bat->psy))
+		return PTR_ERR(twl4030_madc_bat->psy);
 
 	return 0;
-
-err_vbat:
-	iio_channel_release(twl4030_madc_bat->channel_vbat);
-err_ichg:
-	iio_channel_release(twl4030_madc_bat->channel_ichg);
-err_temp:
-	iio_channel_release(twl4030_madc_bat->channel_temp);
-err:
-	return ret;
 }
 
 static void twl4030_madc_battery_remove(struct platform_device *pdev)
@@ -249,10 +231,6 @@ static void twl4030_madc_battery_remove(struct platform_device *pdev)
 	struct twl4030_madc_battery *bat = platform_get_drvdata(pdev);
 
 	power_supply_unregister(bat->psy);
-
-	iio_channel_release(bat->channel_vbat);
-	iio_channel_release(bat->channel_ichg);
-	iio_channel_release(bat->channel_temp);
 }
 
 static struct platform_driver twl4030_madc_battery_driver = {
-- 
2.39.2