linux-kernel - [PATCH v2 3/4] power: supply: max8925: Use devm_power_supply

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Date: Mon, 29 Jan 2024 13:02:45 -0600
From: Andrew Davis <afd@...com>
To: Sebastian Reichel <sre@...nel.org>,
        Support Opensource
	<support.opensource@...semi.com>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@...aro.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andrew Davis
	<afd@...com>
Subject: [PATCH v2 3/4] power: supply: max8925: Use devm_power_supply_register() helper

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

Signed-off-by: Andrew Davis <afd@...com>
---
 drivers/power/supply/max8925_power.c | 37 ++++++++--------------------
 1 file changed, 10 insertions(+), 27 deletions(-)

diff --git a/drivers/power/supply/max8925_power.c b/drivers/power/supply/max8925_power.c
index 4a2d6894f94ee..621a006d52a96 100644
--- a/drivers/power/supply/max8925_power.c
+++ b/drivers/power/supply/max8925_power.c
@@ -507,7 +507,6 @@ static int max8925_power_probe(struct platform_device *pdev)
 	struct power_supply_config psy_cfg = {}; /* Only for ac and usb */
 	struct max8925_power_pdata *pdata = NULL;
 	struct max8925_power_info *info;
-	int ret;
 
 	pdata = max8925_power_dt_init(pdev);
 	if (!pdata) {
@@ -528,25 +527,19 @@ static int max8925_power_probe(struct platform_device *pdev)
 	psy_cfg.supplied_to = pdata->supplied_to;
 	psy_cfg.num_supplicants = pdata->num_supplicants;
 
-	info->ac = power_supply_register(&pdev->dev, &ac_desc, &psy_cfg);
-	if (IS_ERR(info->ac)) {
-		ret = PTR_ERR(info->ac);
-		goto out;
-	}
+	info->ac = devm_power_supply_register(&pdev->dev, &ac_desc, &psy_cfg);
+	if (IS_ERR(info->ac))
+		return PTR_ERR(info->ac);
 	info->ac->dev.parent = &pdev->dev;
 
-	info->usb = power_supply_register(&pdev->dev, &usb_desc, &psy_cfg);
-	if (IS_ERR(info->usb)) {
-		ret = PTR_ERR(info->usb);
-		goto out_unregister_ac;
-	}
+	info->usb = devm_power_supply_register(&pdev->dev, &usb_desc, &psy_cfg);
+	if (IS_ERR(info->usb))
+		return PTR_ERR(info->usb);
 	info->usb->dev.parent = &pdev->dev;
 
-	info->battery = power_supply_register(&pdev->dev, &battery_desc, NULL);
-	if (IS_ERR(info->battery)) {
-		ret = PTR_ERR(info->battery);
-		goto out_unregister_usb;
-	}
+	info->battery = devm_power_supply_register(&pdev->dev, &battery_desc, NULL);
+	if (IS_ERR(info->battery))
+		return PTR_ERR(info->battery);
 	info->battery->dev.parent = &pdev->dev;
 
 	info->batt_detect = pdata->batt_detect;
@@ -558,24 +551,14 @@ static int max8925_power_probe(struct platform_device *pdev)
 
 	max8925_init_charger(chip, info);
 	return 0;
-out_unregister_usb:
-	power_supply_unregister(info->usb);
-out_unregister_ac:
-	power_supply_unregister(info->ac);
-out:
-	return ret;
 }
 
 static void max8925_power_remove(struct platform_device *pdev)
 {
 	struct max8925_power_info *info = platform_get_drvdata(pdev);
 
-	if (info) {
-		power_supply_unregister(info->ac);
-		power_supply_unregister(info->usb);
-		power_supply_unregister(info->battery);
+	if (info)
 		max8925_deinit_charger(info);
-	}
 }
 
 static struct platform_driver max8925_power_driver = {
-- 
2.39.2