linux-kernel - [PATCH 12/21] power: supply: tps65090: Use devm_power_supply

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Date: Tue, 23 Jan 2024 10:36:44 -0600
From: Andrew Davis <afd@...com>
To: Sebastian Reichel <sre@...nel.org>,
        Support Opensource
	<support.opensource@...semi.com>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@...aro.org>,
        Pali Rohár
	<pali@...nel.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andrew Davis
	<afd@...com>
Subject: [PATCH 12/21] power: supply: tps65090: 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/tps65090-charger.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/power/supply/tps65090-charger.c b/drivers/power/supply/tps65090-charger.c
index c59197d2aa87d..d41595764caa5 100644
--- a/drivers/power/supply/tps65090-charger.c
+++ b/drivers/power/supply/tps65090-charger.c
@@ -262,7 +262,7 @@ static int tps65090_charger_probe(struct platform_device *pdev)
 	psy_cfg.of_node			= pdev->dev.of_node;
 	psy_cfg.drv_data		= cdata;
 
-	cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc,
+	cdata->ac = devm_power_supply_register(&pdev->dev, &tps65090_charger_desc,
 			&psy_cfg);
 	if (IS_ERR(cdata->ac)) {
 		dev_err(&pdev->dev, "failed: power supply register\n");
@@ -277,7 +277,7 @@ static int tps65090_charger_probe(struct platform_device *pdev)
 	ret = tps65090_config_charger(cdata);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
-		goto fail_unregister_supply;
+		return ret;
 	}
 
 	/* Check for charger presence */
@@ -286,14 +286,14 @@ static int tps65090_charger_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__,
 			TPS65090_REG_CG_STATUS1);
-		goto fail_unregister_supply;
+		return ret;
 	}
 
 	if (status1 != 0) {
 		ret = tps65090_enable_charging(cdata);
 		if (ret < 0) {
 			dev_err(cdata->dev, "error enabling charger\n");
-			goto fail_unregister_supply;
+			return ret;
 		}
 		cdata->ac_online = 1;
 		power_supply_changed(cdata->ac);
@@ -306,7 +306,7 @@ static int tps65090_charger_probe(struct platform_device *pdev)
 			dev_err(cdata->dev,
 				"Unable to register irq %d err %d\n", irq,
 				ret);
-			goto fail_unregister_supply;
+			return ret;
 		}
 	} else {
 		cdata->poll_task = kthread_run(tps65090_charger_poll_task,
@@ -316,16 +316,11 @@ static int tps65090_charger_probe(struct platform_device *pdev)
 			ret = PTR_ERR(cdata->poll_task);
 			dev_err(cdata->dev,
 				"Unable to run kthread err %d\n", ret);
-			goto fail_unregister_supply;
+			return ret;
 		}
 	}
 
 	return 0;
-
-fail_unregister_supply:
-	power_supply_unregister(cdata->ac);
-
-	return ret;
 }
 
 static void tps65090_charger_remove(struct platform_device *pdev)
@@ -334,7 +329,6 @@ static void tps65090_charger_remove(struct platform_device *pdev)
 
 	if (cdata->irq == -ENXIO)
 		kthread_stop(cdata->poll_task);
-	power_supply_unregister(cdata->ac);
 }
 
 static const struct of_device_id of_tps65090_charger_match[] = {
-- 
2.39.2