linux-kernel - [PATCH 1/2] thermal: qoriq: Use devm_add_action_or

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Date:   Wed, 11 Mar 2020 13:07:31 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     rui.zhang@...el.com, daniel.lezcano@...aro.org,
        amit.kucheria@...durent.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH 1/2] thermal: qoriq: Use devm_add_action_or_reset() to handle all cleanups

Use devm_add_action_or_reset() to handle all cleanups of failure in
.probe and .remove, then .remove callback can be dropped.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
 drivers/thermal/qoriq_thermal.c | 35 ++++++++++++++---------------------
 1 file changed, 14 insertions(+), 21 deletions(-)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 874bc46..67a8d84 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -228,6 +228,14 @@ static const struct regmap_access_table qoriq_rd_table = {
 	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges),
 };
 
+static void qoriq_tmu_action(void *p)
+{
+	struct qoriq_tmu_data *data = p;
+
+	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
+	clk_disable_unprepare(data->clk);
+}
+
 static int qoriq_tmu_probe(struct platform_device *pdev)
 {
 	int ret;
@@ -278,6 +286,10 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = devm_add_action_or_reset(dev, qoriq_tmu_action, data);
+	if (ret)
+		return ret;
+
 	/* version register offset at: 0xbf8 on both v1 and v2 */
 	ret = regmap_read(data->regmap, REGS_IPBRR(0), &ver);
 	if (ret) {
@@ -290,35 +302,17 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
 
 	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
 	if (ret < 0)
-		goto err;
+		return ret;
 
 	ret = qoriq_tmu_register_tmu_zone(dev, data);
 	if (ret < 0) {
 		dev_err(dev, "Failed to register sensors\n");
-		ret = -ENODEV;
-		goto err;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, data);
 
 	return 0;
-
-err:
-	clk_disable_unprepare(data->clk);
-
-	return ret;
-}
-
-static int qoriq_tmu_remove(struct platform_device *pdev)
-{
-	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
-
-	/* Disable monitoring */
-	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
-
-	clk_disable_unprepare(data->clk);
-
-	return 0;
 }
 
 static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
@@ -365,7 +359,6 @@ static struct platform_driver qoriq_tmu = {
 		.of_match_table	= qoriq_tmu_match,
 	},
 	.probe	= qoriq_tmu_probe,
-	.remove	= qoriq_tmu_remove,
 };
 module_platform_driver(qoriq_tmu);
 
-- 
2.7.4