linux-kernel - [PATCH 2/2] thermal: imx: handle error path in one place to save duplicated code

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Date:   Thu, 13 Sep 2018 17:13:06 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     rui.zhang@...el.com, edubezval@...il.com,
        daniel.lezcano@...aro.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] thermal: imx: handle error path in one place to save duplicated code

During probe phase, the error path can be handled in one place and
use goto method to save many duplicated code.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
 drivers/thermal/imx_thermal.c | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 6cfa2a8..1566154 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -762,9 +762,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
 		if (ret != -EPROBE_DEFER)
 			dev_err(&pdev->dev,
 				"failed to get thermal clk: %d\n", ret);
-		cpufreq_cooling_unregister(data->cdev);
-		cpufreq_cpu_put(data->policy);
-		return ret;
+		goto cpufreq_put;
 	}
 
 	/*
@@ -777,9 +775,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	ret = clk_prepare_enable(data->thermal_clk);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
-		cpufreq_cooling_unregister(data->cdev);
-		cpufreq_cpu_put(data->policy);
-		return ret;
+		goto cpufreq_put;
 	}
 
 	data->tz = thermal_zone_device_register("imx_thermal_zone",
@@ -792,10 +788,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
 		ret = PTR_ERR(data->tz);
 		dev_err(&pdev->dev,
 			"failed to register thermal zone device %d\n", ret);
-		clk_disable_unprepare(data->thermal_clk);
-		cpufreq_cooling_unregister(data->cdev);
-		cpufreq_cpu_put(data->policy);
-		return ret;
+		goto clk_disable;
 	}
 
 	dev_info(&pdev->dev, "%s CPU temperature grade - max:%dC"
@@ -827,14 +820,20 @@ static int imx_thermal_probe(struct platform_device *pdev)
 			0, "imx_thermal", data);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
-		clk_disable_unprepare(data->thermal_clk);
-		thermal_zone_device_unregister(data->tz);
-		cpufreq_cooling_unregister(data->cdev);
-		cpufreq_cpu_put(data->policy);
-		return ret;
+		goto thermal_zone_unregister;
 	}
 
 	return 0;
+
+thermal_zone_unregister:
+	thermal_zone_device_unregister(data->tz);
+clk_disable:
+	clk_disable_unprepare(data->thermal_clk);
+cpufreq_put:
+	cpufreq_cooling_unregister(data->cdev);
+	cpufreq_cpu_put(data->policy);
+
+	return ret;
 }
 
 static int imx_thermal_remove(struct platform_device *pdev)
-- 
2.7.4