rtc: rtc-msm6242: use devm_*() functions

Use devm_*() functions to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-msm6242.c

@@ -194,30 +194,28 @@ static const struct rtc_class_ops msm6242_rtc_ops = {
 	.set_time	= msm6242_set_time,
 };
 
-static int __init msm6242_rtc_probe(struct platform_device *dev)
+static int __init msm6242_rtc_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct msm6242_priv *priv;
 	struct rtc_device *rtc;
 	int error;
 
-	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)
 		return -ENODEV;
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->regs = ioremap(res->start, resource_size(res));
-	if (!priv->regs) {
-		error = -ENOMEM;
-		goto out_free_priv;
-	}
-	platform_set_drvdata(dev, priv);
+	priv->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!priv->regs)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, priv);
 
-	rtc = rtc_device_register("rtc-msm6242", &dev->dev, &msm6242_rtc_ops,
-				  THIS_MODULE);
+	rtc = devm_rtc_device_register(&pdev->dev, "rtc-msm6242",
+				&msm6242_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		error = PTR_ERR(rtc);
 		goto out_unmap;
@@ -227,20 +225,12 @@ static int __init msm6242_rtc_probe(struct platform_device *dev)
 	return 0;
 
 out_unmap:
-	platform_set_drvdata(dev, NULL);
-	iounmap(priv->regs);
-out_free_priv:
-	kfree(priv);
+	platform_set_drvdata(pdev, NULL);
 	return error;
 }
 
-static int __exit msm6242_rtc_remove(struct platform_device *dev)
+static int __exit msm6242_rtc_remove(struct platform_device *pdev)
 {
-	struct msm6242_priv *priv = platform_get_drvdata(dev);
-
-	rtc_device_unregister(priv->rtc);
-	iounmap(priv->regs);
-	kfree(priv);
 	return 0;
 }