linux-kernel - [PATCH 21/27] rtc: rtc-rp5c01: use devm

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Date:	Mon, 01 Apr 2013 18:48:58 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, 'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 21/27] rtc: rtc-rp5c01: use devm_*() functions

Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/rtc/rtc-rp5c01.c |   26 ++++++++------------------
 1 files changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c
index d25d2f6..873c689 100644
--- a/drivers/rtc/rtc-rp5c01.c
+++ b/drivers/rtc/rtc-rp5c01.c
@@ -230,15 +230,13 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
 	if (!res)
 		return -ENODEV;
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(&dev->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;
-	}
+	priv->regs = devm_ioremap(&dev->dev, res->start, resource_size(res));
+	if (!priv->regs)
+		return -ENOMEM;
 
 	sysfs_bin_attr_init(&priv->nvram_attr);
 	priv->nvram_attr.attr.name = "nvram";
@@ -251,27 +249,22 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
 
 	platform_set_drvdata(dev, priv);
 
-	rtc = rtc_device_register("rtc-rp5c01", &dev->dev, &rp5c01_rtc_ops,
+	rtc = devm_rtc_device_register(&dev->dev, "rtc-rp5c01", &rp5c01_rtc_ops,
 				  THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		error = PTR_ERR(rtc);
-		goto out_unmap;
+		goto out;
 	}
 	priv->rtc = rtc;
 
 	error = sysfs_create_bin_file(&dev->dev.kobj, &priv->nvram_attr);
 	if (error)
-		goto out_unregister;
+		goto out;
 
 	return 0;
 
-out_unregister:
-	rtc_device_unregister(rtc);
-out_unmap:
+out:
 	platform_set_drvdata(dev, NULL);
-	iounmap(priv->regs);
-out_free_priv:
-	kfree(priv);
 	return error;
 }
 
@@ -280,9 +273,6 @@ static int __exit rp5c01_rtc_remove(struct platform_device *dev)
 	struct rp5c01_priv *priv = platform_get_drvdata(dev);
 
 	sysfs_remove_bin_file(&dev->dev.kobj, &priv->nvram_attr);
-	rtc_device_unregister(priv->rtc);
-	iounmap(priv->regs);
-	kfree(priv);
 	return 0;
 }
 
-- 
1.7.2.5


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