linux-kernel - [PATCH 11/27] rtc: rtc-m41t80: use devm

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Date:	Mon, 01 Apr 2013 18:45:47 +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 11/27] rtc: rtc-m41t80: use devm_*() functions

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

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/rtc/rtc-m41t80.c |   16 +++++-----------
 1 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index b885bcd..89674b5 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -637,7 +637,8 @@ static int m41t80_probe(struct i2c_client *client,
 	dev_info(&client->dev,
 		 "chip found, driver version " DRV_VERSION "\n");
 
-	clientdata = kzalloc(sizeof(*clientdata), GFP_KERNEL);
+	clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata),
+				GFP_KERNEL);
 	if (!clientdata) {
 		rc = -ENOMEM;
 		goto exit;
@@ -646,8 +647,8 @@ static int m41t80_probe(struct i2c_client *client,
 	clientdata->features = id->driver_data;
 	i2c_set_clientdata(client, clientdata);
 
-	rtc = rtc_device_register(client->name, &client->dev,
-				  &m41t80_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&client->dev, client->name,
+					&m41t80_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		rc = PTR_ERR(rtc);
 		rtc = NULL;
@@ -718,26 +719,19 @@ ht_err:
 	goto exit;
 
 exit:
-	if (rtc)
-		rtc_device_unregister(rtc);
-	kfree(clientdata);
 	return rc;
 }
 
 static int m41t80_remove(struct i2c_client *client)
 {
+#ifdef CONFIG_RTC_DRV_M41T80_WDT
 	struct m41t80_data *clientdata = i2c_get_clientdata(client);
-	struct rtc_device *rtc = clientdata->rtc;
 
-#ifdef CONFIG_RTC_DRV_M41T80_WDT
 	if (clientdata->features & M41T80_FEATURE_HT) {
 		misc_deregister(&wdt_dev);
 		unregister_reboot_notifier(&wdt_notifier);
 	}
 #endif
-	if (rtc)
-		rtc_device_unregister(rtc);
-	kfree(clientdata);
 
 	return 0;
 }
-- 
1.7.2.5


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