linux-kernel - [PATCH v2] rtc: pl030: Use devm_kzalloc() instead of kmalloc()

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Date:	Wed, 09 Oct 2013 14:28:51 +0900
From:	Sangjung Woo <sangjung.woo@...sung.com>
To:	Joe Perches <joe@...ches.com>,
	Alessandro Rubini <rubini@...dd.com>,
	Russell King <rmk+kernel@....linux.org.uk>
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
	Sangjung Woo <sangjung.woo@...sung.com>
Subject: [PATCH v2] rtc: pl030: Use devm_kzalloc() instead of kmalloc()

In order to be free automatically and make the cleanup paths more
simple, use devm_kzalloc() instead of kmalloc().

Signed-off-by: Sangjung Woo <sangjung.woo@...sung.com>
---
 drivers/rtc/rtc-pl030.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
index 22bacdb..ecd57c6 100644
--- a/drivers/rtc/rtc-pl030.c
+++ b/drivers/rtc/rtc-pl030.c
@@ -106,7 +106,7 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
 	if (ret)
 		goto err_req;
 
-	rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
+	rtc = devm_kzalloc(&dev->dev, sizeof(*rtc), GFP_KERNEL);
 	if (!rtc) {
 		ret = -ENOMEM;
 		goto err_rtc;
@@ -115,7 +115,7 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
 	rtc->base = ioremap(dev->res.start, resource_size(&dev->res));
 	if (!rtc->base) {
 		ret = -ENOMEM;
-		goto err_map;
+		goto err_rtc;
 	}
 
 	__raw_writel(0, rtc->base + RTC_CR);
@@ -141,8 +141,6 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
 	free_irq(dev->irq[0], rtc);
  err_irq:
 	iounmap(rtc->base);
- err_map:
-	kfree(rtc);
  err_rtc:
 	amba_release_regions(dev);
  err_req:
@@ -160,7 +158,6 @@ static int pl030_remove(struct amba_device *dev)
 	free_irq(dev->irq[0], rtc);
 	rtc_device_unregister(rtc->rtc);
 	iounmap(rtc->base);
-	kfree(rtc);
 	amba_release_regions(dev);
 
 	return 0;
-- 
1.7.9.5

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