linux-kernel - [PATCH] driver/rtc/rtc-s3c: Fix driver clock enable/disable balance issues

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Date:	Tue,  8 Nov 2011 19:14:13 +0900
From:	jhbird.choi@...sung.com
To:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Jonghwan Choi <jhbird.choi@...sung.com>
Subject: [PATCH] driver/rtc/rtc-s3c: Fix driver clock enable/disable balance issues

From: Jonghwan Choi <jhbird.choi@...sung.com>

If an error occurs after clock is enabled, it can become unbalanced.

Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
---
 drivers/rtc/rtc-s3c.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 7639ab9..5b979d9 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -202,7 +202,6 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
 	void __iomem *base = s3c_rtc_base;
 	int year = tm->tm_year - 100;
 
-	clk_enable(rtc_clk);
 	pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
 		 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
 		 tm->tm_hour, tm->tm_min, tm->tm_sec);
@@ -214,6 +213,7 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
 		return -EINVAL;
 	}
 
+	clk_enable(rtc_clk);
 	writeb(bin2bcd(tm->tm_sec),  base + S3C2410_RTCSEC);
 	writeb(bin2bcd(tm->tm_min),  base + S3C2410_RTCMIN);
 	writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
-- 
1.7.1

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