linux-kernel - [PATCH -next] clocksource: keystone: Fix return value check in keystone_timer

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Message-ID: <CAPgLHd-XC6xeUxQJBNe=grLvZUxSc_bcrEVo=Tc1jbyGmHjdgw@mail.gmail.com>
Date:	Thu, 16 Jan 2014 16:29:00 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	daniel.lezcano@...aro.org, tglx@...utronix.de
Cc:	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org
Subject: [PATCH -next] clocksource: keystone: Fix return value check in keystone_timer_init()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

In case of error, function of_clk_get() returns ERR_PTR()
and never returns NULL. The NULL test in the return value
check should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/clocksource/timer-keystone.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-keystone.c b/drivers/clocksource/timer-keystone.c
index cbac8d0..4ca05ec 100644
--- a/drivers/clocksource/timer-keystone.c
+++ b/drivers/clocksource/timer-keystone.c
@@ -168,7 +168,7 @@ static void __init keystone_timer_init(struct device_node *np)
 	}
 
 	clk = of_clk_get(np, 0);
-	if (!clk) {
+	if (IS_ERR(clk)) {
 		pr_err("%s: failed to get clock\n", __func__);
 		iounmap(timer.base);
 		return;

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