linux-kernel - [PATCH -next] ARM: pxa: fix return value check in em_x270_sensor

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Message-ID: <CAPgLHd_SQbatw9n57n-FPT1O3j4s_8YonjO8RwWCUscroh5jcw@mail.gmail.com>
Date:	Sat, 14 Dec 2013 12:43:11 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	eric.y.miao@...il.com, linux@....linux.org.uk,
	haojian.zhuang@...il.com
Cc:	yongjun_wei@...ndmicro.com.cn,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH -next] ARM: pxa: fix return value check in em_x270_sensor_init()

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

In case of error, the function regulator_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>
---
 arch/arm/mach-pxa/em-x270.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 6915a9f..339b422 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -971,9 +971,9 @@ static int em_x270_sensor_init(void)
 	gpio_direction_output(cam_reset, 0);
 
 	em_x270_camera_ldo = regulator_get(NULL, "vcc cam");
-	if (em_x270_camera_ldo == NULL) {
+	if (IS_ERR(em_x270_camera_ldo)) {
 		gpio_free(cam_reset);
-		return -ENODEV;
+		return PTR_ERR(em_x270_camera_ldo);
 	}
 
 	ret = regulator_enable(em_x270_camera_ldo);

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