linux-kernel - [PATCH] staging: drm/imx: fix return value check in imx_drm

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Message-ID: <CAPgLHd8m+fq1WDdxkoVPRRDGBDD8ExVz8Nj9Z6W+DjQehp1YZA@mail.gmail.com>
Date:	Fri, 25 Oct 2013 17:07:18 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	gregkh@...uxfoundation.org, s.hauer@...gutronix.de,
	airlied@...hat.com, daniel.vetter@...ll.ch, p.zabel@...gutronix.de
Cc:	yongjun_wei@...ndmicro.com.cn, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: drm/imx: fix return value check in imx_drm_init()

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

In case of error, the function platform_device_register_simple() 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/staging/imx-drm/imx-drm-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index a2e52a0..835a1b1 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -837,8 +837,8 @@ static int __init imx_drm_init(void)
 	INIT_LIST_HEAD(&imx_drm_device->encoder_list);
 
 	imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
-	if (!imx_drm_pdev) {
-		ret = -EINVAL;
+	if (IS_ERR(imx_drm_pdev)) {
+		ret = PTR_ERR(imx_drm_pdev);
 		goto err_pdev;
 	}
 

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