linux-kernel - [PATCH] drm/msm: fix return value check in ERR

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Message-ID: <CAPgLHd-Qzopm8EmcFOAnHk_UAks9FTFKnaS_4Xd3jnzPOtLChQ@mail.gmail.com>
Date:	Wed, 11 Sep 2013 06:56:12 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	airlied@...ux.ie, robdclark@...il.com
Cc:	yongjun_wei@...ndmicro.com.cn, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/msm: fix return value check in ERR_PTR()

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

In case of error, the function drm_prime_pages_to_sg() 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/gpu/drm/msm/msm_gem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 6b5a6c8..3462def 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -40,9 +40,9 @@ static struct page **get_pages(struct drm_gem_object *obj)
 		}
 
 		msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
-		if (!msm_obj->sgt) {
+		if (IS_ERR(msm_obj->sgt)) {
 			dev_err(dev->dev, "failed to allocate sgt\n");
-			return ERR_PTR(-ENOMEM);
+			return ERR_CAST(msm_obj->sgt);
 		}
 
 		msm_obj->pages = p;

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