linux-kernel - [PATCH] fix ptr

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Date:   Fri, 17 Mar 2017 22:48:09 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Olimpiu Dejeu <olimpiu@...ticsand.com>
Cc:     kbuild-all@...org, robh@...nel.org, lee.jones@...aro.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        devicetree@...r.kernel.org, jingoohan1@...il.com,
        bdodge@...ticsand.com, joe@...ches.com, medasaro@...ticsand.com,
        daniel.thompson@...aro.org, Olimpiu Dejeu <olimpiu@...ticsand.com>
Subject: [PATCH] fix ptr_ret.cocci warnings

drivers/video/backlight/arcxcnn_bl.c:183:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: Olimpiu Dejeu <olimpiu@...ticsand.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

 arcxcnn_bl.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/video/backlight/arcxcnn_bl.c
+++ b/drivers/video/backlight/arcxcnn_bl.c
@@ -180,10 +180,7 @@ static int arcxcnn_backlight_register(st
 
 	lp->bl = devm_backlight_device_register(lp->dev, name, lp->dev, lp,
 				       &arcxcnn_bl_ops, props);
-	if (IS_ERR(lp->bl))
-		return PTR_ERR(lp->bl);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(lp->bl);
 }
 
 static void arcxcnn_parse_dt(struct arcxcnn *lp)