netdev - [PATCH] can: c_can: Fix return value check in c_can_plat

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Message-Id: <1407977939-15287-1-git-send-email-weiyj_lk@163.com>
Date:	Thu, 14 Aug 2014 08:58:59 +0800
From:	weiyj_lk@....com
To:	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Chen Gang <gang.chen@...anux.com>,
	George Cherian <george.cherian@...com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
	Pavel Machek <pavel@...x.de>, Thor Thayer <tthayer@...era.com>,
	Mugunthan V N <mugunthanvnm@...com>,
	Wolfram Sang <wsa@...g-engineering.com>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-can@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH] can: c_can: Fix return value check in c_can_plat_probe()

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

In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.

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

diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c
index 5dede6e..109cb44 100644
--- a/drivers/net/can/c_can/c_can_platform.c
+++ b/drivers/net/can/c_can/c_can_platform.c
@@ -280,7 +280,7 @@ static int c_can_plat_probe(struct platform_device *pdev)
 
 		priv->raminit_ctrlreg = devm_ioremap(&pdev->dev, res->start,
 						     resource_size(res));
-		if (IS_ERR(priv->raminit_ctrlreg) || priv->instance < 0)
+		if (!priv->raminit_ctrlreg || priv->instance < 0)
 			dev_info(&pdev->dev, "control memory is not used for raminit\n");
 		else
 			priv->raminit = c_can_hw_raminit_ti;

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