linux-kernel - [PATCH] phy: fix return value check in armada375_usb_phy

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Date:	Wed, 14 Jan 2015 09:10:00 +0800
From:	weiyj_lk@....com
To:	Kishon Vijay Abraham I <kishon@...com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] phy: fix return value check in armada375_usb_phy_probe()

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

In case of error, the function devm_ioremap_resource() 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/phy/phy-armada375-usb2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/phy-armada375-usb2.c b/drivers/phy/phy-armada375-usb2.c
index ac7d99d..7c99ca2 100644
--- a/drivers/phy/phy-armada375-usb2.c
+++ b/drivers/phy/phy-armada375-usb2.c
@@ -118,8 +118,8 @@ static int armada375_usb_phy_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	usb_cluster_base = devm_ioremap_resource(&pdev->dev, res);
-	if (!usb_cluster_base)
-		return -ENOMEM;
+	if (IS_ERR(usb_cluster_base))
+		return PTR_ERR(usb_cluster_base);
 
 	phy = devm_phy_create(dev, NULL, &armada375_usb_phy_ops);
 	if (IS_ERR(phy)) {

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