linux-kernel - [PATCH] phy: hix5hd2-sata: Check return value of platform_get

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Message-ID: <1425283854.16106.0.camel@phoenix>
Date:	Mon, 02 Mar 2015 16:10:54 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Kishon Vijay Abraham I <kishon@...com>
Cc:	Jiancheng Xue <xuejiancheng@...wei.com>,
	Zhangfei Gao <zhangfei.gao@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] phy: hix5hd2-sata: Check return value of
 platform_get_resource

This prevent NULL pointer dereference if res is NULL.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
This patch replaces [PATCH] phy: hix5hd2-sata: Convert to use devm_ioremap_resource,
as zhangfei pinted out that the memory region is shared with sata controller so
devm_request_mem_region would fail.
 drivers/phy/phy-hix5hd2-sata.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/phy/phy-hix5hd2-sata.c b/drivers/phy/phy-hix5hd2-sata.c
index 34915b4..d6b2265 100644
--- a/drivers/phy/phy-hix5hd2-sata.c
+++ b/drivers/phy/phy-hix5hd2-sata.c
@@ -147,6 +147,9 @@ static int hix5hd2_sata_phy_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
 	priv->base = devm_ioremap(dev, res->start, resource_size(res));
 	if (!priv->base)
 		return -ENOMEM;
-- 
1.9.1



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