linux-kernel - [PATCH usb v4 2/2] host: ehci-sead3: fix NULL pointer dereference on resource

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Message-Id: <1415065631-6010-3-git-send-email-varkabhadram@gmail.com>
Date:	Tue,  4 Nov 2014 07:17:11 +0530
From:	varkabhadram@...il.com
To:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org
Cc:	balbi@...com, stern@...land.harvard.edu,
	sergei.shtylyov@...entembedded.com, linux-kernel@...r.kernel.org,
	Varka Bhadram <varkabhadram@...il.com>,
	Varka Bhadram <varkab@...c.in>
Subject: [PATCH usb v4 2/2] host: ehci-sead3: fix NULL pointer dereference on resource

From: Varka Bhadram <varkabhadram@...il.com>

Fix on accessing NULL pointer dereference on get resource failed.

Signed-off-by: Varka Bhadram <varkab@...c.in>
Acked-by: Alan Stern <stern@...land.harvard.edu>
---
 drivers/usb/host/ehci-sead3.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ehci-sead3.c b/drivers/usb/host/ehci-sead3.c
index cf12676..9b6e8d0 100644
--- a/drivers/usb/host/ehci-sead3.c
+++ b/drivers/usb/host/ehci-sead3.c
@@ -110,14 +110,13 @@ static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hcd->rsrc_start = res->start;
-	hcd->rsrc_len = resource_size(res);
-
 	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(hcd->regs)) {
 		ret = PTR_ERR(hcd->regs);
 		goto err1;
 	}
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
 
 	/* Root hub has integrated TT. */
 	hcd->has_tt = 1;
-- 
1.7.9.5

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