From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Date: Fri, 7 Dec 2012 22:44:46 +0000 (-0700)
Subject: watchdog: Orion: Fix possible null-deference in orion_wdt_probe
X-Git-Tag: v3.8-rc1~1^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8c4c419ca3bd5a5b3389114e037a9d17bdec3a5f;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

watchdog: Orion: Fix possible null-deference in orion_wdt_probe

If the DT does not include a regs parameter then the null res
would be dereferenced.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---

diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 0478b00..7c18b3b 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -156,6 +156,8 @@ static int orion_wdt_probe(struct platform_device *pdev)
 	wdt_tclk = clk_get_rate(clk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
 	wdt_reg = devm_ioremap(&pdev->dev, res->start, resource_size(res));
 	if (!wdt_reg)
 		return -ENOMEM;