[PATCH] watchdog: ie6xx_wdt: Check for null res pointer

[Jiasheng Jiang]

The return value of platform_get_resource() needs to be checked.
To avoid use of error pointer in case of the failure of alloc.

Fixes: 101ce87b3bdd ("watchdog: Add watchdog driver for Intel Atom E6XX")
Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
---
 drivers/watchdog/ie6xx_wdt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/watchdog/ie6xx_wdt.c b/drivers/watchdog/ie6xx_wdt.c
index 8f28993fab8b..ee5b68d2e271 100644
--- a/drivers/watchdog/ie6xx_wdt.c
+++ b/drivers/watchdog/ie6xx_wdt.c
@@ -271,6 +271,9 @@ static int ie6xx_wdt_remove(struct platform_device *pdev)
 	struct resource *res;
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!res)
+		return -EINVAL;
+
 	ie6xx_wdt_stop(NULL);
 	watchdog_unregister_device(&ie6xx_wdt_dev);
 	ie6xx_wdt_debugfs_exit();
-- 
2.25.1