From 8d8ee18cc707f498b6dad18915576f23b00bcff8 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Mon, 21 Mar 2016 20:03:50 +0800
Subject: [PATCH] gpio: xgene: Prevent NULL pointer dereference
platform_get_resource() can return NULL, thus add NULL test to prevent NULL
pointer dereference.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/gpio-xgene.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c
index c0aa387664bf5..0dc916191689e 100644
--- a/drivers/gpio/gpio-xgene.c
+++ b/drivers/gpio/gpio-xgene.c
@@ -173,6 +173,11 @@ static int xgene_gpio_probe(struct platform_device *pdev)
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ err = -EINVAL;
+ goto err;
+ }
+
gpio->base = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (!gpio->base) {
--
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