gpio: xgene: Prevent NULL pointer dereference

AxelLin · linusw · commit 8d8ee18cc707 · 2016-03-30T10:39:39.000+02:00
platform_get_resource() can return NULL, thus add NULL test to prevent NULL
pointer dereference.

Signed-off-by: Axel Lin &lt;axel.lin@ingics.com&gt;
Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
diff --git 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) {
