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>
mariux64 · Mar 30, 2016 · 8d8ee18 · 8d8ee18
1 parent fd975a7
commit 8d8ee18
Showing 1 changed file with 5 additions and 0 deletions.
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) {