gpio-sta2x11: Fix potential NULL pointer dereference

devm_kzalloc can return NULL. Check for it before dereferencing.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-sta2x11.c b/drivers/gpio/gpio-sta2x11.c
index 5585425..9b55645 100644 (file)
--- a/drivers/gpio/gpio-sta2x11.c
+++ b/drivers/gpio/gpio-sta2x11.c
@@ -371,6 +371,8 @@ static int gsta_probe(struct platform_device *dev)
        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 
        chip = devm_kzalloc(&dev->dev, sizeof(*chip), GFP_KERNEL);
+       if (!chip)
+               return -ENOMEM;
        chip->dev = &dev->dev;
        chip->reg_base = devm_request_and_ioremap(&dev->dev, res);