gpio: sifive: add missing check for platform_get_irq

Add the missing check for platform_get_irq() and return error code
if it fails.

The returned error code will be dealed with in
builtin_platform_driver(sifive_gpio_driver) and the driver will not
be registered.

Fixes: f52d6d8b43e5 ("gpio: sifive: To get gpio irq offset from device tree data")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c
index 98939cd..745e5f6 100644 (file)
--- a/drivers/gpio/gpio-sifive.c
+++ b/drivers/gpio/gpio-sifive.c
@@ -221,8 +221,12 @@ static int sifive_gpio_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
-       for (i = 0; i < ngpio; i++)
-               chip->irq_number[i] = platform_get_irq(pdev, i);
+       for (i = 0; i < ngpio; i++) {
+               ret = platform_get_irq(pdev, i);
+               if (ret < 0)
+                       return ret;
+               chip->irq_number[i] = ret;
+       }
 
        ret = bgpio_init(&chip->gc, dev, 4,
                         chip->base + SIFIVE_GPIO_INPUT_VAL,