gpio: brcmstb: check return value of gpiochip_irqchip_add()

Because gpiochip_irqchip_add() may fail, its return value should
be checked.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index 73f2c3be4657f47e562268618771c4a77143f380..dd0308cc8bb0be09ad015a88521a1f2bfd409132 100644 (file)
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -339,6 +339,7 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
        struct brcmstb_gpio_priv *priv = bank->parent_priv;
        struct device *dev = &pdev->dev;
        struct device_node *np = dev->of_node;
+       int err;
 
        bank->irq_chip.name = dev_name(dev);
        bank->irq_chip.irq_mask = brcmstb_gpio_irq_mask;
@@ -355,8 +356,6 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
                        dev_warn(dev,
                                "Couldn't get wake IRQ - GPIOs will not be able to wake from sleep");
                } else {
-                       int err;
-
                        /*
                         * Set wakeup capability before requesting wakeup
                         * interrupt, so we can process boot-time "wakeups"
@@ -383,8 +382,10 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
        if (priv->can_wake)
                bank->irq_chip.irq_set_wake = brcmstb_gpio_irq_set_wake;
 
-       gpiochip_irqchip_add(&bank->gc, &bank->irq_chip, 0,
-                       handle_simple_irq, IRQ_TYPE_NONE);
+       err = gpiochip_irqchip_add(&bank->gc, &bank->irq_chip, 0,
+                                  handle_simple_irq, IRQ_TYPE_NONE);
+       if (err)
+               return err;
        gpiochip_set_chained_irqchip(&bank->gc, &bank->irq_chip,
                        priv->parent_irq, brcmstb_gpio_irq_handler);