[PATCH v2] gpio: ath79: Add missing check for platform_get_irq

[Jiasheng Jiang <jiasheng@xxxxxxxxxxx>]

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

Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
---
Changelog:

v1 -> v2:

1. Return "girq->parents[0]" instead of "-ENODEV".
---
 drivers/gpio/gpio-ath79.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
index aa0a954b8392..31ce2d5c6ba0 100644
--- a/drivers/gpio/gpio-ath79.c
+++ b/drivers/gpio/gpio-ath79.c
@@ -286,6 +286,8 @@ static int ath79_gpio_probe(struct platform_device *pdev)
 		if (!girq->parents)
 			return -ENOMEM;
 		girq->parents[0] = platform_get_irq(pdev, 0);
+		if (girq->parents[0] < 0)
+			return girq->parents[0];
 		girq->default_type = IRQ_TYPE_NONE;
 		girq->handler = handle_simple_irq;
 	}
-- 
2.25.1