[PATCH][next] gpio: loongson-64bit: Fix a less than zero check on an unsigned int struct field

[Colin Ian King <colin.i.king@gmail.com>]

Currently the error check from the call to platform_get_irq is always
false because an unsigned int chip->irq.parents[i] is being used to
to perform the less than zero error check. Fix this by using the int
variable ret to perform the check.

Fixes: 03c146cb6cd1 ("gpio: loongson-64bit: Add support for Loongson-2K0300 SoC")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 drivers/gpio/gpio-loongson-64bit.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-loongson-64bit.c b/drivers/gpio/gpio-loongson-64bit.c
index f84f8c537249..24b7219db34a 100644
--- a/drivers/gpio/gpio-loongson-64bit.c
+++ b/drivers/gpio/gpio-loongson-64bit.c
@@ -267,10 +267,13 @@ static int loongson_gpio_init_irqchip(struct platform_device *pdev,
 		return -ENOMEM;
 
 	for (i = 0; i < data->intr_num; i++) {
-		chip->irq.parents[i] = platform_get_irq(pdev, i);
-		if (chip->irq.parents[i] < 0)
-			return dev_err_probe(&pdev->dev, chip->irq.parents[i],
+		int ret;
+
+		ret = platform_get_irq(pdev, i);
+		if (ret < 0)
+			return dev_err_probe(&pdev->dev, ret,
 					     "failed to get IRQ %d\n", i);
+		chip->irq.parents[i] = ret;
 	}
 
 	for (i = 0; i < data->intr_num; i++) {
-- 
2.51.0