From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Sat, 2 Dec 2017 17:01:01 +0000 (+0530)
Subject: gpio: ftgpio010: Fix platform_get_irq's error checking
X-Git-Tag: for-linus-20180210~43^2~49
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=4070a53496ec0c94fda1da0773eee2e5a5bd0084;p=linux-block.git

gpio: ftgpio010: Fix platform_get_irq's error checking

The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/gpio/gpio-ftgpio010.c b/drivers/gpio/gpio-ftgpio010.c
index 7b3394fdc624..b7a3a2db699b 100644
--- a/drivers/gpio/gpio-ftgpio010.c
+++ b/drivers/gpio/gpio-ftgpio010.c
@@ -176,8 +176,8 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 		return PTR_ERR(g->base);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq)
-		return -EINVAL;
+	if (irq <= 0)
+		return irq ? irq : -EINVAL;
 
 	ret = bgpio_init(&g->gc, dev, 4,
 			 g->base + GPIO_DATA_IN,