linux-kernel - [PATCH v2] gpio: ftgpio010: Fix platform_get

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Date:   Sat,  2 Dec 2017 22:31:01 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     linus.walleij@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: [PATCH v2] 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@...il.com>
---
changes in v2:
             It's should be 'irq <= 0' instead of 'irq < 0'.

 drivers/gpio/gpio-ftgpio010.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-ftgpio010.c b/drivers/gpio/gpio-ftgpio010.c
index 139f73d..fbb12f6 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,
-- 
2.7.4