linux-kernel - [PATCH -next 1/2] gpio: idt3243x: Fix an ignored error return from platform_get

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Date:   Wed, 19 Jan 2022 09:04:31 +0800
From:   Yang Li <yang.lee@...ux.alibaba.com>
To:     linus.walleij@...aro.org
Cc:     brgl@...ev.pl, linmq006@...il.com, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yang Li <yang.lee@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH -next 1/2] gpio: idt3243x: Fix an ignored error return from platform_get_irq()

The return from the call to platform_get_irq() is int, it can be
a negative error code, however this is being assigned to an unsigned
int variable 'parent_irq', so making 'parent_irq' an int.

Eliminate the following coccicheck warning:
./drivers/gpio/gpio-idt3243x.c:167:6-16: WARNING: Unsigned expression
compared with zero: parent_irq < 0

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Fixes: 30fee1d7462a ("gpio: idt3243x: Fix IRQ check in idt_gpio_probe")
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
---
 drivers/gpio/gpio-idt3243x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-idt3243x.c b/drivers/gpio/gpio-idt3243x.c
index 08493b05be2d..52b8b72ded77 100644
--- a/drivers/gpio/gpio-idt3243x.c
+++ b/drivers/gpio/gpio-idt3243x.c
@@ -132,7 +132,7 @@ static int idt_gpio_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct gpio_irq_chip *girq;
 	struct idt_gpio_ctrl *ctrl;
-	unsigned int parent_irq;
+	int parent_irq;
 	int ngpios;
 	int ret;
 
-- 
2.20.1.7.g153144c