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From: Miaoqian Lin <linmq006@gmail.com>
To: Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <brgl@bgdev.pl>,
	Ran Wang <ran.wang_1@nxp.com>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe
Date: Fri, 14 Jan 2022 06:48:20 +0000	[thread overview]
Message-ID: <20220114064821.20200-1-linmq006@gmail.com> (raw)

platform_get_irq() returns negative error number instead 0 on failure.
And the doc of platform_get_irq() provides a usage example:

    int irq = platform_get_irq(pdev, 0);
    if (irq < 0)
        return irq;

Fix the check of return value to catch errors correctly.

Fixes: 76c47d1449fc ("gpio: mpc8xxx: Add ACPI support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/gpio/gpio-mpc8xxx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 70d6ae20b1da..01634c8d27b3 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -388,8 +388,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	}
 
 	mpc8xxx_gc->irqn = platform_get_irq(pdev, 0);
-	if (!mpc8xxx_gc->irqn)
-		return 0;
+	if (mpc8xxx_gc->irqn < 0)
+		return mpc8xxx_gc->irqn;
 
 	mpc8xxx_gc->irq = irq_domain_create_linear(fwnode,
 						   MPC8XXX_GPIO_PINS,
-- 
2.17.1


             reply	other threads:[~2022-01-14  6:48 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-14  6:48 Miaoqian Lin [this message]
2022-01-16 12:06 ` [PATCH] gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe Linus Walleij
2022-01-17 13:19 ` Bartosz Golaszewski

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