From 4928241698e168794448e49c5d114f1534c46d39 Mon Sep 17 00:00:00 2001 From: Miaoqian Lin Date: Fri, 14 Jan 2022 06:48:20 +0000 Subject: [PATCH] gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe commit 0b39536cc699db6850c426db7f9cb45923de40c5 upstream. 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 Reviewed-by: Linus Walleij Signed-off-by: Bartosz Golaszewski Signed-off-by: Greg Kroah-Hartman --- 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,