diff mbox series

[5.16,0964/1039] gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe

Message ID 20220124184157.689790247@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Jan. 24, 2022, 6:45 p.m. UTC 
From: Miaoqian Lin <linmq006@gmail.com>

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 <linmq006@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpio/gpio-mpc8xxx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -388,8 +388,8 @@  static int mpc8xxx_probe(struct platform
 	}
 
 	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,