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gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe

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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>
This commit is contained in:
Miaoqian Lin 2022-01-14 06:48:20 +00:00 committed by Greg Kroah-Hartman
parent e7525b3b9e
commit 4928241698
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpio-mpc8xxx.c
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@ -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,