linux-kernel - Re: [PATCH v2 2/4] Input: omap4-keypad - Fix handling of platform_get

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Message-ID: <20200916005359.GE1681290@dtor-ws>
Date:   Tue, 15 Sep 2020 17:53:59 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/4] Input: omap4-keypad - Fix handling of
 platform_get_irq() error

On Fri, Aug 28, 2020 at 04:57:42PM +0200, Krzysztof Kozlowski wrote:
> platform_get_irq() returns -ERRNO on error.  In such case comparison
> to 0 would pass the check.
> 
> Fixes: f3a1ba60dbdb ("Input: omap4-keypad - use platform device helpers")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> 
> ---
> 
> Changes since v1:
> 1. None
> ---
>  drivers/input/keyboard/omap4-keypad.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
> index 94c94d7f5155..b075f1af0305 100644
> --- a/drivers/input/keyboard/omap4-keypad.c
> +++ b/drivers/input/keyboard/omap4-keypad.c
> @@ -240,10 +240,8 @@ static int omap4_keypad_probe(struct platform_device *pdev)
>  	}
>  
>  	irq = platform_get_irq(pdev, 0);
> -	if (!irq) {
> -		dev_err(&pdev->dev, "no keyboard irq assigned\n");
> -		return -EINVAL;
> -	}
> +	if (irq < 0)
> +		return -irq;

You must have meant just "irq", right?

>  
>  	keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
>  	if (!keypad_data) {
> -- 
> 2.17.1
> 

-- 
Dmitry