linux-kernel - Re: [PATCH] extcon: max14577: fix handling return value of regmap_irq_get

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Message-id: <566F6818.5070108@samsung.com>
Date:	Tue, 15 Dec 2015 10:08:40 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Andrzej Hajda <a.hajda@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] extcon: max14577: fix handling return value of
 regmap_irq_get_virq

On 2015년 12월 14일 19:06, Andrzej Hajda wrote:
> The function can return negative values, so its result should
> be assigned to signed variable.
> 
> The problem has been detected using proposed semantic patch
> scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].
> 
> [1]: http://permalink.gmane.org/gmane.linux.kernel/2046107
> 
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> ---
>  drivers/extcon/extcon-max14577.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
> index 601dbd9..b30ab97 100644
> --- a/drivers/extcon/extcon-max14577.c
> +++ b/drivers/extcon/extcon-max14577.c
> @@ -692,7 +692,7 @@ static int max14577_muic_probe(struct platform_device *pdev)
>  	/* Support irq domain for max14577 MUIC device */
>  	for (i = 0; i < info->muic_irqs_num; i++) {
>  		struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
> -		unsigned int virq = 0;
> +		int virq = 0;
>  
>  		virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
>  		if (virq <= 0)
> 

Applied it.

Thanks,
Chanwoo Choi
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