linux-kernel - Re: [PATCH v6 6/9] rtc: max8997: Check for ERRNO of regmap_irq_get

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Message-ID: <20160507064845.GD2890@piout.net>
Date:	Sat, 7 May 2016 08:48:45 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Kukjin Kim <kgene@...nel.org>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Lee Jones <lee.jones@...aro.org>,
	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, linux-leds@...r.kernel.org,
	linux-pm@...r.kernel.org, rtc-linux@...glegroups.com,
	r.baldyga@...kerion.com,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v6 6/9] rtc: max8997: Check for ERRNO of
 regmap_irq_get_virq()

On 06/05/2016 at 09:27:13 +0200, Krzysztof Kozlowski wrote :
> The regmap_irq_get_virq() can return zero or negative ERRNO, so it is
> insufficient to check only for non-zero value.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>

> ---
>  drivers/rtc/rtc-max8997.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c
> index 4998aee0f07f..1a06e17ebe9b 100644
> --- a/drivers/rtc/rtc-max8997.c
> +++ b/drivers/rtc/rtc-max8997.c
> @@ -497,7 +497,7 @@ static int max8997_rtc_probe(struct platform_device *pdev)
>  	}
>  
>  	virq = regmap_irq_get_virq(max8997->irq_data, MAX8997_PMICIRQ_RTCA1);
> -	if (!virq) {
> +	if (virq <= 0) {
>  		dev_err(&pdev->dev, "Failed to create mapping alarm IRQ\n");
>  		ret = -ENXIO;
>  		goto err_out;
> -- 
> 1.9.1
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com