linux-kernel - Re: [PATCH 15/18] thermal: exynos: check return values of ->get_trip

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Message-ID: <20180501104304.GL27619@mai>
Date:   Tue, 1 May 2018 12:43:04 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     Eduardo Valentin <edubezval@...il.com>,
        Zhang Rui <rui.zhang@...el.com>,
        linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/18] thermal: exynos: check return values of
 ->get_trip_[temp,hyst] methods

On Thu, Apr 26, 2018 at 01:51:30PM +0200, Bartlomiej Zolnierkiewicz wrote:
> Check return values of ->get_trip_[temp,hyst] methods in
> exynos_tmu_initialize().
> 
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> ---
>  drivers/thermal/samsung/exynos_tmu.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index 244aaf6..abe0737 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -357,19 +357,23 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
>  		/* Write temperature code for rising and falling threshold */
>  		for (i = 0; i < ntrips; i++) {
>  			/* Write temperature code for rising threshold */
> -			tzd->ops->get_trip_temp(tzd, i, &temp);
> +			ret = tzd->ops->get_trip_temp(tzd, i, &temp);
> +			if (ret)
> +				goto err;
>  			temp /= MCELSIUS;
>  			data->tmu_set_trip_temp(data, i, temp);
>  
>  			/* Write temperature code for falling threshold */
> -			tzd->ops->get_trip_hyst(tzd, i, &hyst);
> +			ret = tzd->ops->get_trip_hyst(tzd, i, &hyst);
> +			if (ret)
> +				goto err;

Could this fail for 4210 ?

>  			hyst /= MCELSIUS;
>  			data->tmu_set_trip_hyst(data, i, temp, hyst);
>  		}
>  
>  		data->tmu_clear_irqs(data);
>  	}
> -
> +err:
>  	clk_disable(data->clk);
>  	mutex_unlock(&data->lock);
>  	if (!IS_ERR(data->clk_sec))
> -- 
> 1.9.1
> 

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