linux-kernel - Re: [PATCH v10 1/2] thermal: Add thermal driver for Sunplus

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Date:   Wed, 13 Jul 2022 09:52:32 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Li-hao Kuo <lhjeff911@...il.com>, rafael@...nel.org,
        daniel.lezcano@...aro.org, amitk@...nel.org, rui.zhang@...el.com,
        robh+dt@...nel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     lh.kuo@...plus.com
Subject: Re: [PATCH v10 1/2] thermal: Add thermal driver for Sunplus

On 12/07/2022 09:30, Li-hao Kuo wrote:
> Add thermal driver for Sunplus.
> 
> Signed-off-by: Li-hao Kuo <lhjeff911@...il.com>

Thank you for your patch. There is something to discuss/improve.

_data);
> +	ret = sunplus_get_otp_temp_coef(sp_data, &pdev->dev);
> +	if (ret)
> +		return ret;
> +
> +	sp_data->pcb_tz = devm_thermal_zone_of_sensor_register(&pdev->dev,
> +							    0,
> +							    sp_data, &sp_of_thermal_ops);
> +
> +	if (IS_ERR(sp_data->pcb_tz)) {
> +		ret = PTR_ERR(sp_data->pcb_tz);
> +		dev_err(dev, "Failed to register tsensor: %d\n", ret);
> +		return ret;
> +	}
> +
> +	return ret;
> +}
> +
> +static int sunplus_thermal_remove(struct platform_device *pdev)
> +{
> +	struct sp_thermal_data *sp_data = platform_get_drvdata(pdev);
> +
> +	thermal_zone_of_sensor_unregister(&pdev->dev, sp_data->pcb_tz);

You used devm to register, so this looks wrong and will lead to double free.


Best regards,
Krzysztof