linux-kernel - Re: [PATCH 1/2] thermal: qoriq: Use devm_add_action_or

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Date:   Thu, 12 Mar 2020 12:24:12 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Anson Huang <Anson.Huang@....com>, rui.zhang@...el.com,
        amit.kucheria@...durent.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: Re: [PATCH 1/2] thermal: qoriq: Use devm_add_action_or_reset() to
 handle all cleanups

On 11/03/2020 06:07, Anson Huang wrote:
> Use devm_add_action_or_reset() to handle all cleanups of failure in
> .probe and .remove, then .remove callback can be dropped.

Is this change compatible with the tristate?

> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  drivers/thermal/qoriq_thermal.c | 35 ++++++++++++++---------------------
>  1 file changed, 14 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
> index 874bc46..67a8d84 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -228,6 +228,14 @@ static const struct regmap_access_table qoriq_rd_table = {
>  	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges),
>  };
>  
> +static void qoriq_tmu_action(void *p)
> +{
> +	struct qoriq_tmu_data *data = p;
> +
> +	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
> +	clk_disable_unprepare(data->clk);
> +}
> +
>  static int qoriq_tmu_probe(struct platform_device *pdev)
>  {
>  	int ret;
> @@ -278,6 +286,10 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> +	ret = devm_add_action_or_reset(dev, qoriq_tmu_action, data);
> +	if (ret)
> +		return ret;
> +
>  	/* version register offset at: 0xbf8 on both v1 and v2 */
>  	ret = regmap_read(data->regmap, REGS_IPBRR(0), &ver);
>  	if (ret) {
> @@ -290,35 +302,17 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
>  
>  	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
>  	if (ret < 0)
> -		goto err;
> +		return ret;
>  
>  	ret = qoriq_tmu_register_tmu_zone(dev, data);
>  	if (ret < 0) {
>  		dev_err(dev, "Failed to register sensors\n");
> -		ret = -ENODEV;
> -		goto err;
> +		return ret;
>  	}
>  
>  	platform_set_drvdata(pdev, data);
>  
>  	return 0;
> -
> -err:
> -	clk_disable_unprepare(data->clk);
> -
> -	return ret;
> -}
> -
> -static int qoriq_tmu_remove(struct platform_device *pdev)
> -{
> -	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
> -
> -	/* Disable monitoring */
> -	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
> -
> -	clk_disable_unprepare(data->clk);
> -
> -	return 0;
>  }
>  
>  static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
> @@ -365,7 +359,6 @@ static struct platform_driver qoriq_tmu = {
>  		.of_match_table	= qoriq_tmu_match,
>  	},
>  	.probe	= qoriq_tmu_probe,
> -	.remove	= qoriq_tmu_remove,
>  };
>  module_platform_driver(qoriq_tmu);
>  
> 


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