linux-kernel - Re: [PATCH v3 07/13] thermal: qoriq: Pass data to qoriq_tmu

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Date:   Thu, 4 Apr 2019 10:11:57 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Andrey Smirnov <andrew.smirnov@...il.com>, linux-pm@...r.kernel.org
Cc:     Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Angus Ainslie <angus@...ea.ca>, linux-imx@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 07/13] thermal: qoriq: Pass data to
 qoriq_tmu_calibration() directly

On 01/04/2019 06:14, Andrey Smirnov wrote:
> We can simplify error cleanup code if instead of passing a "struct
> platform_device *" to qoriq_tmu_calibration() and deriving a bunch of
> pointers from it, we pass those pointers directly. This way we won't
> be force to call platform_set_drvdata() as early in qoriq_tmu_probe()
> and consequently would be able to drop the "err_iomap" error path.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> Cc: Chris Healy <cphealy@...il.com>
> Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: Eduardo Valentin <edubezval@...il.com>
> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> Cc: Angus Ainslie (Purism) <angus@...ea.ca>
> Cc: linux-imx@....com
> Cc: linux-pm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  drivers/thermal/qoriq_thermal.c | 22 +++++++++-------------
>  1 file changed, 9 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
> index 24a2a57f61c9..a3ddb55740e4 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -139,16 +139,16 @@ static int qoriq_tmu_register_tmu_zone(struct device *dev,
>  	return 0;
>  }
>  
> -static int qoriq_tmu_calibration(struct platform_device *pdev)
> +static int qoriq_tmu_calibration(struct device *dev,
> +				 struct qoriq_tmu_data *data)
>  {
>  	int i, val, len;
>  	u32 range[4];
>  	const u32 *calibration;
> -	struct device_node *np = pdev->dev.of_node;
> -	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
> +	struct device_node *np = dev->of_node;
>  
>  	if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
> -		dev_err(&pdev->dev, "missing calibration range.\n");
> +		dev_err(dev, "missing calibration range.\n");
>  		return -ENODEV;
>  	}
>  
> @@ -160,7 +160,7 @@ static int qoriq_tmu_calibration(struct platform_device *pdev)
>  
>  	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
>  	if (calibration == NULL || len % 8) {
> -		dev_err(&pdev->dev, "invalid calibration data.\n");
> +		dev_err(dev, "invalid calibration data.\n");
>  		return -ENODEV;
>  	}
>  
> @@ -198,20 +198,17 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
>  	if (!data)
>  		return -ENOMEM;
>  
> -	platform_set_drvdata(pdev, data);
> -
>  	data->little_endian = of_property_read_bool(np, "little-endian");
>  
>  	data->regs = of_iomap(np, 0);
>  	if (!data->regs) {
>  		dev_err(dev, "Failed to get memory region\n");
> -		ret = -ENODEV;
> -		goto err_iomap;
> +		return -ENODEV;
>  	}
>  
>  	qoriq_tmu_init_device(data);	/* TMU initialization */
>  
> -	ret = qoriq_tmu_calibration(pdev);	/* TMU calibration */
> +	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
>  	if (ret < 0)
>  		goto err_tmu;
>  
> @@ -222,14 +219,13 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
>  		goto err_iomap;

s/goto err_iomap/goto err_tmu/ ?

>  	}
>  
> +	platform_set_drvdata(pdev, data);
> +
>  	return 0;
>  
>  err_tmu:
>  	iounmap(data->regs);
>  
> -err_iomap:
> -	platform_set_drvdata(pdev, NULL);
> -
>  	return ret;
>  }
>  
> 


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