linux-kernel - Re: [PATCH] iio: adc: twl6030-gpadc: Use devm

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Message-ID: <52126ED5.3040702@kernel.org>
Date:	Mon, 19 Aug 2013 20:15:33 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Oleksandr Kozaruk <oleksandr.kozaruk@...com>
CC:	jic23@....ac.uk, gg@...mlogic.co.uk, balajitk@...com,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: adc: twl6030-gpadc: Use devm_* API family

On 08/19/13 12:09, Oleksandr Kozaruk wrote:
> Using devm_iio_device_alloc and devm_request_threaded_irq makes
> code simpler.
> 
> Signed-off-by: Oleksandr Kozaruk <oleksandr.kozaruk@...com>
Applied to the togreg branch of iio.git

Thanks,

Jonathan
> ---
>  drivers/iio/adc/twl6030-gpadc.c | 36 ++++++++++--------------------------
>  1 file changed, 10 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
> index a80a049..a558516 100644
> --- a/drivers/iio/adc/twl6030-gpadc.c
> +++ b/drivers/iio/adc/twl6030-gpadc.c
> @@ -893,11 +893,9 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
>  
>  	pdata = match->data;
>  
> -	indio_dev = iio_device_alloc(sizeof(*gpadc));
> -	if (!indio_dev) {
> -		dev_err(dev, "failed allocating iio device\n");
> -		ret = -ENOMEM;
> -	}
> +	indio_dev = devm_iio_device_alloc(dev, sizeof(*gpadc));
> +	if (!indio_dev)
> +		return -ENOMEM;
>  
>  	gpadc = iio_priv(indio_dev);
>  
> @@ -905,7 +903,7 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
>  					sizeof(*gpadc->twl6030_cal_tbl) *
>  					pdata->nchannels, GFP_KERNEL);
>  	if (!gpadc->twl6030_cal_tbl)
> -		goto err_free_device;
> +		return -ENOMEM;
>  
>  	gpadc->dev = dev;
>  	gpadc->pdata = pdata;
> @@ -917,33 +915,30 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
>  	ret = pdata->calibrate(gpadc);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to read calibration registers\n");
> -		goto err_free_device;
> +		return ret;
>  	}
>  
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0) {
>  		dev_err(&pdev->dev, "failed to get irq\n");
> -		goto err_free_device;
> +		return irq;
>  	}
>  
> -	ret = request_threaded_irq(irq, NULL, twl6030_gpadc_irq_handler,
> +	ret = devm_request_threaded_irq(dev, irq, NULL,
> +				twl6030_gpadc_irq_handler,
>  				IRQF_ONESHOT, "twl6030_gpadc", indio_dev);
> -	if (ret) {
> -		dev_dbg(&pdev->dev, "could not request irq\n");
> -		goto err_free_device;
> -	}
>  
>  	ret = twl6030_gpadc_enable_irq(TWL6030_GPADC_RT_SW1_EOC_MASK);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to enable GPADC interrupt\n");
> -		goto err_free_irq;
> +		return ret;
>  	}
>  
>  	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, TWL6030_GPADCS,
>  					TWL6030_REG_TOGGLE1);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to enable GPADC module\n");
> -		goto err_free_irq;
> +		return ret;
>  	}
>  
>  	indio_dev->name = DRIVER_NAME;
> @@ -954,15 +949,6 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
>  	indio_dev->num_channels = pdata->nchannels;
>  
>  	ret = iio_device_register(indio_dev);
> -	if (ret)
> -		goto err_free_irq;
> -
> -	return ret;
> -
> -err_free_irq:
> -	free_irq(irq, indio_dev);
> -err_free_device:
> -	iio_device_free(indio_dev);
>  
>  	return ret;
>  }
> @@ -972,9 +958,7 @@ static int twl6030_gpadc_remove(struct platform_device *pdev)
>  	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
>  
>  	twl6030_gpadc_disable_irq(TWL6030_GPADC_RT_SW1_EOC_MASK);
> -	free_irq(platform_get_irq(pdev, 0), indio_dev);
>  	iio_device_unregister(indio_dev);
> -	iio_device_free(indio_dev);
>  
>  	return 0;
>  }
> 
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