linux-kernel - Re: [PATCHv3 3/5] Input: tsc2005: convert driver to use devm

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Date:	Sun, 18 May 2014 22:33:56 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Sebastian Reichel <sre@...nel.org>
Cc:	Sebastian Reichel <sre@...g0.de>, linux-input@...r.kernel.org,
	Tony Lindgren <tony@...mide.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 3/5] Input: tsc2005: convert driver to use devm_*

On Sat, Apr 26, 2014 at 01:56:17AM +0200, Sebastian Reichel wrote:
> Simplify the driver by using managed resources for memory allocation of
> internal struct, input device allocation and irq request.
> 
> Signed-off-by: Sebastian Reichel <sre@...nel.org>

Applied, thank you.

> ---
>  drivers/input/touchscreen/tsc2005.c | 30 ++++++++++--------------------
>  1 file changed, 10 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
> index 520e673..9daaddd 100644
> --- a/drivers/input/touchscreen/tsc2005.c
> +++ b/drivers/input/touchscreen/tsc2005.c
> @@ -604,12 +604,10 @@ static int tsc2005_probe(struct spi_device *spi)
>  	if (error)
>  		return error;
>  
> -	ts = kzalloc(sizeof(*ts), GFP_KERNEL);
> -	input_dev = input_allocate_device();
> -	if (!ts || !input_dev) {
> -		error = -ENOMEM;
> -		goto err_free_mem;
> -	}
> +	ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
> +	input_dev = devm_input_allocate_device(&spi->dev);
> +	if (!ts || !input_dev)
> +		return -ENOMEM;
>  
>  	ts->spi = spi;
>  	ts->idev = input_dev;
> @@ -649,12 +647,13 @@ static int tsc2005_probe(struct spi_device *spi)
>  	/* Ensure the touchscreen is off */
>  	tsc2005_stop_scan(ts);
>  
> -	error = request_threaded_irq(spi->irq, NULL, tsc2005_irq_thread,
> -				     IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> -				     "tsc2005", ts);
> +	error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
> +					  tsc2005_irq_thread,
> +					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> +					  "tsc2005", ts);
>  	if (error) {
>  		dev_err(&spi->dev, "Failed to request irq, err: %d\n", error);
> -		goto err_free_mem;
> +		return error;
>  	}
>  
>  	spi_set_drvdata(spi, ts);
> @@ -662,7 +661,7 @@ static int tsc2005_probe(struct spi_device *spi)
>  	if (error) {
>  		dev_err(&spi->dev,
>  			"Failed to create sysfs attributes, err: %d\n", error);
> -		goto err_clear_drvdata;
> +		return error;
>  	}
>  
>  	error = input_register_device(ts->idev);
> @@ -677,11 +676,6 @@ static int tsc2005_probe(struct spi_device *spi)
>  
>  err_remove_sysfs:
>  	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
> -err_clear_drvdata:
> -	free_irq(spi->irq, ts);
> -err_free_mem:
> -	input_free_device(input_dev);
> -	kfree(ts);
>  	return error;
>  }
>  
> @@ -691,10 +685,6 @@ static int tsc2005_remove(struct spi_device *spi)
>  
>  	sysfs_remove_group(&ts->spi->dev.kobj, &tsc2005_attr_group);
>  
> -	free_irq(ts->spi->irq, ts);
> -	input_unregister_device(ts->idev);
> -	kfree(ts);
> -
>  	return 0;
>  }
>  
> -- 
> 1.9.2
> 

-- 
Dmitry
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