linux-kernel - Re: [PATCH 2/5] input: twl6040-vibra: add handler to unregister input if module is removed

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Message-ID: <20160418211257.GA1006@dtor-ws>
Date:	Mon, 18 Apr 2016 14:12:57 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	"H. Nikolaus Schaller" <hns@...delico.com>
Cc:	Fabio Estevam <fabio.estevam@...escale.com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...a-handheld.com, letux-kernel@...nphoenux.org
Subject: Re: [PATCH 2/5] input: twl6040-vibra: add handler to unregister
 input if module is removed

On Mon, Apr 18, 2016 at 09:55:38PM +0200, H. Nikolaus Schaller wrote:
> commit 1f9e1470ab34 ("Input: twl6040-vibra - use devm functions")
> 
> converted everything to devm but we still need to call
> input_unregister_device(info->input_dev)

No, this is not needed, because devm-managed input devices will be
unregistered automatically.

> 
> Solution: add back twl6040_vibra_remove to call input_unregister_device
> 
> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
> ---
>  drivers/input/misc/twl6040-vibra.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/input/misc/twl6040-vibra.c b/drivers/input/misc/twl6040-vibra.c
> index 7221a00..1e9902d 100644
> --- a/drivers/input/misc/twl6040-vibra.c
> +++ b/drivers/input/misc/twl6040-vibra.c
> @@ -384,8 +384,18 @@ static int twl6040_vibra_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static int twl6040_vibra_remove(struct platform_device *pdev)
> +{
> +	struct vibra_info *info = platform_get_drvdata(pdev);
> +
> +	input_unregister_device(info->input_dev);
> +
> +	return 0;
> +	}
> +
>  static struct platform_driver twl6040_vibra_driver = {
>  	.probe		= twl6040_vibra_probe,
> +	.remove		= twl6040_vibra_remove,
>  	.driver		= {
>  		.name	= "twl6040-vibra",
>  		.pm	= &twl6040_vibra_pm_ops,
> -- 
> 2.7.3
> 

Thanks.

-- 
Dmitry