linux-kernel - Re: [PATCH v4 4/4] extcon: Added extcon_alloc_groups to simplify extcon register function

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Message-ID: <3de6d1b0-51f8-368b-e73f-8c1e007bf7f8@gmail.com>
Date:   Mon, 13 Mar 2023 20:08:29 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Bumwoo Lee <bw365.lee@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/4] extcon: Added extcon_alloc_groups to simplify
 extcon register function

On 23. 3. 2. 18:01, Bumwoo Lee wrote:
> The alloc groups is functionalized from extcon_dev_register.
> 
> Signed-off-by: Bumwoo Lee <bw365.lee@...sung.com>
> ---
>  drivers/extcon/extcon.c | 58 +++++++++++++++++++++++++----------------
>  1 file changed, 36 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
> index 321988231806..c366a7988daf 100644
> --- a/drivers/extcon/extcon.c
> +++ b/drivers/extcon/extcon.c
> @@ -1181,6 +1181,39 @@ static int extcon_alloc_muex(struct extcon_dev *edev)
>  	return 0;
>  }
>  
> +/**
> + * extcon_alloc_groups() - alloc the groups for extcon device
> + * @edev:	extcon device
> + *
> + * Returns 0 if success or error number if fail.
> + */
> +static int extcon_alloc_groups(struct extcon_dev *edev)
> +{
> +	int index;
> +

ditto.

	if (!edev)
		return -EINVAL;

> +	if (!edev->max_supported)
> +		return 0;
> +
> +	edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,
> +			sizeof(struct attribute_group *),
> +			GFP_KERNEL);
> +	if (!edev->extcon_dev_type.groups)
> +		return -ENOMEM;
> +
> +	edev->extcon_dev_type.name = dev_name(&edev->dev);
> +	edev->extcon_dev_type.release = dummy_sysfs_dev_release;
> +
> +	for (index = 0; index < edev->max_supported; index++)
> +		edev->extcon_dev_type.groups[index] = &edev->cables[index].attr_g;
> +
> +	if (edev->mutually_exclusive)
> +		edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;
> +
> +	edev->dev.type = &edev->extcon_dev_type;
> +
> +	return 0;
> +}
> +
>  /**
>   * extcon_dev_register() - Register an new extcon device
>   * @edev:	the extcon device to be registered
> @@ -1236,28 +1269,9 @@ int extcon_dev_register(struct extcon_dev *edev)
>  	if (ret < 0)
>  		goto err_alloc_muex;
>  
> -	if (edev->max_supported) {
> -		edev->extcon_dev_type.groups =
> -			kcalloc(edev->max_supported + 2,
> -				sizeof(struct attribute_group *),
> -				GFP_KERNEL);
> -		if (!edev->extcon_dev_type.groups) {
> -			ret = -ENOMEM;
> -			goto err_alloc_groups;
> -		}
> -
> -		edev->extcon_dev_type.name = dev_name(&edev->dev);
> -		edev->extcon_dev_type.release = dummy_sysfs_dev_release;
> -
> -		for (index = 0; index < edev->max_supported; index++)
> -			edev->extcon_dev_type.groups[index] =
> -				&edev->cables[index].attr_g;
> -		if (edev->mutually_exclusive)
> -			edev->extcon_dev_type.groups[index] =
> -				&edev->attr_g_muex;
> -
> -		edev->dev.type = &edev->extcon_dev_type;
> -	}
> +	ret = extcon_alloc_groups(edev);
> +	if (ret < 0)
> +		goto err_alloc_groups;
>  
>  	spin_lock_init(&edev->lock);
>  	if (edev->max_supported) {

-- 
Best Regards,
Samsung Electronics
Chanwoo Choi