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

From: Chanwoo Choi
Date: Mon Mar 13 2023 - 07:08:44 EST


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@xxxxxxxxxxx>
> ---
> 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