linux-kernel - Re: [PATCH v2 1/2] hwmon: (oxp-sensors) Move tt_toggle attribute to dev

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Message-ID: <bf0f1dc5-35b8-4a72-be11-692e82fe6ab9@roeck-us.net>
Date:   Tue, 18 Jul 2023 19:42:34 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Joaquín Ignacio Aramendía <samsagax@...il.com>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v2 1/2] hwmon: (oxp-sensors) Move tt_toggle attribute to
 dev_groups

On Mon, Jul 17, 2023 at 07:25:15PM -0300, Joaquín Ignacio Aramendía wrote:
> A driver should not be manually adding groups in its probe function (it will
> race with userspace), so replace the call to devm_device_add_groups() to use
> the platform dev_groups callback instead.
> 
> This will allow for removal of the devm_device_add_groups() function.
> 
> Signed-off-by: Joaquín Ignacio Aramendía <samsagax@...il.com>
> Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Applied.

Thanks,
Guenter

> ---
>  drivers/hwmon/oxp-sensors.c | 38 +++++++++++++++++++++++--------------
>  1 file changed, 24 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/hwmon/oxp-sensors.c b/drivers/hwmon/oxp-sensors.c
> index e1a907cae820..1e1cc67bcdea 100644
> --- a/drivers/hwmon/oxp-sensors.c
> +++ b/drivers/hwmon/oxp-sensors.c
> @@ -220,6 +220,20 @@ static int tt_toggle_disable(void)
>  }
>  
>  /* Callbacks for turbo toggle attribute */
> +static umode_t tt_toggle_is_visible(struct kobject *kobj,
> +				    struct attribute *attr, int n)
> +{
> +	switch (board) {
> +	case aok_zoe_a1:
> +	case oxp_mini_amd_a07:
> +	case oxp_mini_amd_pro:
> +		return attr->mode;
> +	default:
> +		break;
> +	}
> +	return 0;
> +}
> +
>  static ssize_t tt_toggle_store(struct device *dev,
>  			       struct device_attribute *attr, const char *buf,
>  			       size_t count)
> @@ -396,7 +410,15 @@ static struct attribute *oxp_ec_attrs[] = {
>  	NULL
>  };
>  
> -ATTRIBUTE_GROUPS(oxp_ec);
> +static struct attribute_group oxp_ec_attribute_group = {
> +	.is_visible = tt_toggle_is_visible,
> +	.attrs = oxp_ec_attrs,
> +};
> +
> +static const struct attribute_group *oxp_ec_groups[] = {
> +	&oxp_ec_attribute_group,
> +	NULL
> +};
>  
>  static const struct hwmon_ops oxp_ec_hwmon_ops = {
>  	.is_visible = oxp_ec_hwmon_is_visible,
> @@ -415,7 +437,6 @@ static int oxp_platform_probe(struct platform_device *pdev)
>  	const struct dmi_system_id *dmi_entry;
>  	struct device *dev = &pdev->dev;
>  	struct device *hwdev;
> -	int ret;
>  
>  	/*
>  	 * Have to check for AMD processor here because DMI strings are the
> @@ -430,18 +451,6 @@ static int oxp_platform_probe(struct platform_device *pdev)
>  
>  	board = (enum oxp_board)(unsigned long)dmi_entry->driver_data;
>  
> -	switch (board) {
> -	case aok_zoe_a1:
> -	case oxp_mini_amd_a07:
> -	case oxp_mini_amd_pro:
> -		ret = devm_device_add_groups(dev, oxp_ec_groups);
> -		if (ret)
> -			return ret;
> -		break;
> -	default:
> -		break;
> -	}
> -
>  	hwdev = devm_hwmon_device_register_with_info(dev, "oxpec", NULL,
>  						     &oxp_ec_chip_info, NULL);
>  
> @@ -451,6 +460,7 @@ static int oxp_platform_probe(struct platform_device *pdev)
>  static struct platform_driver oxp_platform_driver = {
>  	.driver = {
>  		.name = "oxp-platform",
> +		.dev_groups = oxp_ec_groups,
>  	},
>  	.probe = oxp_platform_probe,
>  };