linux-kernel - Re: [PATCH 05/10] platform/x86: toshiba_acpi: register backlight with device-managed variant

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Date:   Mon, 29 Mar 2021 15:50:46 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Alexandru Ardelean <aardelean@...iqon.com>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org, coproscefalo@...il.com,
        hdegoede@...hat.com, mgross@...ux.intel.com, linux@...iqon.com
Subject: Re: [PATCH 05/10] platform/x86: toshiba_acpi: register backlight
 with device-managed variant

On Wed, 24 Mar 2021 14:55:43 +0200
Alexandru Ardelean <aardelean@...iqon.com> wrote:

> This change converts the registration of the backlight data with the
> devm_backlight_device_register() function.
> This way, the backlight_device_unregister() call is no longer required, and
> the order of deregistration is made to be more symmetrical with the
> registration order.
> 

This one looks fine to me.

> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/platform/x86/toshiba_acpi.c | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
> index 556f2cc99bad..ada2a2d8c913 100644
> --- a/drivers/platform/x86/toshiba_acpi.c
> +++ b/drivers/platform/x86/toshiba_acpi.c
> @@ -2876,7 +2876,8 @@ static int toshiba_acpi_setup_keyboard(struct device *parent,
>  	return error;
>  }
>  
> -static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
> +static int toshiba_acpi_setup_backlight(struct device *parent,
> +					struct toshiba_acpi_dev *dev)
>  {
>  	struct backlight_properties props;
>  	int brightness;
> @@ -2924,11 +2925,12 @@ static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
>  	if (dev->tr_backlight_supported)
>  		props.max_brightness++;
>  
> -	dev->backlight_dev = backlight_device_register("toshiba",
> -						       &dev->acpi_dev->dev,
> -						       dev,
> -						       &toshiba_backlight_data,
> -						       &props);
> +	dev->backlight_dev = devm_backlight_device_register(parent,
> +							    "toshiba",
> +							    &dev->acpi_dev->dev,
> +							    dev,
> +							    &toshiba_backlight_data,
> +							    &props);
>  	if (IS_ERR(dev->backlight_dev)) {
>  		ret = PTR_ERR(dev->backlight_dev);
>  		pr_err("Could not register toshiba backlight device\n");
> @@ -2999,8 +3001,6 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
>  		sysfs_remove_group(&dev->acpi_dev->dev.kobj,
>  				   &toshiba_attr_group);
>  
> -	backlight_device_unregister(dev->backlight_dev);
> -
>  	led_classdev_unregister(&dev->led_dev);
>  	led_classdev_unregister(&dev->kbd_led);
>  	led_classdev_unregister(&dev->eco_led);
> @@ -3104,9 +3104,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
>  	ret = get_tr_backlight_status(dev, &dummy);
>  	dev->tr_backlight_supported = !ret;
>  
> -	ret = toshiba_acpi_setup_backlight(dev);
> +	ret = toshiba_acpi_setup_backlight(parent, dev);
>  	if (ret)
> -		goto error;
> +		return ret;
>  
>  	toshiba_illumination_available(dev);
>  	if (dev->illumination_supported) {