linux-kernel - Re: [V2 2/6] driver core: auxiliary bus: Add driver data helpers

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Date:   Wed, 8 Dec 2021 09:03:16 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     "David E. Box" <david.e.box@...ux.intel.com>
Cc:     lee.jones@...aro.org, hdegoede@...hat.com, bhelgaas@...gle.com,
        gregkh@...uxfoundation.org, andriy.shevchenko@...ux.intel.com,
        srinivas.pandruvada@...el.com, shuah@...nel.org,
        mgross@...ux.intel.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [V2 2/6] driver core: auxiliary bus: Add driver data helpers

On Tue, Dec 07, 2021 at 09:14:44AM -0800, David E. Box wrote:
> Adds get/set driver data helpers for auxiliary devices.
> 
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> Reviewed-by: Mark Gross <markgross@...nel.org>
> ---
> V2
>   - No changes
> 
>  include/linux/auxiliary_bus.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)

I would really like to see an explanation why such obfuscation is really
needed. dev_*_drvdata() is a standard way to access driver data.

Thanks

> 
> diff --git a/include/linux/auxiliary_bus.h b/include/linux/auxiliary_bus.h
> index fc51d45f106b..a8338d456e81 100644
> --- a/include/linux/auxiliary_bus.h
> +++ b/include/linux/auxiliary_bus.h
> @@ -28,6 +28,16 @@ struct auxiliary_driver {
>  	const struct auxiliary_device_id *id_table;
>  };
>  
> +static inline void *auxiliary_get_drvdata(struct auxiliary_device *auxdev)
> +{
> +	return dev_get_drvdata(&auxdev->dev);
> +}
> +
> +static inline void auxiliary_set_drvdata(struct auxiliary_device *auxdev, void *data)
> +{
> +	dev_set_drvdata(&auxdev->dev, data);
> +}
> +
>  static inline struct auxiliary_device *to_auxiliary_dev(struct device *dev)
>  {
>  	return container_of(dev, struct auxiliary_device, dev);
> -- 
> 2.25.1
>