linux-kernel - Re: [PATCH 5/6] ac97: make remove callback of ac97 driver void returned

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Date:   Mon, 5 Dec 2022 17:03:37 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Dawei Li <set_pte_at@...look.com>
Cc:     johannes@...solutions.net, robert.jarzmik@...e.fr, jgross@...e.com,
        sstabellini@...nel.org, oleksandr_tyshchenko@...m.com,
        roger.pau@...rix.com, srinivas.kandagatla@...aro.org,
        bgoswami@...cinc.com, mpe@...erman.id.au, npiggin@...il.com,
        christophe.leroy@...roup.eu, kys@...rosoft.com,
        haiyangz@...rosoft.com, wei.liu@...nel.org, decui@...rosoft.com,
        alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
        xen-devel@...ts.xenproject.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] ac97: make remove callback of ac97 driver void
 returned

On Mon, Dec 05, 2022 at 11:36:43PM +0800, Dawei Li wrote:
> Since commit fc7a6209d571 ("bus: Make remove callback return
> void") forces bus_type::remove be void-returned, it doesn't
> make much sense for any bus based driver implementing remove
> callbalk to return non-void to its caller.
> 
> This change is for ac97 bus based drivers.
> 
> Signed-off-by: Dawei Li <set_pte_at@...look.com>
> ---
>  drivers/mfd/wm97xx-core.c  | 4 +---
>  include/sound/ac97/codec.h | 6 +++---
>  sound/ac97/bus.c           | 5 ++---
>  3 files changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/mfd/wm97xx-core.c b/drivers/mfd/wm97xx-core.c
> index 9a2331eb1bfa..663acbb1854c 100644
> --- a/drivers/mfd/wm97xx-core.c
> +++ b/drivers/mfd/wm97xx-core.c
> @@ -319,13 +319,11 @@ static int wm97xx_ac97_probe(struct ac97_codec_device *adev)
>  	return ret;
>  }
>  
> -static int wm97xx_ac97_remove(struct ac97_codec_device *adev)
> +static void wm97xx_ac97_remove(struct ac97_codec_device *adev)
>  {
>  	struct wm97xx_priv *wm97xx = ac97_get_drvdata(adev);
>  
>  	snd_ac97_compat_release(wm97xx->ac97);
> -
> -	return 0;
>  }
>  
>  static const struct ac97_id wm97xx_ac97_ids[] = {
> diff --git a/include/sound/ac97/codec.h b/include/sound/ac97/codec.h
> index 9792d25fa369..a26e9e0082f6 100644
> --- a/include/sound/ac97/codec.h
> +++ b/include/sound/ac97/codec.h
> @@ -62,9 +62,9 @@ struct ac97_codec_device {
>   */
>  struct ac97_codec_driver {
>  	struct device_driver	driver;
> -	int			(*probe)(struct ac97_codec_device *);
> -	int			(*remove)(struct ac97_codec_device *);
> -	void			(*shutdown)(struct ac97_codec_device *);
> +	int			(*probe)(struct ac97_codec_device *dev);

Why did you change this line?

> +	void			(*remove)(struct ac97_codec_device *dev);
> +	void			(*shutdown)(struct ac97_codec_device *dev);

And this line?

Don't change things that you don't describe in your changelog and that
are not needed for your change.

thanks,

greg k-h