linux-kernel - Re: [PATCH v2] ASoC: rt5677: Fix initialization of rt5677_of

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Date:   Tue, 7 Aug 2018 10:29:25 -0700
From:   Guenter Roeck <groeck@...gle.com>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     bardliao@...ltek.com, oder_chiou@...ltek.com,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Guenter Roeck <groeck@...omium.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        andriy.shevchenko@...ux.intel.com
Subject: Re: [PATCH v2] ASoC: rt5677: Fix initialization of rt5677_of_match.data

On Tue, Aug 7, 2018 at 10:19 AM Matthias Kaehlcke <mka@...omium.org> wrote:
>
> The driver expects to find the device id in rt5677_of_match.data, however
> it is currently assigned to rt5677_of_match.type. Fix this.
>
> The problem was found with the help of clang:
>   sound/soc/codecs/rt5677.c:5010:36: warning: expression which evaluates to
>   zero treated as a null pointer constant of type 'const void *'
>   [-Wnon-literal-null-conversion]
>     { .compatible = "realtek,rt5677", RT5677 },
>                                       ^~~~~~
>
> Fixes: ddc9e69b9dc2 ("ASoC: rt5677: Hide platform data in the module sources")
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>

Reviewed-by: Guenter Roeck <groeck@...omium.org>

> --
> Changes in v2:
> - assign device id to data instead of 'type'
> - updated subject and commit message
> - added: 'Fixes' tag
> ---
>  sound/soc/codecs/rt5677.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
> index 8a0181a2db08..47feef30dadb 100644
> --- a/sound/soc/codecs/rt5677.c
> +++ b/sound/soc/codecs/rt5677.c
> @@ -5007,7 +5007,7 @@ static const struct regmap_config rt5677_regmap = {
>  };
>
>  static const struct of_device_id rt5677_of_match[] = {
> -       { .compatible = "realtek,rt5677", RT5677 },
> +       { .compatible = "realtek,rt5677", .data = (const void *)RT5677 },
>         { }
>  };
>  MODULE_DEVICE_TABLE(of, rt5677_of_match);
> --
> 2.18.0.597.ga71716f1ad-goog
>