linux-kernel - RE: [PATCH -next 2/5] ASoC: fsl_asrc: force cast the asrc

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Date:   Tue, 19 Jul 2022 10:01:54 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Shengjiu Wang' <shengjiu.wang@....com>,
        "shengjiu.wang@...il.com" <shengjiu.wang@...il.com>,
        "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "festevam@...il.com" <festevam@...il.com>,
        "nicoleotsuka@...il.com" <nicoleotsuka@...il.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH -next 2/5] ASoC: fsl_asrc: force cast the asrc_format type

From: Shengjiu Wang
> Sent: 19 July 2022 10:28
> 
> Fix sparse warning:
> sound/soc/fsl/fsl_asrc.c:1177:60: sparse: warning: incorrect type in argument 3 (different base types)
> sound/soc/fsl/fsl_asrc.c:1177:60: sparse:    expected unsigned int [usertype] *out_value
> sound/soc/fsl/fsl_asrc.c:1177:60: sparse:    got restricted snd_pcm_format_t *
> sound/soc/fsl/fsl_asrc.c:1200:47: sparse: warning: restricted snd_pcm_format_t degrades to integer
> 
> Fixes: 4520af41fd21 ("ASoC: fsl_asrc: Support new property fsl,asrc-format")
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  sound/soc/fsl/fsl_asrc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
> index 20a9f8e924b3..544395efd605 100644
> --- a/sound/soc/fsl/fsl_asrc.c
> +++ b/sound/soc/fsl/fsl_asrc.c
> @@ -1174,7 +1174,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
>  		return ret;
>  	}
> 
> -	ret = of_property_read_u32(np, "fsl,asrc-format", &asrc->asrc_format);
> +	ret = of_property_read_u32(np, "fsl,asrc-format", (u32 *)&asrc->asrc_format);

Ugg, you really shouldn't need to do that.
It means that something is badly wrong somewhere.
Casting pointers to integer types is just asking for a bug.

>  	if (ret) {
>  		ret = of_property_read_u32(np, "fsl,asrc-width", &width);
>  		if (ret) {
> @@ -1197,7 +1197,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
>  		}
>  	}
> 
> -	if (!(FSL_ASRC_FORMATS & (1ULL << asrc->asrc_format))) {
> +	if (!(FSL_ASRC_FORMATS & (1ULL << (__force u32)asrc->asrc_format))) {

Ditto.

	David

>  		dev_warn(&pdev->dev, "unsupported width, use default S24_LE\n");
>  		asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
>  	}
> --
> 2.34.1

-
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