Re: [PATCH] [v2] ASoC: sophgo: fix 64-bit division build failure

[Alexander Sverdlin <alexander.sverdlin@gmail.com>]

On Mon, 2026-02-02 at 22:59 +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> cv1800b_adc_setbclk_div() does four 64-bit divisions in a row, which
> is rather inefficient on 32-bit systems, and using the plain division
> causes a build failure as a result:
> 
> ERROR: modpost: "__aeabi_uldivmod" [sound/soc/sophgo/cv1800b-sound-adc.ko] undefined!
> 
> As the input value is actually a 32-bit integer, just change the type
> of the temporary value as well.
> 
> Fixes: 4cf8752a03e6 ("ASoC: sophgo: add CV1800B internal ADC codec driver")
> Suggested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>

> ---
>  sound/soc/sophgo/cv1800b-sound-adc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/sophgo/cv1800b-sound-adc.c b/sound/soc/sophgo/cv1800b-sound-adc.c
> index 794030b713e9..de1c77014c2f 100644
> --- a/sound/soc/sophgo/cv1800b-sound-adc.c
> +++ b/sound/soc/sophgo/cv1800b-sound-adc.c
> @@ -100,7 +100,7 @@ static int cv1800b_adc_setbclk_div(struct cv1800b_priv *priv, unsigned int rate)
>  {
>  	u32 val;
>  	u32 bclk_div;
> -	u64 tmp;
> +	u32 tmp;
>  
>  	if (!priv->mclk_rate || !rate)
>  		return -EINVAL;
> @@ -117,7 +117,7 @@ static int cv1800b_adc_setbclk_div(struct cv1800b_priv *priv, unsigned int rate)
>  	}
>  
>  	if (tmp > 256) {
> -		dev_err(priv->dev, "BCLK divider %llu out of range\n", tmp);
> +		dev_err(priv->dev, "BCLK divider %u out of range\n", tmp);
>  		return -EINVAL;
>  	}
>  

-- 
Alexander Sverdlin.