Re: [PATCH] iio: imu: bmi323: use min_t() for watermark limit

[David Laight <david.laight.linux@gmail.com>]

On Sun,  7 Jun 2026 13:22:00 +0000
Hungyu Lin <dennylin0707@gmail.com> wrote:

> Use min_t(u32, ...) instead of min() with an explicit cast to
> match the argument types and address a checkpatch.pl warning.
> 
> No functional change intended.

Right - provided when you read the code you find the definition of 'val'
and check that it isn't 64bit.
min_t(u32, x, y) is just min((u32)x, (u32)y) so using it adds another cast.
I really don't see why that was ever a good idea... 

> 
> Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
> ---
>  drivers/iio/imu/bmi323/bmi323_core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/imu/bmi323/bmi323_core.c b/drivers/iio/imu/bmi323/bmi323_core.c
> index f3d499423399..38ad05f9ef58 100644
> --- a/drivers/iio/imu/bmi323/bmi323_core.c
> +++ b/drivers/iio/imu/bmi323/bmi323_core.c
> @@ -1128,7 +1128,7 @@ static int bmi323_set_watermark(struct iio_dev *indio_dev, unsigned int val)
>  {
>  	struct bmi323_data *data = iio_priv(indio_dev);
>  
> -	val = min(val, (u32)BMI323_FIFO_FULL_IN_FRAMES);
> +	val = min_t(u32, val, BMI323_FIFO_FULL_IN_FRAMES);

Ignore checkpatch :-)
Or just remove the original (u32) cast.

I really must rewrite the checkpatch 'stuff' about min_t().

-- David


>  
>  	guard(mutex)(&data->mutex);
>  	data->watermark = val;