Re: [PATCH] divide by 3*sizeof(u32) when computing array_size

[Philipp Hahn]

Hello,

Disclaimer: I have no idea what 'pwm-stm32' is or does

Am 13.07.21 um 01:19 schrieb Salah Triki:
> Divide by 3*sizeof(u32) when computing array_size, since stm32_breakinput
> has 3 fields of type u32.
...
> --- a/drivers/pwm/pwm-stm32.c
> +++ b/drivers/pwm/pwm-stm32.c
> @@ -544,7 +544,7 @@ static int stm32_pwm_probe_breakinputs(struct stm32_pwm *priv,
>   		return -EINVAL;
>   
>   	priv->num_breakinputs = nb;
> -	array_size = nb * sizeof(struct stm32_breakinput) / sizeof(u32);
> +	array_size = nb * sizeof(struct stm32_breakinput) / (3 * sizeof(u32));

Maybe it's too early in the morning for me, but this does not look right:

> struct stm32_breakinput {
> 	u32 index;
> 	u32 level;
> 	u32 filter;
> };

then "sizeof(struct stm32_breakinput)" == "(3 * sizeof(u32))", which 
would simply make "arrray_site := nb" ?

Philipp