Re: [PATCH 11/11] pinctrl: st: Annotate st_pinconf_dbg_show() as holding mutex

[Patrice CHOTARD <patrice.chotard@foss.st.com>]

On 1/14/26 16:30, Krzysztof Kozlowski wrote:
> st_pinconf_dbg_show() unlocks and locks the pinctrl_dev mutex, so it
> must be called by the pinctrl core with the mutex hold.  Annotate the
> function with sparse __must_hold, so any changes in pinctrl locking will
> be statically detected.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> 
> ---
> 
> I think this is still useful, although maybe a bit pointless if core
> explicitly always locks every pin_config_dbg_show() call? Anyway,
> pattern of unlock+lock feels to me like something worth annotating.
> 
> I left the patch at the end of the set so it can be nicely discarded.
> ---
>  drivers/pinctrl/pinctrl-st.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
> index d3cea3437d7f..8ce88e591f47 100644
> --- a/drivers/pinctrl/pinctrl-st.c
> +++ b/drivers/pinctrl/pinctrl-st.c
> @@ -987,6 +987,7 @@ static int st_pinconf_get(struct pinctrl_dev *pctldev,
>  
>  static void st_pinconf_dbg_show(struct pinctrl_dev *pctldev,
>  				   struct seq_file *s, unsigned pin_id)
> +	__must_hold(&pctldev->mutex)
>  {
>  	struct st_pio_control *pc;
>  	unsigned long config;
> 

Hi Krzysztof

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Thanks
Patrice