Re: [PATCH 02/10] watchdog: rzg2l_wdt: Use pm_runtime_resume_and_get()

[Geert Uytterhoeven]

Hi Claudiu,

On Mon, Jan 22, 2024 at 12:11 PM Claudiu <claudiu.beznea@xxxxxxxxx> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
>
> pm_runtime_get_sync() may return with error. In case it returns with error
> dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get()
> takes care of this. Thus use it.
>
> Fixes: 2cbc5cd0b55f ("watchdog: Add Watchdog Timer driver for RZ/G2L")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>

Thanks for your patch!

> --- a/drivers/watchdog/rzg2l_wdt.c
> +++ b/drivers/watchdog/rzg2l_wdt.c
> @@ -123,8 +123,11 @@ static void rzg2l_wdt_init_timeout(struct watchdog_device *wdev)
>  static int rzg2l_wdt_start(struct watchdog_device *wdev)
>  {
>         struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev);
> +       int ret;
>
> -       pm_runtime_get_sync(wdev->parent);
> +       ret = pm_runtime_resume_and_get(wdev->parent);
> +       if (ret)
> +               return ret;
>
>         /* Initialize time out */
>         rzg2l_wdt_init_timeout(wdev);

To actually handle this error condition, rzg2l_wdt_set_timeout() should
be updated to propagate the error to its caller, too.

Anyway, most of this is moot, as pm_runtime_get_sync() won't ever
fail on Renesas arm/risc-v systems...

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds