linux-kernel - Re: [PATCH] firmware/psci: demote suspend-mode warning to debug level

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Message-ID: <CAPDyKFqN_2jiRReL9dkMZeUg3jK2+TqHRHziYz9=baGzbDO+Ng@mail.gmail.com>
Date:   Tue, 25 Oct 2022 15:03:56 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] firmware/psci: demote suspend-mode warning to debug level

On Mon, 24 Oct 2022 at 16:36, Johan Hovold <johan+linaro@...nel.org> wrote:
>
> On some Qualcomm platform, like SC8280XP, the attempt to set PC mode
> during boot fails with PSCI_RET_DENIED and since commit 998fcd001feb
> ("firmware/psci: Print a warning if PSCI doesn't accept PC mode") this
> is now logged at warning level:
>
>         psci: failed to set PC mode: -3
>
> As there is nothing users can do about the firmware behaving this way,
> demote the warning to debug level.
>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

FYI, I would be fine with a pr_info() too.

Kind regards
Uffe

> ---
>
> Note that a separate change to the cpuidle driver will start logging the
> mode actually used:
>
>         https://lore.kernel.org/all/20221020115513.93809-1-ulf.hansson@linaro.org/
>
> Johan
>
>
>  drivers/firmware/psci/psci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
> index e7bcfca4159f..462f37fa6a86 100644
> --- a/drivers/firmware/psci/psci.c
> +++ b/drivers/firmware/psci/psci.c
> @@ -165,7 +165,7 @@ int psci_set_osi_mode(bool enable)
>
>         err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, suspend_mode, 0, 0);
>         if (err < 0)
> -               pr_warn("failed to set %s mode: %d\n", enable ? "OSI" : "PC", err);
> +               pr_debug("failed to set %s mode: %d\n", enable ? "OSI" : "PC", err);
>         return psci_to_linux_errno(err);
>  }
>
> --
> 2.37.3
>