linux-kernel - Re: [PATCH v2] firmware/psci: demote suspend-mode warning to info level

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Date:   Thu, 27 Oct 2022 12:59:14 +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 v2] firmware/psci: demote suspend-mode warning to info level

On Wed, 26 Oct 2022 at 15:57, Johan Hovold <johan+linaro@...nel.org> wrote:
>
> On some Qualcomm platforms, 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 info level and clearly mark it as a firmware bug:
>
>         psci: [Firmware Bug]: failed to set PC mode: -3
>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Using the info level seems like a good compromise to me! So,

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

Kind regards
Uffe

> ---
>  drivers/firmware/psci/psci.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
> index e7bcfca4159f..f8fa32f0a130 100644
> --- a/drivers/firmware/psci/psci.c
> +++ b/drivers/firmware/psci/psci.c
> @@ -165,7 +165,8 @@ 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_info(FW_BUG "failed to set %s mode: %d\n",
> +                               enable ? "OSI" : "PC", err);
>         return psci_to_linux_errno(err);
>  }
>
> --
> 2.37.3
>