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

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Date:   Fri, 14 Apr 2023 12:01:07 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.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 RESEND v2] firmware/psci: demote suspend-mode warning to
 info level

On Fri, Apr 14, 2023 at 10:46:19AM +0200, Johan Hovold 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
> 
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> Acked-by: Mark Rutland <mark.rutland@....com>
> Acked-by: Sudeep Holla <sudeep.holla@....com>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
> 
> This one fell between the cracks so resending with tags added.
> 
> Mark or Lorenzo, is this something you can pick up?
> 
> Johan

Sorry about this.

I don't think we have anything else in this area, so Arnd, are you happy to
pick this via the soc tree?

Thanks,
Mark.

> 
> 
>  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 29619f49873a..d9629ff87861 100644
> --- a/drivers/firmware/psci/psci.c
> +++ b/drivers/firmware/psci/psci.c
> @@ -167,7 +167,8 @@ 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);
>  }
>  
> -- 
> 2.39.2
>