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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d5066de3-100e-669f-b32a-1c6e5628b996@linaro.org>
Date:   Tue, 25 Oct 2022 13:22:56 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc:     Ulf Hansson <ulf.hansson@...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 24/10/2022 17:34, Johan Hovold 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>

Acked-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


> ---
> 
> 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);
>   }
>   

-- 
With best wishes
Dmitry