linux-kernel - Re: [PATCH v2] powercap: intel_rapl: Downgrade BIOS locked limits pr_warn() to pr

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Date:   Tue, 24 Oct 2023 22:08:15 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Ville Syrjala <ville.syrjala@...ux.intel.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org, Zhang Rui <rui.zhang@...el.com>,
        Wang Wendy <wendy.wang@...el.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...el.com>
Subject: Re: [PATCH v2] powercap: intel_rapl: Downgrade BIOS locked limits
 pr_warn() to pr_debug()

On Tue, Oct 24, 2023 at 9:17 PM Ville Syrjala
<ville.syrjala@...ux.intel.com> wrote:
>
> From: Ville Syrjälä <ville.syrjala@...ux.intel.com>
>
> Before the refactoring the pr_warn() only triggered when
> someone explicitly tried to write to a BIOS locked limit.
> After the refactoring the warning is also triggering during
> system resume. The user can't do anything about this so
> printing scary warnings doesn't make sense
>
> Keep the printk but make it pr_debug() instead of pr_warn()
> to make it clear it's not a serious issue.
>
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: Wang Wendy <wendy.wang@...el.com>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Cc: Srinivas Pandruvada <srinivas.pandruvada@...el.com>
> Fixes: 9050a9cd5e4c ("powercap: intel_rapl: Cleanup Power Limits support")
> Signed-off-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> ---
>  drivers/powercap/intel_rapl_common.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
> index 40a2cc649c79..2feed036c1cd 100644
> --- a/drivers/powercap/intel_rapl_common.c
> +++ b/drivers/powercap/intel_rapl_common.c
> @@ -892,7 +892,7 @@ static int rapl_write_pl_data(struct rapl_domain *rd, int pl,
>                 return -EINVAL;
>
>         if (rd->rpl[pl].locked) {
> -               pr_warn("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl]);
> +               pr_debug("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl]);
>                 return -EACCES;
>         }
>
> --

Applied, thanks!