linux-kernel - Re: [PATCH] ACPI: thermal: Drop nocrt parameter

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Date:   Thu, 13 Jul 2023 17:31:16 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Mario Limonciello <mario.limonciello@....com>
Cc:     rafael@...nel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org
Subject: Re: [PATCH] ACPI: thermal: Drop nocrt parameter

On Wed, Jul 12, 2023 at 7:25 PM Mario Limonciello
<mario.limonciello@....com> wrote:
>
> The `nocrt` module parameter has no code associated with it and does
> nothing.  As `crt=-1` has same functionality as what nocrt should be
> doing drop `nocrt` and associated documentation.
>
> This should fix a quirk for Gigabyte GA-7ZX that used `nocrt` and
> thus didn't function properly.
>
> Fixes: 8c99fdce3078 ("ACPI: thermal: set "thermal.nocrt" via DMI on Gigabyte GA-7ZX")
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>

Stable material I suppose?

> ---
>  Documentation/admin-guide/kernel-parameters.txt | 4 ----
>  drivers/acpi/thermal.c                          | 6 +-----
>  2 files changed, 1 insertion(+), 9 deletions(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index a1457995fd41c..2de235d52faca 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -6243,10 +6243,6 @@
>                         -1: disable all critical trip points in all thermal zones
>                         <degrees C>: override all critical trip points
>
> -       thermal.nocrt=  [HW,ACPI]
> -                       Set to disable actions on ACPI thermal zone
> -                       critical and hot trip points.
> -
>         thermal.off=    [HW,ACPI]
>                         1: disable ACPI thermal control
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index f9f6ebb08fdb7..3163a40f02e30 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -82,10 +82,6 @@ static int tzp;
>  module_param(tzp, int, 0444);
>  MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
>
> -static int nocrt;
> -module_param(nocrt, int, 0);
> -MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
> -
>  static int off;
>  module_param(off, int, 0);
>  MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
> @@ -1094,7 +1090,7 @@ static int thermal_act(const struct dmi_system_id *d) {
>  static int thermal_nocrt(const struct dmi_system_id *d) {
>         pr_notice("%s detected: disabling all critical thermal trip point actions.\n",
>                   d->ident);
> -       nocrt = 1;
> +       crt = -1;
>         return 0;
>  }
>  static int thermal_tzp(const struct dmi_system_id *d) {
> --