linux-kernel - Re: [RESEND PATCH v3 1/2] acpi: thermal: initialize tz

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Date:   Tue, 27 Feb 2018 17:17:55 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     "Zhang, Rui" <rui.zhang@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Guenter Roeck <groeck@...omium.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sameer Nanda <snanda@...omium.org>, Len Brown <lenb@...nel.org>
Subject: Re: [RESEND PATCH v3 1/2] acpi: thermal: initialize tz_enabled to 1

On Mon, Feb 26, 2018 at 3:41 PM, Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
> From: Sameer Nanda <snanda@...omium.org>
>
> In the acpi_thermal_add path, acpi_thermal_get_info gets called before
> acpi_thermal_register_thermal_zone.  Since tz_enabled was getting set to
> 1 only in acpi_thermal_register_thermal_zone, acpi_thermal_get_info
> ended up disabling thermal polling.
>
> Moved setting of tz_enabled to 1 into acpi_thermal_add itself.
>
> Signed-off-by: Sameer Nanda <snanda@...omium.org>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> That's another attempt to land these to patches that were sent long time
> ago but never got merged, although, apparently, there is no issue with
> it. Latest discussion about these here:
>
>  https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1436081.html

I can apply this one, but the other one has to go in through the Rui's tree.

> Changes in v3:
> - [1/2] Make sure tz->tz_enabled is set properly before registering the
>   zone (Zhang Rui)
>
> Changes in v2:
> - [1/2] This patch is new from v1
>   (https://patchwork.kernel.org/patch/9804229/)
>
>  drivers/acpi/thermal.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 551b71a24b85..1d8f185e96c6 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -930,8 +930,6 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>         if (ACPI_FAILURE(status))
>                 return -ENODEV;
>
> -       tz->tz_enabled = 1;
> -
>         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
>                  tz->thermal_zone->id);
>         return 0;
> @@ -1088,6 +1086,7 @@ static int acpi_thermal_add(struct acpi_device *device)
>                 return -ENOMEM;
>
>         tz->device = device;
> +       tz->tz_enabled = 1;
>         strcpy(tz->name, device->pnp.bus_id);
>         strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
>         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
> --
> 2.16.1
>
> --
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