linux-kernel - Re: [PATCH v2 2/5] thermal: core: Get thermal zone by id

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Message-ID: <CAP245DVMJ59nBSwpsW5CTm5hiCNBrtUSxE0qwg9=B9TYv9c26Q@mail.gmail.com>
Date:   Tue, 30 Jun 2020 17:24:31 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     Zhang Rui <rui.zhang@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Ram Chandrasekar <rkumbako@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/5] thermal: core: Get thermal zone by id

On Thu, Jun 25, 2020 at 8:15 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> The next patch will introduce the generic netlink protocol to handle
> events, sampling and command from the thermal framework. In order to
> deal with the thermal zone, it uses its unique identifier to
> characterize it in the message. Passing an integer is more efficient
> than passing an entire string.
>
> This change provides a function returning back a thermal zone pointer
> corresponding to the identifier passed as parameter.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>

Reviewed-by: Amit Kucheria <amit.kucheria@...aro.org>

> ---
>  drivers/thermal/thermal_core.c | 14 ++++++++++++++
>  drivers/thermal/thermal_core.h |  2 ++
>  2 files changed, 16 insertions(+)
>
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index e2f8d2550ecd..58c95aeafb7f 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -662,6 +662,20 @@ int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
>         return ret;
>  }
>
> +struct thermal_zone_device *thermal_zone_get_by_id(int id)
> +{
> +       struct thermal_zone_device *tz = NULL;
> +
> +       mutex_lock(&thermal_list_lock);
> +       list_for_each_entry(tz, &thermal_tz_list, node) {
> +               if (tz->id == id)
> +                       break;
> +       }
> +       mutex_unlock(&thermal_list_lock);
> +
> +       return tz;
> +}
> +
>  void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz,
>                                           const char *cdev_type, size_t size)
>  {
> diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
> index bb8f8aee79eb..7e8f45db6bbf 100644
> --- a/drivers/thermal/thermal_core.h
> +++ b/drivers/thermal/thermal_core.h
> @@ -50,6 +50,8 @@ int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
>  int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
>                               void *thermal_governor);
>
> +struct thermal_zone_device *thermal_zone_get_by_id(int id);
> +
>  struct thermal_attr {
>         struct device_attribute attr;
>         char name[THERMAL_NAME_LENGTH];
> --
> 2.17.1
>