Re: [PATCH v3 14/14] thermal: core: Clean up trip bind/unbind functions

["Zhang, Rui" <rui.zhang@intel.com>]

On Mon, 2024-08-19 at 18:33 +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> Make thermal_bind_cdev_to_trip() take a struct cooling_spec pointer
> to reduce the number of its arguments, change the return type of
> thermal_unbind_cdev_from_trip() to void and rearrange the code in
> thermal_zone_cdev_binding() to reduce the indentation level.
> 
> No intentional functional impact.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Reviewed-by: Zhang Rui <rui.zhang@intel.com>

thanks,
rui

> ---
> 
> v2 -> v3: Subject fix
> 
> v1-> v2: No changes
> 
> ---
>  drivers/thermal/thermal_core.c |   54 +++++++++++++++---------------
> -----------
>  1 file changed, 21 insertions(+), 33 deletions(-)
> 
> Index: linux-pm/drivers/thermal/thermal_core.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/thermal_core.c
> +++ linux-pm/drivers/thermal/thermal_core.c
> @@ -757,15 +757,7 @@ struct thermal_zone_device *thermal_zone
>   * @tz:                pointer to struct thermal_zone_device
>   * @trip:      trip point the cooling devices is associated with in
> this zone.
>   * @cdev:      pointer to struct thermal_cooling_device
> - * @upper:     the Maximum cooling state for this trip point.
> - *             THERMAL_NO_LIMIT means no upper limit,
> - *             and the cooling device can be in max_state.
> - * @lower:     the Minimum cooling state can be used for this trip
> point.
> - *             THERMAL_NO_LIMIT means no lower limit,
> - *             and the cooling device can be in cooling state 0.
> - * @weight:    The weight of the cooling device to be bound to the
> - *             thermal zone. Use THERMAL_WEIGHT_DEFAULT for the
> - *             default value
> + * @c:         cooling specification for @trip and @cdev
>   *
>   * This interface function bind a thermal cooling device to the
> certain trip
>   * point of a thermal zone device.
> @@ -776,8 +768,7 @@ struct thermal_zone_device *thermal_zone
>  static int thermal_bind_cdev_to_trip(struct thermal_zone_device *tz,
>                                      const struct thermal_trip *trip,
>                                      struct thermal_cooling_device
> *cdev,
> -                                    unsigned long upper, unsigned
> long lower,
> -                                    unsigned int weight)
> +                                    struct cooling_spec *c)
>  {
>         struct thermal_instance *dev;
>         struct thermal_instance *pos;
> @@ -791,17 +782,17 @@ static int thermal_bind_cdev_to_trip(str
>                 return -EINVAL;
>  
>         /* lower default 0, upper default max_state */
> -       if (lower == THERMAL_NO_LIMIT)
> -               lower = 0;
> +       if (c->lower == THERMAL_NO_LIMIT)
> +               c->lower = 0;
>  
> -       if (upper == THERMAL_NO_LIMIT) {
> -               upper = cdev->max_state;
> +       if (c->upper == THERMAL_NO_LIMIT) {
> +               c->upper = cdev->max_state;
>                 upper_no_limit = true;
>         } else {
>                 upper_no_limit = false;
>         }
>  
> -       if (lower > upper || upper > cdev->max_state)
> +       if (c->lower > c->upper || c->upper > cdev->max_state)
>                 return -EINVAL;
>  
>         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
> @@ -810,11 +801,11 @@ static int thermal_bind_cdev_to_trip(str
>         dev->tz = tz;
>         dev->cdev = cdev;
>         dev->trip = trip;
> -       dev->upper = upper;
> +       dev->upper = c->upper;
>         dev->upper_no_limit = upper_no_limit;
> -       dev->lower = lower;
> +       dev->lower = c->lower;
>         dev->target = THERMAL_NO_TARGET;
> -       dev->weight = weight;
> +       dev->weight = c->weight;
>  
>         result = ida_alloc(&tz->ida, GFP_KERNEL);
>         if (result < 0)
> @@ -887,12 +878,10 @@ free_mem:
>   * This interface function unbind a thermal cooling device from the
> certain
>   * trip point of a thermal zone device.
>   * This function is usually called in the thermal zone device
> .unbind callback.
> - *
> - * Return: 0 on success, the proper error value otherwise.
>   */
> -static int thermal_unbind_cdev_from_trip(struct thermal_zone_device
> *tz,
> -                                        const struct thermal_trip
> *trip,
> -                                        struct
> thermal_cooling_device *cdev)
> +static void thermal_unbind_cdev_from_trip(struct thermal_zone_device
> *tz,
> +                                         const struct thermal_trip
> *trip,
> +                                         struct
> thermal_cooling_device *cdev)
>  {
>         struct thermal_instance *pos, *next;
>  
> @@ -912,7 +901,7 @@ static int thermal_unbind_cdev_from_trip
>         }
>         mutex_unlock(&cdev->lock);
>  
> -       return -ENODEV;
> +       return;
>  
>  unbind:
>         device_remove_file(&tz->device, &pos->weight_attr);
> @@ -920,7 +909,6 @@ unbind:
>         sysfs_remove_link(&tz->device.kobj, pos->name);
>         ida_free(&tz->ida, pos->id);
>         kfree(pos);
> -       return 0;
>  }
>  
>  static void thermal_release(struct device *dev)
> @@ -959,7 +947,6 @@ static void thermal_zone_cdev_binding(st
>                                       struct thermal_cooling_device
> *cdev)
>  {
>         struct thermal_trip_desc *td;
> -       int ret;
>  
>         if (!tz->ops.should_bind)
>                 return;
> @@ -973,13 +960,14 @@ static void thermal_zone_cdev_binding(st
>                         .lower = THERMAL_NO_LIMIT,
>                         .weight = THERMAL_WEIGHT_DEFAULT
>                 };
> +               int ret;
>  
> -               if (tz->ops.should_bind(tz, trip, cdev, &c)) {
> -                       ret = thermal_bind_cdev_to_trip(tz, trip,
> cdev, c.upper,
> -                                                       c.lower,
> c.weight);
> -                       if (ret)
> -                               print_bind_err_msg(tz, trip, cdev,
> ret);
> -               }
> +               if (!tz->ops.should_bind(tz, trip, cdev, &c))
> +                       continue;
> +
> +               ret = thermal_bind_cdev_to_trip(tz, trip, cdev, &c);
> +               if (ret)
> +                       print_bind_err_msg(tz, trip, cdev, ret);
>         }
>  
>         mutex_unlock(&tz->lock);
> 
> 
>