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Subject: Re: [PATCH v4 10/11] thermal: Simplify or eliminate unnecessary
 set_mode() methods
To:     Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc:     linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org,
        netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
        platform-driver-x86@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-renesas-soc@vger.kernel.org,
        linux-rockchip@lists.infradead.org,
        "Rafael J . Wysocki" <rjw@rjwysocki.net>,
        Len Brown <lenb@kernel.org>,
        Vishal Kulkarni <vishal@chelsio.com>,
        "David S . Miller" <davem@davemloft.net>,
        Jiri Pirko <jiri@mellanox.com>,
        Ido Schimmel <idosch@mellanox.com>,
        Johannes Berg <johannes.berg@intel.com>,
        Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
        Luca Coelho <luciano.coelho@intel.com>,
        Intel Linux Wireless <linuxwifi@intel.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        Peter Kaestle <peter@piie.net>,
        Darren Hart <dvhart@infradead.org>,
        Andy Shevchenko <andy@infradead.org>,
        Sebastian Reichel <sre@kernel.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
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        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        NXP Linux Team <linux-imx@nxp.com>,
        =?UTF-8?Q?Niklas_S=c3=b6derlund?= <niklas.soderlund@ragnatech.se>,
        Heiko Stuebner <heiko@sntech.de>,
        Orson Zhai <orsonzhai@gmail.com>,
        Baolin Wang <baolin.wang7@gmail.com>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        Zhang Rui <rui.zhang@intel.com>,
        Allison Randal <allison@lohutok.net>,
        Enrico Weigelt <info@metux.net>,
        Gayatri Kammela <gayatri.kammela@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>, kernel@collabora.com
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Message-ID: <4fb7bb2c-a61f-8dbc-c0da-31e6a72214e1@samsung.com>
Date:   Wed, 24 Jun 2020 12:03:09 +0200
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On 5/28/20 9:20 PM, Andrzej Pietrasiewicz wrote:
> Setting polling_delay is now done at thermal_core level (by not polling
> DISABLED devices), so no need to repeat this code.
> 
> int340x: Checking for an impossible enum value is unnecessary.
> acpi/thermal: It only prints debug messages.
> 
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>

Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> ---
>  drivers/acpi/thermal.c                        | 26 ----------------
>  .../ethernet/mellanox/mlxsw/core_thermal.c    | 30 -------------------
>  drivers/platform/x86/acerhdf.c                |  3 --
>  drivers/thermal/imx_thermal.c                 |  6 ----
>  .../intel/int340x_thermal/int3400_thermal.c   |  4 ---
>  drivers/thermal/thermal_of.c                  | 18 -----------
>  6 files changed, 87 deletions(-)
> 
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 52b6cda1bcc3..29a2b73fe035 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -525,31 +525,6 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp)
>  	return 0;
>  }
>  
> -static int thermal_set_mode(struct thermal_zone_device *thermal,
> -				enum thermal_device_mode mode)
> -{
> -	struct acpi_thermal *tz = thermal->devdata;
> -
> -	if (!tz)
> -		return -EINVAL;
> -
> -	if (mode != THERMAL_DEVICE_DISABLED &&
> -	    mode != THERMAL_DEVICE_ENABLED)
> -		return -EINVAL;
> -	/*
> -	 * enable/disable thermal management from ACPI thermal driver
> -	 */
> -	if (mode == THERMAL_DEVICE_DISABLED)
> -		pr_warn("thermal zone will be disabled\n");
> -
> -	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> -		"%s kernel ACPI thermal control\n",
> -		mode == THERMAL_DEVICE_ENABLED ?
> -		"Enable" : "Disable"));
> -
> -	return 0;
> -}
> -
>  static int thermal_get_trip_type(struct thermal_zone_device *thermal,
>  				 int trip, enum thermal_trip_type *type)
>  {
> @@ -836,7 +811,6 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
>  	.bind = acpi_thermal_bind_cooling_device,
>  	.unbind	= acpi_thermal_unbind_cooling_device,
>  	.get_temp = thermal_get_temp,
> -	.set_mode = thermal_set_mode,
>  	.get_trip_type = thermal_get_trip_type,
>  	.get_trip_temp = thermal_get_trip_temp,
>  	.get_crit_temp = thermal_get_crit_temp,
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> index e1d800be8bb4..c7f334383912 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> @@ -275,19 +275,6 @@ static int mlxsw_thermal_unbind(struct thermal_zone_device *tzdev,
>  	return 0;
>  }
>  
> -static int mlxsw_thermal_set_mode(struct thermal_zone_device *tzdev,
> -				  enum thermal_device_mode mode)
> -{
> -	struct mlxsw_thermal *thermal = tzdev->devdata;
> -
> -	if (mode == THERMAL_DEVICE_ENABLED)
> -		tzdev->polling_delay = thermal->polling_delay;
> -	else
> -		tzdev->polling_delay = 0;
> -
> -	return 0;
> -}
> -
>  static int mlxsw_thermal_get_temp(struct thermal_zone_device *tzdev,
>  				  int *p_temp)
>  {
> @@ -388,7 +375,6 @@ static int mlxsw_thermal_trend_get(struct thermal_zone_device *tzdev,
>  static struct thermal_zone_device_ops mlxsw_thermal_ops = {
>  	.bind = mlxsw_thermal_bind,
>  	.unbind = mlxsw_thermal_unbind,
> -	.set_mode = mlxsw_thermal_set_mode,
>  	.get_temp = mlxsw_thermal_get_temp,
>  	.get_trip_type	= mlxsw_thermal_get_trip_type,
>  	.get_trip_temp	= mlxsw_thermal_get_trip_temp,
> @@ -446,20 +432,6 @@ static int mlxsw_thermal_module_unbind(struct thermal_zone_device *tzdev,
>  	return err;
>  }
>  
> -static int mlxsw_thermal_module_mode_set(struct thermal_zone_device *tzdev,
> -					 enum thermal_device_mode mode)
> -{
> -	struct mlxsw_thermal_module *tz = tzdev->devdata;
> -	struct mlxsw_thermal *thermal = tz->parent;
> -
> -	if (mode == THERMAL_DEVICE_ENABLED)
> -		tzdev->polling_delay = thermal->polling_delay;
> -	else
> -		tzdev->polling_delay = 0;
> -
> -	return 0;
> -}
> -
>  static int mlxsw_thermal_module_temp_get(struct thermal_zone_device *tzdev,
>  					 int *p_temp)
>  {
> @@ -559,7 +531,6 @@ mlxsw_thermal_module_trip_hyst_set(struct thermal_zone_device *tzdev, int trip,
>  static struct thermal_zone_device_ops mlxsw_thermal_module_ops = {
>  	.bind		= mlxsw_thermal_module_bind,
>  	.unbind		= mlxsw_thermal_module_unbind,
> -	.set_mode	= mlxsw_thermal_module_mode_set,
>  	.get_temp	= mlxsw_thermal_module_temp_get,
>  	.get_trip_type	= mlxsw_thermal_module_trip_type_get,
>  	.get_trip_temp	= mlxsw_thermal_module_trip_temp_get,
> @@ -597,7 +568,6 @@ static int mlxsw_thermal_gearbox_temp_get(struct thermal_zone_device *tzdev,
>  static struct thermal_zone_device_ops mlxsw_thermal_gearbox_ops = {
>  	.bind		= mlxsw_thermal_module_bind,
>  	.unbind		= mlxsw_thermal_module_unbind,
> -	.set_mode	= mlxsw_thermal_module_mode_set,
>  	.get_temp	= mlxsw_thermal_gearbox_temp_get,
>  	.get_trip_type	= mlxsw_thermal_module_trip_type_get,
>  	.get_trip_temp	= mlxsw_thermal_module_trip_temp_get,
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> index 3efe749dc5a0..d33a70af0869 100644
> --- a/drivers/platform/x86/acerhdf.c
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -397,8 +397,6 @@ static inline void acerhdf_revert_to_bios_mode(void)
>  {
>  	acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
>  	kernelmode = 0;
> -	if (thz_dev)
> -		thz_dev->polling_delay = 0;
>  
>  	pr_notice("kernel mode fan control OFF\n");
>  }
> @@ -406,7 +404,6 @@ static inline void acerhdf_enable_kernelmode(void)
>  {
>  	kernelmode = 1;
>  
> -	thz_dev->polling_delay = interval*1000;
>  	pr_notice("kernel mode fan control ON\n");
>  }
>  
> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
> index 53abb1be1cba..a02398118d88 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -338,9 +338,6 @@ static int imx_set_mode(struct thermal_zone_device *tz,
>  	const struct thermal_soc_data *soc_data = data->socdata;
>  
>  	if (mode == THERMAL_DEVICE_ENABLED) {
> -		tz->polling_delay = IMX_POLLING_DELAY;
> -		tz->passive_delay = IMX_PASSIVE_DELAY;
> -
>  		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
>  			     soc_data->power_down_mask);
>  		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> @@ -356,9 +353,6 @@ static int imx_set_mode(struct thermal_zone_device *tz,
>  		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
>  			     soc_data->power_down_mask);
>  
> -		tz->polling_delay = 0;
> -		tz->passive_delay = 0;
> -
>  		if (data->irq_enabled) {
>  			disable_irq(data->irq);
>  			data->irq_enabled = false;
> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> index 8e8c9af7e5f4..9af862ab9f65 100644
> --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> @@ -386,10 +386,6 @@ static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
>  	if (!priv)
>  		return -EINVAL;
>  
> -	if (mode != THERMAL_DEVICE_ENABLED &&
> -	    mode != THERMAL_DEVICE_DISABLED)
> -		return -EINVAL;
> -
>  	if (mode != thermal->mode)
>  		result = int3400_thermal_run_osc(priv->adev->handle,
>  						priv->current_uuid_index,
> diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
> index 011fd7f0a01e..8a6272570347 100644
> --- a/drivers/thermal/thermal_of.c
> +++ b/drivers/thermal/thermal_of.c
> @@ -267,22 +267,6 @@ static int of_thermal_unbind(struct thermal_zone_device *thermal,
>  	return 0;
>  }
>  
> -static int of_thermal_set_mode(struct thermal_zone_device *tz,
> -			       enum thermal_device_mode mode)
> -{
> -	struct __thermal_zone *data = tz->devdata;
> -
> -	if (mode == THERMAL_DEVICE_ENABLED) {
> -		tz->polling_delay = data->polling_delay;
> -		tz->passive_delay = data->passive_delay;
> -	} else {
> -		tz->polling_delay = 0;
> -		tz->passive_delay = 0;
> -	}
> -
> -	return 0;
> -}
> -
>  static int of_thermal_get_trip_type(struct thermal_zone_device *tz, int trip,
>  				    enum thermal_trip_type *type)
>  {
> @@ -374,8 +358,6 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
>  }
>  
>  static struct thermal_zone_device_ops of_thermal_ops = {
> -	.set_mode = of_thermal_set_mode,
> -
>  	.get_trip_type = of_thermal_get_trip_type,
>  	.get_trip_temp = of_thermal_get_trip_temp,
>  	.set_trip_temp = of_thermal_set_trip_temp,
>