[RESEND][PATCH v1 0/5] thermal: Pass trip pointer to .set_trip_temp() callback

[RESEND][PATCH v1 0/5] thermal: Pass trip pointer to .set_trip_temp() callback

[Rafael J. Wysocki]

Hi Everyone,

This is a partial resend of the patch series at

https://lore.kernel.org/linux-pm/8409966.T7Z3S40VBb@kreacher/

that has not received much attention.

However, I would like to get at least some of it into 6.11 and we are
effectively 2 weeks away from the merge window.  I'd need to put them
into linux-next this week so they received at least some coverage there.

Since the majority of the original series is mostly unrelated changes in
different drivers which can wait, this is a smaller set of 5 patches
including the most significant change of the driver interface, which
to pass a trip pointer to the .set_trip_temp() zone callback.

Two of the other 4 patches are preparatory and the other 2 are cleanups,
one in the imx driver and one in the core, where the former is needed to
unlock the latter.

This series is based on the current thermal branch in linux-pm.git.

Thanks!

[RESEND][PATCH v1 1/5] thermal: helpers: Introduce thermal_trip_is_bound_to_cdev()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Introduce a new helper function thermal_trip_is_bound_to_cdev() for
checking whether or not a given trip point has been bound to a given
cooling device.

The primary user of it will be the Tegra thermal driver.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_helpers.c |   47 ++++++++++++++++++++++++++++----------
 include/linux/thermal.h           |    3 ++
 2 files changed, 38 insertions(+), 12 deletions(-)

Index: linux-pm/drivers/thermal/thermal_helpers.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_helpers.c
+++ linux-pm/drivers/thermal/thermal_helpers.c
@@ -39,30 +39,53 @@ int get_tz_trend(struct thermal_zone_dev
 	return trend;
 }
 
+static struct thermal_instance *get_instance(struct thermal_zone_device *tz,
+					     struct thermal_cooling_device *cdev,
+					     const struct thermal_trip *trip)
+{
+	struct thermal_instance *ti;
+
+	list_for_each_entry(ti, &tz->thermal_instances, tz_node) {
+		if (ti->trip == trip && ti->cdev == cdev)
+			return ti;
+	}
+
+	return NULL;
+}
+
+bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
+				   const struct thermal_trip *trip,
+				   struct thermal_cooling_device *cdev)
+{
+	bool ret;
+
+	mutex_lock(&tz->lock);
+	mutex_lock(&cdev->lock);
+
+	ret = !!get_instance(tz, cdev, trip);
+
+	mutex_unlock(&cdev->lock);
+	mutex_unlock(&tz->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(thermal_trip_is_bound_to_cdev);
+
 struct thermal_instance *
 get_thermal_instance(struct thermal_zone_device *tz,
 		     struct thermal_cooling_device *cdev, int trip_index)
 {
-	struct thermal_instance *pos = NULL;
-	struct thermal_instance *target_instance = NULL;
-	const struct thermal_trip *trip;
+	struct thermal_instance *ti;
 
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
 
-	trip = &tz->trips[trip_index].trip;
-
-	list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
-		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
-			target_instance = pos;
-			break;
-		}
-	}
+	ti = get_instance(tz, cdev, &tz->trips[trip_index].trip);
 
 	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
 
-	return target_instance;
+	return ti;
 }
 EXPORT_SYMBOL(get_thermal_instance);
 
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -269,6 +269,9 @@ struct thermal_zone_device *thermal_zone
 int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 int thermal_zone_get_slope(struct thermal_zone_device *tz);
 int thermal_zone_get_offset(struct thermal_zone_device *tz);
+bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
+				   const struct thermal_trip *trip,
+				   struct thermal_cooling_device *cdev);
 
 int thermal_zone_device_enable(struct thermal_zone_device *tz);
 int thermal_zone_device_disable(struct thermal_zone_device *tz);

[RESEND][PATCH v1 2/5] thermal: trip: Add conversion macros for thermal trip priv field

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Some drivers will need to store integers in the priv field of struct
thermal_trip, so add conversion macros for doing this in a consistent
way and switch over the int340x_thermal driver that already does it and
uses custom conversion functions to using the new macros.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c |   14 +----------
 include/linux/thermal.h                                      |    3 ++
 2 files changed, 5 insertions(+), 12 deletions(-)

Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -79,6 +79,9 @@ struct thermal_trip {
 #define THERMAL_TRIP_FLAG_RW	(THERMAL_TRIP_FLAG_RW_TEMP | \
 				 THERMAL_TRIP_FLAG_RW_HYST)
 
+#define THERMAL_TRIP_PRIV_TO_INT(_val_)	(uintptr_t)(_val_)
+#define THERMAL_INT_TO_TRIP_PRIV(_val_)	(void *)(uintptr_t)(_val_)
+
 struct thermal_zone_device;
 
 struct thermal_zone_device_ops {
Index: linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -62,16 +62,6 @@ static void int340x_thermal_critical(str
 		thermal_zone_device_type(zone));
 }
 
-static inline void *int_to_trip_priv(int i)
-{
-	return (void *)(long)i;
-}
-
-static inline int trip_priv_to_int(const struct thermal_trip *trip)
-{
-	return (long)trip->priv;
-}
-
 static int int340x_thermal_read_trips(struct acpi_device *zone_adev,
 				      struct thermal_trip *zone_trips,
 				      int trip_cnt)
@@ -106,7 +96,7 @@ static int int340x_thermal_read_trips(st
 			break;
 
 		zone_trips[trip_cnt].type = THERMAL_TRIP_ACTIVE;
-		zone_trips[trip_cnt].priv = int_to_trip_priv(i);
+		zone_trips[trip_cnt].priv = THERMAL_INT_TO_TRIP_PRIV(i);
 		trip_cnt++;
 	}
 
@@ -224,7 +214,7 @@ static int int340x_update_one_trip(struc
 		break;
 	case THERMAL_TRIP_ACTIVE:
 		err = thermal_acpi_active_trip_temp(zone_adev,
-						    trip_priv_to_int(trip),
+						    THERMAL_TRIP_PRIV_TO_INT(trip->priv),
 						    &temp);
 		break;
 	default:

[RESEND][PATCH v1 3/5] thermal: trip: Pass trip pointer to .set_trip_temp() thermal zone callback

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Out of several drivers implementing the .set_trip_temp() thermal zone
operation, two don't actually use the trip ID argument passed to it,
two call __thermal_zone_get_trip() to get a struct thermal_trip
corresponding to the given trip ID, and the other use the trip ID as an
index into their own data structures with the assumption that it will
always match the ordering of entries in the trips table passed to the
core during thermal zone registration, which is fragile and not really
guaranteed.

Even though the trip IDs used by the core are in fact their indices in the
trips table passed to it by the thermal zone creator, that is purely a
matter of convenience and should not be relied on for correctness.

For this reason, modify trip_point_temp_store() to pass a (const) trip
pointer to .set_trip_temp() and adjust the drivers implementing it
accordingly.

This helps to simplify the drivers invoking __thermal_zone_get_trip()
from their .set_trip_temp() callback functions because they will not
need to do it now and the other drivers can store their internal
trip indices in the priv field in struct thermal_trip and their
.set_trip_temp() callback functions can get those indices from there.

The intel_quark_dts thermal driver can instead use the trip type to
determine the requisite trip index.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/tt.c                          |    2 
 drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c         |    8 +--
 drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c |    3 -
 drivers/thermal/intel/intel_quark_dts_thermal.c                      |   26 +++++++---
 drivers/thermal/intel/intel_soc_dts_iosf.c                           |   15 +++--
 drivers/thermal/intel/x86_pkg_temp_thermal.c                         |    9 ++-
 drivers/thermal/qcom/qcom-spmi-temp-alarm.c                          |   10 +--
 drivers/thermal/tegra/soctherm.c                                     |   14 +----
 drivers/thermal/thermal_sysfs.c                                      |    2 
 include/linux/thermal.h                                              |    3 -
 10 files changed, 54 insertions(+), 38 deletions(-)

Index: linux-pm/drivers/thermal/thermal_sysfs.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_sysfs.c
+++ linux-pm/drivers/thermal/thermal_sysfs.c
@@ -113,7 +113,7 @@ trip_point_temp_store(struct device *dev
 
 	if (temp != trip->temperature) {
 		if (tz->ops.set_trip_temp) {
-			ret = tz->ops.set_trip_temp(tz, trip_id, temp);
+			ret = tz->ops.set_trip_temp(tz, trip, temp);
 			if (ret)
 				goto unlock;
 		}
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -93,7 +93,8 @@ struct thermal_zone_device_ops {
 	int (*set_trips) (struct thermal_zone_device *, int, int);
 	int (*change_mode) (struct thermal_zone_device *,
 		enum thermal_device_mode);
-	int (*set_trip_temp) (struct thermal_zone_device *, int, int);
+	int (*set_trip_temp) (struct thermal_zone_device *,
+			      const struct thermal_trip *, int);
 	int (*get_crit_temp) (struct thermal_zone_device *, int *);
 	int (*set_emul_temp) (struct thermal_zone_device *, int);
 	int (*get_trend) (struct thermal_zone_device *,
Index: linux-pm/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
===================================================================
--- linux-pm.orig/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ linux-pm/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -638,7 +638,7 @@ out:
 }
 
 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
-				       int trip, int temp)
+				       const struct thermal_trip *trip, int temp)
 {
 	struct iwl_mvm *mvm = thermal_zone_device_priv(device);
 	int ret;
Index: linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -39,13 +39,14 @@ static int int340x_thermal_get_zone_temp
 }
 
 static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,
-					 int trip, int temp)
+					 const struct thermal_trip *trip, int temp)
 {
 	struct int34x_thermal_zone *d = thermal_zone_device_priv(zone);
-	char name[] = {'P', 'A', 'T', '0' + trip, '\0'};
+	unsigned int trip_index = THERMAL_TRIP_PRIV_TO_INT(trip->priv);
+	char name[] = {'P', 'A', 'T', '0' + trip_index, '\0'};
 	acpi_status status;
 
-	if (trip > 9)
+	if (trip_index > 9)
 		return -EINVAL;
 
 	status = acpi_execute_simple_method(d->adev->handle, name,
@@ -144,6 +145,7 @@ struct int34x_thermal_zone *int340x_ther
 		zone_trips[i].type = THERMAL_TRIP_PASSIVE;
 		zone_trips[i].temperature = THERMAL_TEMP_INVALID;
 		zone_trips[i].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
+		zone_trips[i].priv = THERMAL_INT_TO_TRIP_PRIV(i);
 	}
 
 	trip_cnt = int340x_thermal_read_trips(adev, zone_trips, trip_cnt);
Index: linux-pm/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ linux-pm/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -225,7 +225,8 @@ static int sys_get_curr_temp(struct ther
 	return 0;
 }
 
-static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
+static int sys_set_trip_temp(struct thermal_zone_device *tzd,
+			     const struct thermal_trip *trip, int temp)
 {
 	struct proc_thermal_pci *pci_info = thermal_zone_device_priv(tzd);
 	int tjmax, _temp;
Index: linux-pm/drivers/thermal/intel/intel_quark_dts_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ linux-pm/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -195,7 +195,7 @@ static int get_trip_temp(int trip)
 }
 
 static int update_trip_temp(struct soc_sensor_entry *aux_entry,
-				int trip, int temp)
+				int trip_index, int temp)
 {
 	u32 out;
 	u32 temp_out;
@@ -230,9 +230,9 @@ static int update_trip_temp(struct soc_s
 	 */
 	temp_out = temp + QRK_DTS_TEMP_BASE;
 	out = (store_ptps & ~(QRK_DTS_MASK_TP_THRES <<
-		(trip * QRK_DTS_SHIFT_TP)));
+		(trip_index * QRK_DTS_SHIFT_TP)));
 	out |= (temp_out & QRK_DTS_MASK_TP_THRES) <<
-		(trip * QRK_DTS_SHIFT_TP);
+		(trip_index * QRK_DTS_SHIFT_TP);
 
 	ret = iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE,
 			     QRK_DTS_REG_OFFSET_PTPS, out);
@@ -242,10 +242,24 @@ failed:
 	return ret;
 }
 
-static inline int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
-				int temp)
+static inline int sys_set_trip_temp(struct thermal_zone_device *tzd,
+				    const struct thermal_trip *trip,
+				    int temp)
 {
-	return update_trip_temp(thermal_zone_device_priv(tzd), trip, temp);
+	unsigned int trip_index;
+
+	switch (trip->type) {
+	case THERMAL_TRIP_HOT:
+		trip_index = QRK_DTS_ID_TP_HOT;
+		break;
+	case THERMAL_TRIP_CRITICAL:
+		trip_index = QRK_DTS_ID_TP_CRITICAL;
+		break;
+	default
+		return -EINVAL;
+	}
+
+	return update_trip_temp(thermal_zone_device_priv(tzd), trip_index, temp);
 }
 
 static int sys_get_curr_temp(struct thermal_zone_device *tzd,
Index: linux-pm/drivers/thermal/intel/intel_soc_dts_iosf.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ linux-pm/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -129,18 +129,20 @@ err_restore_ptps:
 	return status;
 }
 
-static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
+static int sys_set_trip_temp(struct thermal_zone_device *tzd,
+			     const struct thermal_trip *trip,
 			     int temp)
 {
 	struct intel_soc_dts_sensor_entry *dts = thermal_zone_device_priv(tzd);
 	struct intel_soc_dts_sensors *sensors = dts->sensors;
+	unsigned int trip_index = THERMAL_TRIP_PRIV_TO_INT(trip->priv);
 	int status;
 
 	if (temp > sensors->tj_max)
 		return -EINVAL;
 
 	mutex_lock(&sensors->dts_update_lock);
-	status = update_trip_temp(sensors, trip, temp);
+	status = update_trip_temp(sensors, trip_index, temp);
 	mutex_unlock(&sensors->dts_update_lock);
 
 	return status;
@@ -293,11 +295,12 @@ static void dts_trips_reset(struct intel
 }
 
 static void set_trip(struct thermal_trip *trip, enum thermal_trip_type type,
-		     u8 flags, int temp)
+		     u8 flags, int temp, unsigned int index)
 {
 	trip->type = type;
 	trip->flags = flags;
 	trip->temperature = temp;
+	trip->priv = THERMAL_INT_TO_TRIP_PRIV(index);
 }
 
 struct intel_soc_dts_sensors *
@@ -332,7 +335,7 @@ intel_soc_dts_iosf_init(enum intel_soc_d
 		sensors->soc_dts[i].sensors = sensors;
 
 		set_trip(&trips[i][0], THERMAL_TRIP_PASSIVE,
-			 THERMAL_TRIP_FLAG_RW_TEMP, 0);
+			 THERMAL_TRIP_FLAG_RW_TEMP, 0, 0);
 
 		ret = update_trip_temp(sensors, 0, 0);
 		if (ret)
@@ -340,10 +343,10 @@ intel_soc_dts_iosf_init(enum intel_soc_d
 
 		if (critical_trip) {
 			temp = sensors->tj_max - crit_offset;
-			set_trip(&trips[i][1], THERMAL_TRIP_CRITICAL, 0, temp);
+			set_trip(&trips[i][1], THERMAL_TRIP_CRITICAL, 0, temp, 1);
 		} else {
 			set_trip(&trips[i][1], THERMAL_TRIP_PASSIVE,
-				 THERMAL_TRIP_FLAG_RW_TEMP, 0);
+				 THERMAL_TRIP_FLAG_RW_TEMP, 0, 1);
 			temp = 0;
 		}
 
Index: linux-pm/drivers/thermal/intel/x86_pkg_temp_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ linux-pm/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -119,9 +119,11 @@ static int sys_get_curr_temp(struct ther
 }
 
 static int
-sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
+sys_set_trip_temp(struct thermal_zone_device *tzd,
+		  const struct thermal_trip *trip, int temp)
 {
 	struct zone_device *zonedev = thermal_zone_device_priv(tzd);
+	unsigned int trip_index = THERMAL_TRIP_PRIV_TO_INT(trip->priv);
 	u32 l, h, mask, shift, intr;
 	int tj_max, val, ret;
 
@@ -132,7 +134,7 @@ sys_set_trip_temp(struct thermal_zone_de
 
 	val = (tj_max - temp)/1000;
 
-	if (trip >= MAX_NUMBER_OF_TRIPS || val < 0 || val > 0x7f)
+	if (trip_index >= MAX_NUMBER_OF_TRIPS || val < 0 || val > 0x7f)
 		return -EINVAL;
 
 	ret = rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,
@@ -140,7 +142,7 @@ sys_set_trip_temp(struct thermal_zone_de
 	if (ret < 0)
 		return ret;
 
-	if (trip) {
+	if (trip_index) {
 		mask = THERM_MASK_THRESHOLD1;
 		shift = THERM_SHIFT_THRESHOLD1;
 		intr = THERM_INT_THRESHOLD1_ENABLE;
@@ -296,6 +298,7 @@ static int pkg_temp_thermal_trips_init(i
 
 		trips[i].type = THERMAL_TRIP_PASSIVE;
 		trips[i].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
+		trips[i].priv = THERMAL_INT_TO_TRIP_PRIV(i);
 
 		pr_debug("%s: cpu=%d, trip=%d, temp=%d\n",
 			 __func__, cpu, i, trips[i].temperature);
Index: linux-pm/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
===================================================================
--- linux-pm.orig/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
+++ linux-pm/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
@@ -261,17 +261,13 @@ skip:
 	return qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg);
 }
 
-static int qpnp_tm_set_trip_temp(struct thermal_zone_device *tz, int trip_id, int temp)
+static int qpnp_tm_set_trip_temp(struct thermal_zone_device *tz,
+				 const struct thermal_trip *trip, int temp)
 {
 	struct qpnp_tm_chip *chip = thermal_zone_device_priv(tz);
-	struct thermal_trip trip;
 	int ret;
 
-	ret = __thermal_zone_get_trip(chip->tz_dev, trip_id, &trip);
-	if (ret)
-		return ret;
-
-	if (trip.type != THERMAL_TRIP_CRITICAL)
+	if (trip->type != THERMAL_TRIP_CRITICAL)
 		return 0;
 
 	mutex_lock(&chip->lock);
Index: linux-pm/drivers/thermal/tegra/soctherm.c
===================================================================
--- linux-pm.orig/drivers/thermal/tegra/soctherm.c
+++ linux-pm/drivers/thermal/tegra/soctherm.c
@@ -582,11 +582,11 @@ static int tsensor_group_thermtrip_get(s
 	return temp;
 }
 
-static int tegra_thermctl_set_trip_temp(struct thermal_zone_device *tz, int trip_id, int temp)
+static int tegra_thermctl_set_trip_temp(struct thermal_zone_device *tz,
+					const struct thermal_trip *trip, int temp)
 {
 	struct tegra_thermctl_zone *zone = thermal_zone_device_priv(tz);
 	struct tegra_soctherm *ts = zone->ts;
-	struct thermal_trip trip;
 	const struct tegra_tsensor_group *sg = zone->sg;
 	struct device *dev = zone->dev;
 	int ret;
@@ -594,11 +594,7 @@ static int tegra_thermctl_set_trip_temp(
 	if (!tz)
 		return -EINVAL;
 
-	ret = __thermal_zone_get_trip(tz, trip_id, &trip);
-	if (ret)
-		return ret;
-
-	if (trip.type == THERMAL_TRIP_CRITICAL) {
+	if (trip->type == THERMAL_TRIP_CRITICAL) {
 		/*
 		 * If thermtrips property is set in DT,
 		 * doesn't need to program critical type trip to HW,
@@ -609,7 +605,7 @@ static int tegra_thermctl_set_trip_temp(
 		else
 			return 0;
 
-	} else if (trip.type == THERMAL_TRIP_HOT) {
+	} else if (trip->type == THERMAL_TRIP_HOT) {
 		int i;
 
 		for (i = 0; i < THROTTLE_SIZE; i++) {
@@ -620,7 +616,7 @@ static int tegra_thermctl_set_trip_temp(
 				continue;
 
 			cdev = ts->throt_cfgs[i].cdev;
-			if (get_thermal_instance(tz, cdev, trip_id))
+			if (thermal_trip_is_bound_to_cdev(tz, trip, cdev))
 				stc = find_throttle_cfg_by_name(ts, cdev->type);
 			else
 				continue;

[RESEND][PATCH v1 4/5] thermal: imx: Drop critical trip check from imx_set_trip_temp()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Because the IMX thermal driver does not flag its critical trip as
writable, imx_set_trip_temp() will never be invoked for it and so the
critical trip check can be dropped from there.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/imx_thermal.c |    9 ---------
 1 file changed, 9 deletions(-)

Index: linux-pm/drivers/thermal/imx_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/imx_thermal.c
+++ linux-pm/drivers/thermal/imx_thermal.c
@@ -335,21 +335,12 @@ static int imx_set_trip_temp(struct ther
 			     int temp)
 {
 	struct imx_thermal_data *data = thermal_zone_device_priv(tz);
-	struct thermal_trip trip;
 	int ret;
 
 	ret = pm_runtime_resume_and_get(data->dev);
 	if (ret < 0)
 		return ret;
 
-	ret = __thermal_zone_get_trip(tz, trip_id, &trip);
-	if (ret)
-		return ret;
-
-	/* do not allow changing critical threshold */
-	if (trip.type == THERMAL_TRIP_CRITICAL)
-		return -EPERM;
-
 	/* do not allow passive to be set higher than critical */
 	if (temp < 0 || temp > trips[IMX_TRIP_CRITICAL].temperature)
 		return -EINVAL;

[RESEND][PATCH v1 5/5] thermal: trip: Fold __thermal_zone_get_trip() into its caller

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Because __thermal_zone_get_trip() is only called by thermal_zone_get_trip()
now, fold the former into the latter.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_trip.c |   18 ++++--------------
 include/linux/thermal.h        |    2 --
 2 files changed, 4 insertions(+), 16 deletions(-)

Index: linux-pm/drivers/thermal/thermal_trip.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_trip.c
+++ linux-pm/drivers/thermal/thermal_trip.c
@@ -114,27 +114,17 @@ void thermal_zone_set_trips(struct therm
 		dev_err(&tz->device, "Failed to set trips: %d\n", ret);
 }
 
-int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
-			    struct thermal_trip *trip)
-{
-	if (!tz || trip_id < 0 || trip_id >= tz->num_trips || !trip)
-		return -EINVAL;
-
-	*trip = tz->trips[trip_id].trip;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(__thermal_zone_get_trip);
-
 int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
 			  struct thermal_trip *trip)
 {
-	int ret;
+	if (!tz || !trip || trip_id < 0 || trip_id >= tz->num_trips)
+		return -EINVAL;
 
 	mutex_lock(&tz->lock);
-	ret = __thermal_zone_get_trip(tz, trip_id, trip);
+	*trip = tz->trips[trip_id].trip;
 	mutex_unlock(&tz->lock);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(thermal_zone_get_trip);
 
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -202,8 +202,6 @@ static inline void devm_thermal_of_zone_
 }
 #endif
 
-int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
-			    struct thermal_trip *trip);
 int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
 			  struct thermal_trip *trip);
 int for_each_thermal_trip(struct thermal_zone_device *tz,

Re: [RESEND][PATCH v1 3/5] thermal: trip: Pass trip pointer to .set_trip_temp() thermal zone callback

[Johannes Berg]

You said in the cover letter this hasn't received much attention ... as
far as I can tell, the only wireless thing is this:

> --- linux-pm.orig/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> +++ linux-pm/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> @@ -638,7 +638,7 @@ out:
>  }
>  
>  static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
> -				       int trip, int temp)
> +				       const struct thermal_trip *trip, int temp)
>  {
>  	struct iwl_mvm *mvm = thermal_zone_device_priv(device);
>  	int ret;

which I guess looks totally fine :)

johannes

Re: [RESEND][PATCH v1 3/5] thermal: trip: Pass trip pointer to .set_trip_temp() thermal zone callback

[Rafael J. Wysocki]

On Wed, Jul 3, 2024 at 10:43 AM Johannes Berg <johannes@sipsolutions.net> wrote:
>
> You said in the cover letter this hasn't received much attention ... as
> far as I can tell, the only wireless thing is this:
>
> > --- linux-pm.orig/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> > +++ linux-pm/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> > @@ -638,7 +638,7 @@ out:
> >  }
> >
> >  static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
> > -                                    int trip, int temp)
> > +                                    const struct thermal_trip *trip, int temp)
> >  {
> >       struct iwl_mvm *mvm = thermal_zone_device_priv(device);
> >       int ret;
>
> which I guess looks totally fine :)

Well, I would think so. :-)

Thanks!

Re: [RESEND][PATCH v1 4/5] thermal: imx: Drop critical trip check from imx_set_trip_temp()

[Daniel Lezcano]

On 02/07/2024 16:43, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> Because the IMX thermal driver does not flag its critical trip as
> writable, imx_set_trip_temp() will never be invoked for it and so the
> critical trip check can be dropped from there.

And as a rule of thumb, we should not allow writing the critical trip 
point temperature in the thermal core code.

> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>   drivers/thermal/imx_thermal.c |    9 ---------
>   1 file changed, 9 deletions(-)
> 
> Index: linux-pm/drivers/thermal/imx_thermal.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/imx_thermal.c
> +++ linux-pm/drivers/thermal/imx_thermal.c
> @@ -335,21 +335,12 @@ static int imx_set_trip_temp(struct ther
>   			     int temp)
>   {
>   	struct imx_thermal_data *data = thermal_zone_device_priv(tz);
> -	struct thermal_trip trip;
>   	int ret;
>   
>   	ret = pm_runtime_resume_and_get(data->dev);
>   	if (ret < 0)
>   		return ret;
>   
> -	ret = __thermal_zone_get_trip(tz, trip_id, &trip);
> -	if (ret)
> -		return ret;
> -
> -	/* do not allow changing critical threshold */
> -	if (trip.type == THERMAL_TRIP_CRITICAL)
> -		return -EPERM;
> -
>   	/* do not allow passive to be set higher than critical */
>   	if (temp < 0 || temp > trips[IMX_TRIP_CRITICAL].temperature)
>   		return -EINVAL;
> 
> 
> 

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