thermal: trip: Pass trip pointer to .set_trip_temp() thermal zone callback

Out of several drivers implementing the .set_trip_temp() thermal zone
operation, three 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>
Link: https://patch.msgid.link/8392906.T7Z3S40VBb@rjwysocki.net
[ rjw: Add missing colon and 2 empty code lines ]
[ rjw: Add missing change in imx_thermal.c and adjust the changelog ]
[ rjw: Drop an unused local variable ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

11 files changed, 58 insertions, 41 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index 61a4638d1be2..f8b08f98daa0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/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;
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index c90f28ee4698..6ad97309bc0a 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -331,8 +331,8 @@ static int imx_change_mode(struct thermal_zone_device *tz,
 	return 0;
 }
 
-static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip_id,
-			     int temp)
+static int imx_set_trip_temp(struct thermal_zone_device *tz,
+			     const struct thermal_trip *trip, int temp)
 {
 	struct imx_thermal_data *data = thermal_zone_device_priv(tz);
 	int ret;
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
index cd28a5582a60..31ed338eb83c 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -39,13 +39,14 @@ static int int340x_thermal_get_zone_temp(struct thermal_zone_device *zone,
 }
 
 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_thermal_zone_add(struct acpi_device *adev,
 		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);
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index 4a1bfebb1b8e..4f41fe543340 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -194,7 +194,8 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
 	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;
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index ec6ad26027bc..47296a14db3c 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/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_sensor_entry *aux_entry,
 	 */
 	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 +242,26 @@ 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,
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index 7adf942665d4..43a29551ba17 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/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_soc_dts_sensors *sensors, int dts_index
 }
 
 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_dts_interrupt_type intr_type,
 		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_dts_interrupt_type intr_type,
 
 		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;
 		}
 
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index c0ca8e3ff2e7..65b33b56a9be 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -119,9 +119,11 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
 }
 
 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_device *tzd, int trip, int temp)
 
 	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_device *tzd, int trip, int temp)
 	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(int cpu, int tj_max,
 
 		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);
diff --git a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
index 3cd74f6cac8f..96daad28b0c0 100644
--- a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
+++ b/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);
diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index e7fe8683bfc5..d3dfc34c62c6 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -582,23 +582,18 @@ static int tsensor_group_thermtrip_get(struct tegra_soctherm *ts, int id)
 	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;
 
 	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 +604,7 @@ static int tegra_thermctl_set_trip_temp(struct thermal_zone_device *tz, int trip
 		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 +615,7 @@ static int tegra_thermctl_set_trip_temp(struct thermal_zone_device *tz, int trip
 				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;
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 434b577950be..72b302bf914e 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -113,7 +113,7 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 
 	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;
 		}
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 3bd1b361ec34..cdd9c722cda2 100644
--- a/include/linux/thermal.h
+++ b/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 *,