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iwlwifi: mvm: Populate trip table before registering thermal zone

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The trip table in iwl_mvm_thermal_zone_register() is populated after
passing it to thermal_zone_device_register_with_trips(), so it may be
accessed (for instance, via sysfs) before it is ready.

To prevent that from happening, modify the function to populate the
trip table before calling thermal_zone_device_register_with_trips().

Also make the code use THERMAL_TEMP_INVALID as the "invalid temperature"
value which is also meaningful for the core.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Miri Korenblit <Miriam.rachel.korenblit@intel.com>
This commit is contained in:
Rafael J. Wysocki 2024-02-07 20:10:24 +01:00
parent 2e171a57c3
commit 61d8843754
1 changed files with 9 additions and 10 deletions
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19
drivers/net/wireless/intel/iwlwifi/mvm/tt.c
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@ -575,7 +575,7 @@ int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
/* compress trips to cmd array, remove uninitialized values*/
for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
if (mvm->tz_device.trips[i].temperature != INT_MIN) {
if (mvm->tz_device.trips[i].temperature != THERMAL_TEMP_INVALID) {
cmd.thresholds[idx++] =
cpu_to_le16((s16)(mvm->tz_device.trips[i].temperature / 1000));
}
@ -675,6 +675,14 @@ static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
/*
* 0 is a valid temperature,
* so initialize the array with S16_MIN which invalid temperature
*/
for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
mvm->tz_device.trips[i].temperature = THERMAL_TEMP_INVALID;
mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
}
mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
mvm->tz_device.trips,
IWL_MAX_DTS_TRIPS,
@ -693,15 +701,6 @@ static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
if (ret) {
IWL_DEBUG_TEMP(mvm, "Failed to enable thermal zone\n");
thermal_zone_device_unregister(mvm->tz_device.tzone);
return;
}
/* 0 is a valid temperature,
* so initialize the array with S16_MIN which invalid temperature
*/
for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
mvm->tz_device.trips[i].temperature = INT_MIN;
mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
}
}