iwlwifi: mvm: ignore temperature updates in the RX statistics notification

If the firmware sends spontaneous DTS notfications with the
temperature (indicated in a TLV), we can ignore the temperature we get
in the RX statistics notifications.  This prevents potentially
handling the same temperature change twice.  It also ignores
notifications with temperature equal to 0 that happens from time to
time.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
index 32e8b5bf2b3d..115e604e1ac9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
@@ -246,6 +246,7 @@ enum iwl_ucode_tlv_flag {
  *      the actual dwell time.
  * @IWL_UCODE_TLV_API_SCD_CFG: This firmware can configure the scheduler
  *      through the dedicated host command.
+ * @IWL_UCODE_TLV_API_ASYNC_DTM: Async temperature notifications are supported.
  */
 enum iwl_ucode_tlv_api {
         IWL_UCODE_TLV_API_BT_COEX_SPLIT         = BIT(3),
@@ -255,6 +256,7 @@ enum iwl_ucode_tlv_api {
         IWL_UCODE_TLV_API_FRAGMENTED_SCAN       = BIT(8),
         IWL_UCODE_TLV_API_BASIC_DWELL           = BIT(13),
         IWL_UCODE_TLV_API_SCD_CFG               = BIT(15),
+        IWL_UCODE_TLV_API_ASYNC_DTM             = BIT(17),
 };
 
 /**
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index 02e0f3703632..7919a7b00c7a 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -516,7 +516,11 @@ int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
                 .mvm = mvm,
         };
 
-        iwl_mvm_tt_temp_changed(mvm,
+        /* Only handle rx statistics temperature changes if async temp
+         * notifications are not supported
+         */
+        if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_ASYNC_DTM))
+                iwl_mvm_tt_temp_changed(mvm,
                                 le32_to_cpu(stats->general.radio_temperature));
 
         iwl_mvm_update_rx_statistics(mvm, stats);