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>

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),
 };
 
 /**

drivers/net/wireless/iwlwifi/mvm/rx.c

@@ -516,6 +516,10 @@ int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
 		.mvm = 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));