iwlwifi: mvm: rs: fix TLC statistics collection

Statistics should be collected according to the actual rate a
frame/aggregation was transmitted and not according to the initial rate
from the last LQ command (these rates are different if the frames were
retransmitted at a lower rate from the rate scale table).

This is needed to remove throughput degradation.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 65beca3a457a19d2dcd804d01a590f7404e04f65..8999a1199d60d27bdec88d6c638feb85403c3ced 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -1291,7 +1291,7 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
         * first index into rate scale table.
         */
        if (info->flags & IEEE80211_TX_STAT_AMPDU) {
-               rs_collect_tpc_data(mvm, lq_sta, curr_tbl, lq_rate.index,
+               rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
                                    info->status.ampdu_len,
                                    info->status.ampdu_ack_len,
                                    reduced_txp);
@@ -1312,7 +1312,7 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                if (info->status.ampdu_ack_len == 0)
                        info->status.ampdu_len = 1;
 
-               rs_collect_tlc_data(mvm, lq_sta, curr_tbl, lq_rate.index,
+               rs_collect_tlc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
                                    info->status.ampdu_len,
                                    info->status.ampdu_ack_len);
 
@@ -1348,11 +1348,11 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                                continue;
 
                        rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
-                                           lq_rate.index, 1,
+                                           tx_resp_rate.index, 1,
                                            i < retries ? 0 : legacy_success,
                                            reduced_txp);
                        rs_collect_tlc_data(mvm, lq_sta, tmp_tbl,
-                                           lq_rate.index, 1,
+                                           tx_resp_rate.index, 1,
                                            i < retries ? 0 : legacy_success);
                }