iwlwifi: set AMPDU status variables correctly

The TX status code is currently abusing the ampdu_ack_map field (a bitmap) to
count the number of successfully received frames.  The comments in mac80211.h
show there are actually three different, relevant variables, of which we are
currently using two, both incorrectly. Fix this by making

- ampdu_ack_len -> the number of ACKed frames (i.e. successes)
- ampdu_ack_map -> the bitmap
- ampdu_len -> the total number of frames sent (i.e., attempts)

to match the header file (and verified with ath9k's usage) and updating Intel's
RS code to match.

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

2 files changed, 8 insertions, 7 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 8f8d5e3e688d..f01f242659c3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -867,14 +867,14 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
                 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
                                 &rs_index);
                 rs_collect_tx_data(curr_tbl, rs_index,
-                                   info->status.ampdu_ack_len,
-                                   info->status.ampdu_ack_map);
+                                   info->status.ampdu_len,
+                                   info->status.ampdu_ack_len);
 
                 /* Update success/fail counts if not searching for new mode */
                 if (lq_sta->stay_in_tbl) {
-                        lq_sta->total_success += info->status.ampdu_ack_map;
-                        lq_sta->total_failed += (info->status.ampdu_ack_len -
-                                        info->status.ampdu_ack_map);
+                        lq_sta->total_success += info->status.ampdu_ack_len;
+                        lq_sta->total_failed += (info->status.ampdu_len -
+                                        info->status.ampdu_ack_len);
                 }
         } else {
         /*
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
index 95e263f1d117..c2a5c85542bf 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
@@ -1233,8 +1233,9 @@ static int iwlagn_tx_status_reply_compressed_ba(struct iwl_priv *priv,
         memset(&info->status, 0, sizeof(info->status));
         info->flags |= IEEE80211_TX_STAT_ACK;
         info->flags |= IEEE80211_TX_STAT_AMPDU;
-        info->status.ampdu_ack_map = successes;
-        info->status.ampdu_ack_len = agg->frame_count;
+        info->status.ampdu_ack_len = successes;
+        info->status.ampdu_ack_map = bitmap;
+        info->status.ampdu_len = agg->frame_count;
         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, info);
 
         IWL_DEBUG_TX_REPLY(priv, "Bitmap %llx\n", (unsigned long long)bitmap);