From 24047e2c4feb8c126e92cc5bb7a863115c89bd72 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Tue, 29 Mar 2011 13:43:14 +0200 Subject: carl9170: Fix tx aggregation problems with some clients Some clients seem to rely upon the reception of BlockAckReqs to flush their rx reorder buffer. In order to fix aggregation for these clients carl9170 should set IEEE80211_TX_STAT_AMPDU_NO_BACK to generate a BlockAckReq if the transmission of an AMPDU subframe fails. This fixes aggregation problems with Intel 5100 Windows STAs (and maybe others as well). Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/carl9170/carl9170.h | 1 + drivers/net/wireless/ath/carl9170/main.c | 1 + drivers/net/wireless/ath/carl9170/tx.c | 7 +++++++ 3 files changed, 9 insertions(+) (limited to 'drivers') diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h index c6a5fae634a..9cad061cc1d 100644 --- a/drivers/net/wireless/ath/carl9170/carl9170.h +++ b/drivers/net/wireless/ath/carl9170/carl9170.h @@ -443,6 +443,7 @@ struct carl9170_ba_stats { u8 ampdu_len; u8 ampdu_ack_len; bool clear; + bool req; }; struct carl9170_sta_info { diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c index ede3d7e5a04..89fe60accf8 100644 --- a/drivers/net/wireless/ath/carl9170/main.c +++ b/drivers/net/wireless/ath/carl9170/main.c @@ -1355,6 +1355,7 @@ static int carl9170_op_ampdu_action(struct ieee80211_hw *hw, tid_info = rcu_dereference(sta_info->agg[tid]); sta_info->stats[tid].clear = true; + sta_info->stats[tid].req = false; if (tid_info) { bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE); diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c index 0ef70b6fc51..cb70ed7ec5c 100644 --- a/drivers/net/wireless/ath/carl9170/tx.c +++ b/drivers/net/wireless/ath/carl9170/tx.c @@ -383,6 +383,7 @@ static void carl9170_tx_status_process_ampdu(struct ar9170 *ar, if (sta_info->stats[tid].clear) { sta_info->stats[tid].clear = false; + sta_info->stats[tid].req = false; sta_info->stats[tid].ampdu_len = 0; sta_info->stats[tid].ampdu_ack_len = 0; } @@ -391,10 +392,16 @@ static void carl9170_tx_status_process_ampdu(struct ar9170 *ar, if (txinfo->status.rates[0].count == 1) sta_info->stats[tid].ampdu_ack_len++; + if (!(txinfo->flags & IEEE80211_TX_STAT_ACK)) + sta_info->stats[tid].req = true; + if (super->f.mac_control & cpu_to_le16(AR9170_TX_MAC_IMM_BA)) { super->s.rix = sta_info->stats[tid].ampdu_len; super->s.cnt = sta_info->stats[tid].ampdu_ack_len; txinfo->flags |= IEEE80211_TX_STAT_AMPDU; + if (sta_info->stats[tid].req) + txinfo->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; + sta_info->stats[tid].clear = true; } spin_unlock_bh(&tid_info->lock); -- cgit v1.2.3