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ath9k: Fix bug in TX aggregation 

mac80211 expects the driver to fill in the starting
sequence number of an ADDBA request to initiate TX aggregation.
IEEE80211_TX_CTL_AMPDU would be set for frames only after a
successful ADDBA exchange, but we have to increment the
internal sequence counter for the normal(non-AMPDU) data frames proerly.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith 2009-03-09 09:31:57 +05:30 committed by John W. Linville
parent 9c81e8be23
commit c37452b068
1 changed files with 33 additions and 16 deletions
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49
drivers/net/wireless/ath9k/xmit.c
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@ -55,9 +55,9 @@ static u32 bits_per_symbol[][2] = {
#define IS_HT_RATE(_rate) ((_rate) & 0x80)
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head);
static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head);
static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
struct list_head *bf_q,
int txok, int sendbar);
@ -152,7 +152,7 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
ASSERT(!bf_isretried(bf));
list_move_tail(&bf->list, &bf_head);
ath_tx_send_normal(sc, txq, tid, &bf_head);
ath_tx_send_ht_normal(sc, txq, tid, &bf_head);
}
spin_unlock_bh(&txq->axq_lock);
@ -1238,9 +1238,9 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
ath_tx_txqaddbuf(sc, txctl->txq, bf_head);
}
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head)
static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head)
{
struct ath_buf *bf;
@ -1256,6 +1256,19 @@ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
ath_tx_txqaddbuf(sc, txq, bf_head);
}
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
struct list_head *bf_head)
{
struct ath_buf *bf;
bf = list_first_entry(bf_head, struct ath_buf, list);
bf->bf_lastbf = bf;
bf->bf_nframes = 1;
ath_buf_set_rate(sc, bf);
ath_tx_txqaddbuf(sc, txq, bf_head);
}
static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr;
@ -1522,8 +1535,7 @@ static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf,
bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
if ((conf_is_ht(&sc->hw->conf) && !is_pae(skb) &&
(tx_info->flags & IEEE80211_TX_CTL_AMPDU)))
if (conf_is_ht(&sc->hw->conf) && !is_pae(skb))
bf->bf_state.bf_type |= BUF_HT;
bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq);
@ -1560,14 +1572,17 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
{
struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ath_node *an = NULL;
struct list_head bf_head;
struct ath_desc *ds;
struct ath_atx_tid *tid;
struct ath_hw *ah = sc->sc_ah;
int frm_type;
__le16 fc;
frm_type = get_hw_packet_type(skb);
fc = hdr->frame_control;
INIT_LIST_HEAD(&bf_head);
list_add_tail(&bf->list, &bf_head);
@ -1592,6 +1607,11 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
an = (struct ath_node *)tx_info->control.sta->drv_priv;
tid = ATH_AN_2_TID(an, bf->bf_tidno);
if (!ieee80211_is_data_qos(fc)) {
ath_tx_send_normal(sc, txctl->txq, &bf_head);
goto tx_done;
}
if (ath_aggr_query(sc, an, bf->bf_tidno)) {
/*
* Try aggregation if it's a unicast data frame
@ -1603,17 +1623,14 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
* Send this frame as regular when ADDBA
* exchange is neither complete nor pending.
*/
ath_tx_send_normal(sc, txctl->txq,
tid, &bf_head);
ath_tx_send_ht_normal(sc, txctl->txq,
tid, &bf_head);
}
} else {
bf->bf_lastbf = bf;
bf->bf_nframes = 1;
ath_buf_set_rate(sc, bf);
ath_tx_txqaddbuf(sc, txctl->txq, &bf_head);
ath_tx_send_normal(sc, txctl->txq, &bf_head);
}
tx_done:
spin_unlock_bh(&txctl->txq->axq_lock);
}