ath9k: move seqno allocation in the tx path to ath_tx_setup_buffer

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index e3eeca9..bd52361 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1717,17 +1717,19 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len)
 
 }
 
-static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw,
+static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
                                           struct ath_txq *txq,
+                                          struct ath_atx_tid *tid,
                                           struct sk_buff *skb)
 {
-       struct ath_softc *sc = hw->priv;
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_frame_info *fi = get_frame_info(skb);
+       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct ath_buf *bf;
        struct ath_desc *ds;
        int frm_type;
+       u16 seqno;
 
        bf = ath_tx_get_buffer(sc);
        if (!bf) {
@@ -1737,6 +1739,13 @@ static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw,
 
        ATH_TXBUF_RESET(bf);
 
+       if (tid) {
+               seqno = tid->seq_next;
+               hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT);
+               INCR(tid->seq_next, IEEE80211_SEQ_MAX);
+               bf->bf_state.seqno = seqno;
+       }
+
        bf->bf_flags = setup_tx_flags(skb);
        bf->bf_mpdu = skb;
 
@@ -1773,15 +1782,15 @@ static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw,
 }
 
 /* FIXME: tx power */
-static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
+static int ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
                             struct ath_tx_control *txctl)
 {
-       struct sk_buff *skb = bf->bf_mpdu;
        struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct list_head bf_head;
        struct ath_atx_tid *tid = NULL;
-       u16 seqno;
+       struct ath_buf *bf;
+       int ret = 0;
        u8 tidno;
 
        spin_lock_bh(&txctl->txq->axq_lock);
@@ -1791,15 +1800,15 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
                        IEEE80211_QOS_CTL_TID_MASK;
                tid = ATH_AN_2_TID(txctl->an, tidno);
 
-               seqno = tid->seq_next;
-               hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT);
-               INCR(tid->seq_next, IEEE80211_SEQ_MAX);
-
-               bf->bf_state.seqno = seqno;
-
                WARN_ON(tid->ac->txq != txctl->txq);
        }
 
+       bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
+       if (unlikely(!bf)) {
+               ret = -ENOMEM;
+               goto out;
+       }
+
        if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
                /*
                 * Try aggregation if it's a unicast data frame
@@ -1825,7 +1834,9 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
                ath_tx_send_normal(sc, txctl->txq, tid, &bf_head);
        }
 
+out:
        spin_unlock_bh(&txctl->txq->axq_lock);
+       return ret;
 }
 
 /* Upon failure caller should free skb */
@@ -1838,7 +1849,6 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
        struct ieee80211_vif *vif = info->control.vif;
        struct ath_softc *sc = hw->priv;
        struct ath_txq *txq = txctl->txq;
-       struct ath_buf *bf;
        int padpos, padsize;
        int frmlen = skb->len + FCS_LEN;
        int q;
@@ -1885,10 +1895,6 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
         * info are no longer valid (overwritten by the ath_frame_info data.
         */
 
-       bf = ath_tx_setup_buffer(hw, txctl->txq, skb);
-       if (unlikely(!bf))
-               return -ENOMEM;
-
        q = skb_get_queue_mapping(skb);
        spin_lock_bh(&txq->axq_lock);
        if (txq == sc->tx.txq_map[q] &&
@@ -1898,9 +1904,7 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
        }
        spin_unlock_bh(&txq->axq_lock);
 
-       ath_tx_start_dma(sc, bf, txctl);
-
-       return 0;
+       return ath_tx_start_dma(sc, skb, txctl);
 }
 
 /*****************/