ath9k: Revamp transmit control block

Use the ath_buf instance associated with each tx frame
directly and remove all redundant information in ath_tx_control.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 17 insertions, 6 deletions

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index b1b1e7f3b0b..839db2312ca 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -412,7 +412,7 @@ void ath_get_beaconconfig(struct ath_softc *sc,
 }
 
 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
-                     struct ath_xmit_status *tx_status, struct ath_node *an)
+                     struct ath_xmit_status *tx_status)
 {
         struct ieee80211_hw *hw = sc->hw;
         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
@@ -906,6 +906,7 @@ static int ath_attach(u16 devid,
         }
 
         hw->queues = 4;
+        hw->sta_data_size = sizeof(struct ath_node);
 
         /* Register rate control */
         hw->rate_control_algorithm = "ath9k_rate_control";
@@ -1016,9 +1017,12 @@ static int ath9k_start(struct ieee80211_hw *hw)
 static int ath9k_tx(struct ieee80211_hw *hw,
                     struct sk_buff *skb)
 {
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
         struct ath_softc *sc = hw->priv;
+        struct ath_tx_control txctl;
         int hdrlen, padsize;
-        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+        memset(&txctl, 0, sizeof(struct ath_tx_control));
 
         /*
          * As a temporary workaround, assign seq# here; this will likely need
@@ -1043,18 +1047,25 @@ static int ath9k_tx(struct ieee80211_hw *hw,
                 memmove(skb->data, skb->data + padsize, hdrlen);
         }
 
+        /* Check if a tx queue is available */
+
+        txctl.txq = ath_test_get_txq(sc, skb);
+        if (!txctl.txq)
+                goto exit;
+
         DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
                 __func__,
                 skb);
 
-        if (ath_tx_start(sc, skb) != 0) {
+        if (ath_tx_start(sc, skb, &txctl) != 0) {
                 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
-                dev_kfree_skb_any(skb);
-                /* FIXME: Check for proper return value from ATH_DEV */
-                return 0;
+                goto exit;
         }
 
         return 0;
+exit:
+        dev_kfree_skb_any(skb);
+        return 0;
 }
 
 static void ath9k_stop(struct ieee80211_hw *hw)