ath9k: Use straightforward PCI routines to setup the TX buffer.

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

1 files changed, 7 insertions, 16 deletions

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 4c9a03ed8382..50d4105ee4b3 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -1646,7 +1646,7 @@ static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
 }
 
 static void ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
-                                struct sk_buff *skb, struct scatterlist *sg,
+                                struct sk_buff *skb,
                                 struct ath_tx_control *txctl)
 {
         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
@@ -1711,7 +1711,6 @@ static void ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
 
 /* FIXME: tx power */
 static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
-                             struct scatterlist *sg, u32 n_sg,
                              struct ath_tx_control *txctl)
 {
         struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
@@ -1740,10 +1739,10 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
                                bf->bf_keyix, bf->bf_keytype, bf->bf_flags);
 
         ath9k_hw_filltxdesc(ah, ds,
-                            sg_dma_len(sg),             /* segment length */
-                            true,                       /* first segment */
-                            (n_sg == 1) ? true : false, /* last segment */
-                            ds);                        /* first descriptor */
+                            skb->len,   /* segment length */
+                            true,       /* first segment */
+                            true,       /* last segment */
+                            ds);        /* first descriptor */
 
         bf->bf_lastfrm = bf;
 
@@ -1783,7 +1782,6 @@ int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
                  struct ath_tx_control *txctl)
 {
         struct ath_buf *bf;
-        struct scatterlist sg;
 
         /* Check if a tx buffer is available */
 
@@ -1794,15 +1792,8 @@ int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
                 return -1;
         }
 
-        ath_tx_setup_buffer(sc, bf, skb, &sg, txctl);
-
-        /* Setup S/G */
-
-        memset(&sg, 0, sizeof(struct scatterlist));
-        sg_dma_address(&sg) = bf->bf_dmacontext;
-        sg_dma_len(&sg) = skb->len;
-
-        ath_tx_start_dma(sc, bf, &sg, 1, txctl);
+        ath_tx_setup_buffer(sc, bf, skb, txctl);
+        ath_tx_start_dma(sc, bf, txctl);
 
         return 0;
 }