rt2x00: Add skb descriptor

Use the skb->cb field to add a frame description that can be used
to transfer information passed each rt2x00 layer. This reduces the
required arguments for rt2x00lib_write_tx_desc().

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 7 deletions

diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 49180de321e4..8093a4d49335 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1965,6 +1965,9 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
                           struct ieee80211_tx_control *control)
 {
         struct rt2x00_dev *rt2x00dev = hw->priv;
+        struct skb_desc *desc;
+        struct data_ring *ring;
+        struct data_entry *entry;
         int timeout;
 
         /*
@@ -1973,17 +1976,27 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
          * initialization.
          */
         control->queue = IEEE80211_TX_QUEUE_BEACON;
+        ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
+        entry = rt2x00_get_data_entry(ring);
 
         /*
-         * First we create the beacon.
+         * Add the descriptor in front of the skb.
          */
-        skb_push(skb, TXD_DESC_SIZE);
-        memset(skb->data, 0, TXD_DESC_SIZE);
+        skb_push(skb, ring->desc_size);
+        memset(skb->data, 0, ring->desc_size);
 
-        rt2x00lib_write_tx_desc(rt2x00dev, (__le32 *)skb->data,
-                                (struct ieee80211_hdr *)(skb->data +
-                                                         TXD_DESC_SIZE),
-                                skb->len - TXD_DESC_SIZE, control);
+        /*
+         * Fill in skb descriptor
+         */
+        desc = get_skb_desc(skb);
+        desc->desc_len = ring->desc_size;
+        desc->data_len = skb->len - ring->desc_size;
+        desc->desc = skb->data;
+        desc->data = skb->data + ring->desc_size;
+        desc->ring = ring;
+        desc->entry = entry;
+
+        rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
 
         /*
          * Write entire beacon with descriptor to register,