rt2x00: Split rt2x00lib_write_tx_desc()

Split rt2x00lib_write_tx_desc() up into a TX descriptor initializor
and TX descriptor writer.

This split is required to properly allow mac80211 to move its
tx_control structure into the skb->cb array.
The rt2x00queue_create_tx_descriptor() function will read all tx control
information and convert it into a rt2x00 TX descriptor information structure.
After that function is complete, we have all information we needed from the
tx control structure and are free to start writing into the skb->cb array
for our own purposes.
rt2x00queue_write_tx_descriptor() will be in charge of really sending
the TX descriptor to the hardware and kicking the TX queue.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index d8e681ec4bb0..d01d5f16bbce 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -2361,18 +2361,27 @@ static u64 rt61pci_get_tsf(struct ieee80211_hw *hw)
 }
 
 static int rt61pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
-                          struct ieee80211_tx_control *control)
+                                 struct ieee80211_tx_control *control)
 {
         struct rt2x00_dev *rt2x00dev = hw->priv;
         struct rt2x00_intf *intf = vif_to_intf(control->vif);
         struct queue_entry_priv_pci_tx *priv_tx;
         struct skb_frame_desc *skbdesc;
+        struct txentry_desc txdesc;
         unsigned int beacon_base;
         u32 reg;
 
         if (unlikely(!intf->beacon))
                 return -ENOBUFS;
 
+        /*
+         * Copy all TX descriptor information into txdesc,
+         * after that we are free to use the skb->cb array
+         * for our information.
+         */
+        intf->beacon->skb = skb;
+        rt2x00queue_create_tx_descriptor(intf->beacon, &txdesc, control);
+
         priv_tx = intf->beacon->priv_data;
         memset(priv_tx->desc, 0, intf->beacon->queue->desc_size);
 
@@ -2402,7 +2411,7 @@ static int rt61pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
          * Write entire beacon with descriptor to register,
          * and kick the beacon generator.
          */
-        rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
+        rt2x00queue_write_tx_descriptor(intf->beacon, &txdesc);
         beacon_base = HW_BEACON_OFFSET(intf->beacon->entry_idx);
         rt2x00pci_register_multiwrite(rt2x00dev, beacon_base,
                                       skbdesc->desc, skbdesc->desc_len);