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, 10 insertions, 1 deletions

diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 1bcf8c132cdc..bc44116a8a3e 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1956,6 +1956,7 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
         struct rt2x00_dev *rt2x00dev = hw->priv;
         struct rt2x00_intf *intf = vif_to_intf(control->vif);
         struct skb_frame_desc *skbdesc;
+        struct txentry_desc txdesc;
         unsigned int beacon_base;
         u32 reg;
 
@@ -1963,6 +1964,14 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
                 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);
+
+        /*
          * Add the descriptor in front of the skb.
          */
         skb_push(skb, intf->beacon->queue->desc_size);
@@ -1994,7 +2003,7 @@ static int rt73usb_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);
         rt2x00usb_vendor_request(rt2x00dev, USB_MULTI_WRITE,
                                  USB_VENDOR_REQUEST_OUT, beacon_base, 0,