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/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index f72b3d07a42d..df6621025f4b 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -186,6 +186,7 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
         struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
         struct queue_entry_priv_usb_tx *priv_tx = entry->priv_data;
         struct skb_frame_desc *skbdesc;
+        struct txentry_desc txdesc;
         u32 length;
 
         if (rt2x00queue_full(queue))
@@ -200,6 +201,14 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
         }
 
         /*
+         * Copy all TX descriptor information into txdesc,
+         * after that we are free to use the skb->cb array
+         * for our information.
+         */
+        entry->skb = skb;
+        rt2x00queue_create_tx_descriptor(entry, &txdesc, control);
+
+        /*
          * Add the descriptor in front of the skb.
          */
         skb_push(skb, queue->desc_size);
@@ -216,7 +225,7 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
         skbdesc->entry = entry;
 
         memcpy(&priv_tx->control, control, sizeof(priv_tx->control));
-        rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
+        rt2x00queue_write_tx_descriptor(entry, &txdesc);
 
         /*
          * USB devices cannot blindly pass the skb->len as the