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/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
index c17078eac197..a056b12fbd1c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00pci.c
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -41,6 +41,7 @@ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev,
 	struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
 	struct queue_entry_priv_pci_tx *priv_tx = entry->priv_data;
 	struct skb_frame_desc *skbdesc;
+	struct txentry_desc txdesc;
 	u32 word;
 
 	if (rt2x00queue_full(queue))
@@ -58,6 +59,14 @@ int rt2x00pci_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);
+
+	/*
 	 * Fill in skb descriptor
 	 */
 	skbdesc = get_skb_frame_desc(skb);
@@ -69,8 +78,8 @@ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev,
 
 	memcpy(&priv_tx->control, control, sizeof(priv_tx->control));
 	memcpy(priv_tx->data, skb->data, skb->len);
-	rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
 
+	rt2x00queue_write_tx_descriptor(entry, &txdesc);
 	rt2x00queue_index_inc(queue, Q_INDEX);
 
 	return 0;