rt2x00: Simplify arguments to rt2x00 driver callback functions

write_tx_desc shouldn't pass a rt2x00dev and skb pointer,
instead it should use the same format as other TX frame
callback functions, which is passing the data_entry pointer
which contains all the information which is needed to work
on a TX frame.

Most callers of the kick_tx_queue and kill_tx_queue already
have the data_queue pointer, so rather then sending the QID
with the given function, when the driver requests a new
pointer to the data_queue, it is more efficient to just
send the data_queue pointer directly.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index 97cf72f..8722464 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -1041,12 +1041,11 @@
 /*
  * TX descriptor initialization
  */
-static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-				    struct sk_buff *skb,
+static void rt2500usb_write_tx_desc(struct queue_entry *entry,
 				    struct txentry_desc *txdesc)
 {
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
-	__le32 *txd = (__le32 *) skb->data;
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
+	__le32 *txd = (__le32 *) entry->skb->data;
 	u32 word;
 
 	/*
@@ -1129,7 +1128,7 @@
 	/*
 	 * Write the TX descriptor for the beacon.
 	 */
-	rt2500usb_write_tx_desc(rt2x00dev, entry->skb, txdesc);
+	rt2500usb_write_tx_desc(entry, txdesc);
 
 	/*
 	 * Dump beacon to userspace through debugfs.