rt2x00: Fix frame dumping for USB devices.

We forgot to clear the SKBDESC_DESC_IN_SKB when the descriptor was removed
from the front of the skb.

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

drivers/net/wireless/rt2x00/rt2x00usb.c

@@ -171,6 +171,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 {
 	struct queue_entry *entry = (struct queue_entry *)urb->context;
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 	struct txdone_entry_desc txdesc;
 
 	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
@@ -182,6 +183,11 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 	 */
 	skb_pull(entry->skb, entry->queue->desc_size);
 
+	/*
+	 * Signal that the TX descriptor is no longer in the skb.
+	 */
+	skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;
+
 	/*
 	 * Obtain the status about this packet.
 	 * Note that when the status is 0 it does not mean the