rt2800usb: handle TX status timeouts

The watchdog just triggers rt2800usb_work_txdone() when it
detects a TX status timeout, thus rt2800usb_work_txdone() needs to
handle this case.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800usb.c

@@ -449,11 +449,14 @@ static void rt2800usb_work_txdone(struct work_struct *work)
 		while (!rt2x00queue_empty(queue)) {
 			entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
 
-			if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
-			    !test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
+			if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 				break;
-
+			if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
 				rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
+			else if (rt2x00queue_status_timeout(entry))
+				rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
+			else
+				break;
 		}
 	}
 }