TXDONE_UNKNOWN
if (!test_bit(TXDONE_UNKNOWN, &txdesc->flags)) {
test_bit(TXDONE_UNKNOWN, &txdesc->flags);
rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
rt2x00lib_txdone_noinfo(entry_done, TXDONE_UNKNOWN);