TW_IN_ATTENTION_LOOP
if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);