NFCAL_PENDING
nfcal_pending = test_bit(NFCAL_PENDING, &ah->caldata->cal_flags);
set_bit(NFCAL_PENDING, &ah->caldata->cal_flags);
clear_bit(NFCAL_PENDING, &caldata->cal_flags);
if (!test_bit(NFCAL_PENDING, &caldata->cal_flags))