BUF_LEN_MASK
fintek->rem = (fintek->cmd & BUF_LEN_MASK);
duration = (duration & BUF_LEN_MASK) * SAMPLE_PERIOD;
duration += nvt->buf[i] & BUF_LEN_MASK;
if (complete && i == ret - 1 && val < BUF_LEN_MASK)
buf_val = (val > BUF_LEN_MASK) ? BUF_LEN_MASK : val;
rawir.duration = (sample & BUF_LEN_MASK) * SAMPLE_PERIOD;