validate_timestamp
prange->validate_timestamp = ktime_get_boottime();
if (ktime_before(timestamp, ktime_add_ns(prange->validate_timestamp,
prange->validate_timestamp = 0;
ktime_t validate_timestamp;
validate_timestamp(&tss->ts[0], &usr_ts);
validate_timestamp(&tss->ts[0], &prev_ts);
validate_timestamp(&tss->ts[0], &prev_ts);
validate_timestamp(&tss->ts[0], 0);
validate_timestamp(&tss->ts[0], cfg_delay_snd);
validate_timestamp(&tss->ts[0], cfg_delay_ack);