Comment # 3 on bug 965125 from Takashi Iwai

Hm, this looks like happening at do_div() in e1000e_cyclecounter_read()

static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
{
......
    if ((hw->mac.type == e1000_82574) || (hw->mac.type == e1000_82583)) {
        u64 incvalue, time_delta, rem, temp;
......
        incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK;
        for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) {
            /* latch SYSTIMH on read of SYSTIML */
            systim_next = (cycle_t)er32(SYSTIML);
            systim_next |= (cycle_t)er32(SYSTIMH) << 32;

            time_delta = systim_next - systim;
            temp = time_delta;
            rem = do_div(temp, incvalue);

That is, the bit value read from TIMINCA register is zero.