static void qfq_update_start(struct qfq_sched *q, struct qfq_class *cl)
{
unsigned long mask;
- uint32_t limit, roundedF;
+ u64 limit, roundedF;
int slot_shift = cl->grp->slot_shift;
roundedF = qfq_round_down(cl->F, slot_shift);
- limit = qfq_round_down(q->V, slot_shift) + (1UL << slot_shift);
+ limit = qfq_round_down(q->V, slot_shift) + (1ULL << slot_shift);
if (!qfq_gt(cl->F, q->V) || qfq_gt(roundedF, limit)) {
/* timestamp was stale */
if (mask) {
struct qfq_group *next = qfq_ffs(q, mask);
if (qfq_gt(roundedF, next->F)) {
- cl->S = next->F;
+ if (qfq_gt(limit, next->F))
+ cl->S = next->F;
+ else /* preserve timestamp correctness */
+ cl->S = limit;
return;
}
}