> + sband = local->hw.wiphy->bands[band];
> + bitrates = sband->bitrates;
It might be interesting to loop once here and build a bitmap (in an
unsigned long) of rates marked ERP_G. Something like
erp_rates = 0;
for (i = 0; i < sband->n_bitrates; i++)
if (bitrates[i].flags & ...)
erp_rates |= BIT(i);
> + rcu_read_lock();
> + list_for_each_entry_rcu(sta, &local->sta_list, list) {
> + if (sdata != sta->sdata ||
> + sta->plink_state != NL80211_PLINK_ESTAB)
> + continue;
> +
> + short_slot = false;
> + rates = sta->sta.supp_rates[band];
> + for_each_set_bit(i, (unsigned long *)&rates,
> + sizeof(rates) * BITS_PER_BYTE) {
> + if (bitrates[i].flags & IEEE80211_RATE_ERP_G) {
> + short_slot = true;
> + break;
> + }
> + }
> +
> + if (!short_slot)
> + break;
Then the inner bitrate loop here becomes just
if (!(rates & erp_rates)) {
short_slot = false;
break;
}
which assumes "short_slot = true" as a precondition to going into the
sta loop.
(although that does change the overall logic to enable short slot when
NO stations are present)
johannes
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