On 20/11/15 18:49, Johannes Berg wrote:
>
>> @@ -599,7 +599,9 @@ static int __ieee80211_start_scan(struct
>> ieee80211_sub_if_data *sdata,
>>
>> if ((req->channels[0]->flags &
>> IEEE80211_CHAN_NO_IR) ||
>> - !req->n_ssids) {
>> + !req->n_ssids ||
>> + ((req->channels[0]->flags &
>> IEEE80211_CHAN_RADAR) &&
>> + (req->flags &
>> NL80211_SCAN_FLAG_PASSIVE_RADAR))) {
>> next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
>>
>
> I don't really see any circumstances under which it's valid to actively
> scan radar channels ... seems like we should do this unconditionally?
I think it would be reasonable only if the target channel is the one we
are using and we have done CSA. But when scanning non-operative channels
I don't think this could work.
As discussed on IRC I'd rather go for passively scanning any DFS channel.
Cheers,
--
Antonio Quartulli
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