On Tue, Dec 06, 2016 at 06:02:52PM +0100, Jean-Pierre Tosoni wrote: > This follows on the previous discussion > "Client station sends probes on DFS channels" > > Problem: > The combination of QCA988X firmware v10.2.4.70-2 + ath10k + > wpa_supplicant do not comply with the norm ETSI/EN 301-893 > section 4.7; because they can send probes for 600s when no > AP is around. > > Analysis: > The problem seems to lie in the firmware, which regards the presence > of *any* beacon as a proof that the channel is radar-clean for 600s. I don't think this is really firmware, but cfg80211 regulatory code and how it interacts with ath10k.. > - there is no obvious fix working in ath10k. > - the issue does not show up with other mac80211 devices like ath9k. > - wpa_supplicant considers this is a kernel issue [2] There seems to be a difference between ath9k (mac80211-based Probe Request frame sending) and ath10k (firmware) in this area for active scanning. mac80211 uses IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR while ath10k uses IEEE80211_CHAN_NO_IR. I'd assume this difference results in ath10k using cfg80211 beacon hints (etc.) to update the NO_IR flag and that might be behind the difference you see. Could you check whether the following change gets you the behavior you want to see here? I have not had a chance to test this yet, but based on code review, it looks like something that brings the same behavior to ath10k that ath9k has for this through mac80211. diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index aa545a1..758dbbd 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -2973,7 +2973,8 @@ static int ath10k_update_channel_list(struct ath10k *ar) ch->chan_radar = !!(channel->flags & IEEE80211_CHAN_RADAR); - passive = channel->flags & IEEE80211_CHAN_NO_IR; + passive = channel->flags & (IEEE80211_CHAN_NO_IR | + IEEE80211_CHAN_RADAR); ch->passive = passive; ch->freq = channel->center_freq; -- Jouni Malinen PGP id EFC895FA
