Timothy Redaelli <tredaelli@xxxxxxxxxx> writes: > On Fri, 09 Feb 2018 10:01:09 +0200 > Kalle Valo <kvalo@xxxxxxxxxxxxxx> wrote: > >> Timothy Redaelli <tredaelli@xxxxxxxxxx> writes: >> >> > The code currently syncronize the DFS region only if curchan != 0, >> > but hostapd launch DFS before the channel is set and so >> > set_dfs_domain is never executed. >> > >> > CC: Felix Fietkau <nbd@xxxxxxxx> >> > Signed-off-by: Timothy Redaelli <tredaelli@xxxxxxxxxx> >> >> What kind of bug does this fix? Please describe the symptoms from >> user's point of view. > > With the current code radar detection (CAC) doesn't work on ath9k > since "dpd_set_domain" is only called once with NL80211_DFS_UNSET (0) as > region and so "dpd_add_pulse" always returns true (radar detected) > without doing a real scan. > > You can test it easily with a kernel built with > CONFIG_ATH9K_DFS_CERTIFIED and by using a simple hostapd configuration: > > interface=wlp1s0 > hw_mode=a > channel=acs_survey > chanlist=100 104 108 112 116 120 124 128 132 136 140 > ieee80211d=1 > ieee80211h=1 > country_code=US > ieee80211n=1 > wmm_enabled=1 > ssid=testwifi Any ideas what broke this? Or has it never worked with FCC (US)? Anyway, please add this info to the commit log and submit v2. -- Kalle Valo
