On 04/04/2013 08:22 PM, Simon Wunderlich wrote: > [...] > > So the patch does not resolve the problem for you? I've checked it again with > a little printk in ath9ks config function. > > With the patch the radar_enabled flag gets disabled when changing the channel (5500 -> 5200). > If I don't apply the patch, it stays enabled. I did the same thing (start hostapd on > channel 5500, wait for CAC, echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/simulate_radar). > > Maybe I'm missing something? > Hi Simon, here is how to reproduce (assuming you are using the patches for DFS testing on ath9k posted yesterday). 1) enable DFS log output at ath9k echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/debug 2) run hostapd on DFS channel, my config is as follows interface=wlan3 driver=nl80211 ssid=testap hw_mode=a channel=108 wmm_enabled=1 ieee80211d=1 ieee80211h=1 country_code=DE wpa_group_rekey=300 wpa_gmk_rekey=640 wpa=2 wpa_key_mgmt=WPA-PSK wpa_pairwise=CCMP wpa_passphrase=testtest The log output I see is: Apr 5 11:44:00: [ 335.210749] IPv6: ADDRCONF(NETDEV_UP): wlan3: link is not ready Apr 5 11:44:00: [ 335.221152] ath: phy0: DFS enabled at freq 5540 Apr 5 11:44:04: [ 339.234487] ath: phy0: DFS enabled at freq 5540 Apr 5 11:44:04: [ 339.260298] ath: phy0: DFS enabled at freq 5540 Apr 5 11:44:04: [ 339.262750] ath: phy0: DFS enabled at freq 5540 Apr 5 11:44:04: [ 339.262786] IPv6: ADDRCONF(NETDEV_CHANGE): wlan3: link becomes ready So we passed the (shortened to 4s) CAC and AP is operating. 3) fire radar echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/simulate_radar I see: Apr 5 11:44:25: [ 360.294667] ath: phy0: DFS enabled at freq 5540 Apr 5 11:44:25: [ 360.297217] ath: phy0: DFS enabled at freq 5240 The 'DFS enabled ...' message is print if ath9k_config() is called with hw->conf.radar_enabled, which should never happen for freq 5240. I wish I had time to learn using ftrace to track it down... As said before, it is not critical for ath9k, but might be a hint to something going wrong above. Thanks, Zefir -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
