[ath9k-devel] ath9k in wireless-testing won't work in AP mode

[Felix Fietkau <nbd@openwrt.org>]

On 2010-01-30 12:05 AM, Pavel Roskin wrote:
> Hello
> 
> ath9k in wireless-testing won't work in AP mode.  Stations fail to
> associate:
> 
> # hostapd /etc/hostapd/wlan13.conf
> Configuration file: /etc/hostapd/wlan13.conf
> Using interface wlan13 with hwaddr 00:15:6d:84:1f:37 and ssid 'mike2'
> wlan13: STA 00:17:c4:3b:fc:88 IEEE 802.11: did not acknowledge
> authentication response
> 
> I haven't used ath9k in AP mode for a long time if ever, so I don't know
> when it broke.
Please try this patch and see if it helps.

--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1229,6 +1229,11 @@ void ath9k_hw_init_global_settings(struc
 	/* As defined by IEEE 802.11-2007 17.3.8.6 */
 	slottime = ah->slottime + 3 * ah->coverage_class;
 	acktimeout = slottime + sifstime;
+
+	/* Workaround for a hw issue */
+	if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
+		acktimeout = max(64, acktimeout);
+
 	ath9k_hw_setslottime(ah, slottime);
 	ath9k_hw_set_ack_timeout(ah, acktimeout);
 	ath9k_hw_set_cts_timeout(ah, acktimeout);