ath9k: Fix NoA start time calculation

The start time field in the NoA attribute needs to be
updated based on the TSF timer when an absence notification
is sent by the P2P GO. When two channel contexts are active,
continuous, cyclic NoA is announced by setting the count value to 255,
but the start time is updated only once, for one beacon and
the same value is sent in all subsequent beacons, even
though the timestamp keeps moving.

Fix this by removing the check for 'periodic_noa_duration'
and assign the interface's start_time/duration values directly
when there is more than one active context.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index 409f912a67c7c2b760f90ce2c473fbd716566be3..047a76fe2e7f5b3868c1a93dc525ae90e40cc583 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -377,13 +377,13 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
                    tsf_time - avp->periodic_noa_start > BIT(30))
                        avp->periodic_noa_duration = 0;
 
-               if (ctx->active && !avp->periodic_noa_duration) {
+               if (ctx->active) {
                        avp->periodic_noa_start = tsf_time;
                        avp->periodic_noa_duration =
                                TU_TO_USEC(cur_conf->beacon_interval) / 2 -
                                sc->sched.channel_switch_time;
                        noa_changed = true;
-               } else if (!ctx->active && avp->periodic_noa_duration) {
+               } else if (!ctx->active) {
                        avp->periodic_noa_duration = 0;
                        noa_changed = true;
                }