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From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date: Fri, 17 Oct 2014 07:40:22 +0530
Subject: [PATCH] ath9k: Check for active GO in mgd_prepare_tx()
If a GO interface is active when we receive a
mgd_prepare_tx() call, then we need to send
out a new NoA before switching to a new context.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
---
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -385,6 +385,7 @@ struct ath_chanctx_sched {
bool wait_switch;
bool force_noa_update;
bool extend_absence;
+ bool mgd_prepare_tx;
enum ath_chanctx_state state;
u8 beacon_miss;
@@ -977,6 +978,7 @@ struct ath_softc {
struct ath_chanctx_sched sched;
struct ath_offchannel offchannel;
struct ath_chanctx *next_chan;
+ struct completion go_beacon;
#endif
unsigned long driver_data;
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -421,6 +421,9 @@ void ath_chanctx_event(struct ath_softc
"Move chanctx state from WAIT_FOR_TIMER to WAIT_FOR_BEACON\n");
}
+ if (sc->sched.mgd_prepare_tx)
+ sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON;
+
/*
* When a context becomes inactive, for example,
* disassociation of a station context, the NoA
@@ -547,6 +550,15 @@ void ath_chanctx_event(struct ath_softc
}
sc->sched.beacon_pending = false;
+
+ if (sc->sched.mgd_prepare_tx) {
+ sc->sched.mgd_prepare_tx = false;
+ complete(&sc->go_beacon);
+ ath_dbg(common, CHAN_CTX,
+ "Beacon sent, complete go_beacon\n");
+ break;
+ }
+
if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON)
break;
@@ -1263,6 +1275,8 @@ void ath9k_init_channel_context(struct a
(unsigned long)sc);
setup_timer(&sc->sched.timer, ath_chanctx_timer,
(unsigned long)sc);
+
+ init_completion(&sc->go_beacon);
}
void ath9k_deinit_channel_context(struct ath_softc *sc)
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2474,7 +2474,11 @@ static void ath9k_mgd_prepare_tx(struct
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_vif *avp = (struct ath_vif *) vif->drv_priv;
+ struct ath_beacon_config *cur_conf;
+ struct ath_chanctx *go_ctx;
+ unsigned long timeout;
bool changed = false;
+ u32 beacon_int;
if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
return;
@@ -2485,19 +2489,46 @@ static void ath9k_mgd_prepare_tx(struct
mutex_lock(&sc->mutex);
spin_lock_bh(&sc->chan_lock);
- if (sc->next_chan || (sc->cur_chan != avp->chanctx)) {
- sc->next_chan = avp->chanctx;
+ if (sc->next_chan || (sc->cur_chan != avp->chanctx))
changed = true;
+ spin_unlock_bh(&sc->chan_lock);
+
+ if (!changed)
+ goto out;
+
+ go_ctx = ath_is_go_chanctx_present(sc);
+
+ if (go_ctx) {
+ /*
+ * Wait till the GO interface gets a chance
+ * to send out an NoA.
+ */
+ spin_lock_bh(&sc->chan_lock);
+ sc->sched.mgd_prepare_tx = true;
+ cur_conf = &go_ctx->beacon;
+ beacon_int = TU_TO_USEC(cur_conf->beacon_interval);
+ spin_unlock_bh(&sc->chan_lock);
+
+ timeout = usecs_to_jiffies(beacon_int);
+ init_completion(&sc->go_beacon);
+
+ if (wait_for_completion_timeout(&sc->go_beacon,
+ timeout) == 0)
+ ath_dbg(common, CHAN_CTX,
+ "Failed to send new NoA\n");
}
+
ath_dbg(common, CHAN_CTX,
- "%s: Set chanctx state to FORCE_ACTIVE, changed: %d\n",
- __func__, changed);
+ "%s: Set chanctx state to FORCE_ACTIVE for vif: %pM\n",
+ __func__, vif->addr);
+
+ spin_lock_bh(&sc->chan_lock);
+ sc->next_chan = avp->chanctx;
sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE;
spin_unlock_bh(&sc->chan_lock);
- if (changed)
- ath_chanctx_set_next(sc, true);
-
+ ath_chanctx_set_next(sc, true);
+out:
mutex_unlock(&sc->mutex);
}
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