95 lines
3 KiB
Diff
95 lines
3 KiB
Diff
From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
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Date: Fri, 17 Oct 2014 07:40:29 +0530
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Subject: [PATCH] ath9k: Improve flush() in mcc mode
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The flush timeout in MCC mode is very small, since
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we are constrained by the time slice for each
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channel context, but since only the HW queues are
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flushed when switching contexts, it is acceptable.
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Since the SW queues are also emptied in the mac80211 flush()
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callback, a larger duration is needed. Add an override
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argument to __ath9k_flush() and set it when flush()
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is called in MCC mode. This allows the driver to
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drain both the SW and HW queues.
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Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
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---
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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -719,7 +719,7 @@ void ath_update_survey_nf(struct ath_sof
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void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type);
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void ath_ps_full_sleep(unsigned long data);
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void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop,
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- bool sw_pending);
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+ bool sw_pending, bool timeout_override);
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/**********/
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/* BTCOEX */
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--- a/drivers/net/wireless/ath/ath9k/channel.c
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+++ b/drivers/net/wireless/ath/ath9k/channel.c
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@@ -1232,11 +1232,11 @@ void ath_chanctx_set_next(struct ath_sof
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ath9k_chanctx_stop_queues(sc, sc->cur_chan);
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queues_stopped = true;
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- __ath9k_flush(sc->hw, ~0, true, false);
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+ __ath9k_flush(sc->hw, ~0, true, false, false);
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if (ath_chanctx_send_ps_frame(sc, true))
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__ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO),
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- false, false);
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+ false, false, false);
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send_ps = true;
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spin_lock_bh(&sc->chan_lock);
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--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -2031,14 +2031,33 @@ static void ath9k_flush(struct ieee80211
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u32 queues, bool drop)
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{
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struct ath_softc *sc = hw->priv;
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+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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+
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+ if (ath9k_is_chanctx_enabled()) {
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+ if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
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+ goto flush;
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+ /*
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+ * If MCC is active, extend the flush timeout
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+ * and wait for the HW/SW queues to become
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+ * empty. This needs to be done outside the
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+ * sc->mutex lock to allow the channel scheduler
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+ * to switch channel contexts.
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+ *
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+ * The vif queues have been stopped in mac80211,
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+ * so there won't be any incoming frames.
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+ */
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+ __ath9k_flush(hw, queues, drop, true, true);
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+ return;
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+ }
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+flush:
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mutex_lock(&sc->mutex);
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- __ath9k_flush(hw, queues, drop, true);
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+ __ath9k_flush(hw, queues, drop, true, false);
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mutex_unlock(&sc->mutex);
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}
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void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop,
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- bool sw_pending)
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+ bool sw_pending, bool timeout_override)
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{
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struct ath_softc *sc = hw->priv;
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struct ath_hw *ah = sc->sc_ah;
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@@ -2059,7 +2078,10 @@ void __ath9k_flush(struct ieee80211_hw *
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}
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spin_lock_bh(&sc->chan_lock);
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- timeout = sc->cur_chan->flush_timeout;
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+ if (timeout_override)
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+ timeout = HZ / 5;
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+ else
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+ timeout = sc->cur_chan->flush_timeout;
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spin_unlock_bh(&sc->chan_lock);
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ath_dbg(common, CHAN_CTX,
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