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ath9k: limit multicast buffer hardware queue depth

Telusuri Sumber 
The CAB (Content after Beacon) queue is used for beacon-triggered
transmission of buffered multicast frames. If lots of multicast frames
were buffered and this queue fills up, it drowns out all regular
traffic. To limit the damage that buffered traffic can do, try to limit
the queued data to becaon_interval / 8.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2013-06-07 18:12:02 +02:00
committed by John W. Linville
orang tua 86a22acfcb
melakukan 59505c02e1
3 mengubah file dengan 104 tambahan dan 36 penghapusan
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23
drivers/net/wireless/ath/ath9k/beacon.c
Melihat File

@@ -108,23 +108,6 @@ static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
}
static void ath9k_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_tx_control txctl;
memset(&txctl, 0, sizeof(struct ath_tx_control));
txctl.txq = sc->beacon.cabq;
ath_dbg(common, XMIT, "transmitting CABQ packet, skb: %p\n", skb);
if (ath_tx_start(hw, skb, &txctl) != 0) {
ath_dbg(common, XMIT, "CABQ TX failed\n");
ieee80211_free_txskb(hw, skb);
}
}
static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
@@ -206,10 +189,8 @@ static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
while (skb) {
ath9k_tx_cabq(hw, skb);
skb = ieee80211_get_buffered_bc(hw, vif);
}
if (skb)
ath_tx_cabq(hw, vif, skb);
return bf;
}