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ath9k: fix a long standing aggregation related tx lockup 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 41815
lede-17.01
Felix Fietkau 2014-07-23 13:44:44 +00:00
parent dc628f2e08
commit ad4a351f19
1 changed files with 37 additions and 3 deletions
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40
package/kernel/mac80211/patches/300-pending_work.patch
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@ -1,3 +1,21 @@
commit ff354dbdd743e5fe186df8cd17982db19f78231a
Author: Felix Fietkau <nbd@openwrt.org>
Date: Wed Jul 23 15:33:26 2014 +0200
ath9k: fix aggregation session lockup
If an aggregation session fails, frames still end up in the driver queue
with IEEE80211_TX_CTL_AMPDU set.
This causes tx for the affected station/tid to stall, since
ath_tx_get_tid_subframe returning packets to send.
Fix this by clearing IEEE80211_TX_CTL_AMPDU as long as no aggregation
session is running.
Cc: stable@vger.kernel.org
Reported-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
commit 38695a6e5a940e6a524523b88a33916b016fb2a1
Author: Felix Fietkau <nbd@openwrt.org>
Date: Fri Jul 11 12:06:18 2014 +0200
@ -2990,7 +3008,23 @@ Date: Mon May 19 21:20:49 2014 +0200
if (WARN_ON(--txq->pending_frames < 0))
txq->pending_frames = 0;
@@ -1999,6 +1997,7 @@ static void setup_frame_info(struct ieee
@@ -887,6 +885,15 @@ ath_tx_get_tid_subframe(struct ath_softc
tx_info = IEEE80211_SKB_CB(skb);
tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
+
+ /*
+ * No aggregation session is running, but there may be frames
+ * from a previous session or a failed attempt in the queue.
+ * Send them out as normal data frames
+ */
+ if (!tid->active)
+ tx_info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+
if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) {
bf->bf_state.bf_type = 0;
return bf;
@@ -1999,6 +2006,7 @@ static void setup_frame_info(struct ieee
an = (struct ath_node *) sta->drv_priv;
memset(fi, 0, sizeof(*fi));
@ -2998,7 +3032,7 @@ Date: Mon May 19 21:20:49 2014 +0200
if (hw_key)
fi->keyix = hw_key->hw_key_idx;
else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0)
@@ -2150,6 +2149,7 @@ int ath_tx_start(struct ieee80211_hw *hw
@@ -2150,6 +2158,7 @@ int ath_tx_start(struct ieee80211_hw *hw
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = txctl->sta;
struct ieee80211_vif *vif = info->control.vif;
@ -3006,7 +3040,7 @@ Date: Mon May 19 21:20:49 2014 +0200
struct ath_softc *sc = hw->priv;
struct ath_txq *txq = txctl->txq;
struct ath_atx_tid *tid = NULL;
@@ -2170,11 +2170,13 @@ int ath_tx_start(struct ieee80211_hw *hw
@@ -2170,11 +2179,13 @@ int ath_tx_start(struct ieee80211_hw *hw
q = skb_get_queue_mapping(skb);
ath_txq_lock(sc, txq);