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mac80211: handle aggregation session timeout on fast-xmit path 

The conversion to the fast-xmit path lost proper aggregation session
timeout handling - the last_tx wasn't set on that path and the timer
would therefore incorrectly tear down the session periodically (with
those drivers/rate control algorithms that have a timeout.)

In case of iwlwifi, this was every 5 seconds and caused significant
throughput degradation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-06-09 16:45:08 +02:00
parent c526a46767
commit 472be00d04
1 changed files with 6 additions and 3 deletions
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9
net/mac80211/tx.c
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@ -2719,9 +2719,12 @@ static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
if (tid_tx &&
!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
return false;
if (tid_tx) {
if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
return false;
if (tid_tx->timeout)
tid_tx->last_tx = jiffies;
}
}
/* after this point (skb is modified) we cannot return false */