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ath9k: Send legacy rated frames as unaggregated

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Currently the aggregation is formed till the aggregation limit
is reached and the rate lookup is done for the first frame alone.
But there can be a legacy rated frames in tid queue. This patch
limits the subframe addition based on presence of legacy rate and
sends the legacy rated frames as unaggregated one.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-08-23 12:32:57 +05:30 committed by John W. Linville
parent 2a33bee275
commit 1a6e9d0f2e
1 changed files with 21 additions and 1 deletions
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22
drivers/net/wireless/ath/ath9k/xmit.c
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@ -571,6 +571,25 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
ath_reset(sc, false);
}
static bool ath_lookup_legacy(struct ath_buf *bf)
{
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
struct ieee80211_tx_rate *rates;
int i;
skb = bf->bf_mpdu;
tx_info = IEEE80211_SKB_CB(skb);
rates = tx_info->control.rates;
for (i = 3; i >= 0; i--) {
if (!(rates[i].flags & IEEE80211_TX_RC_MCS))
return true;
}
return false;
}
static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
struct ath_atx_tid *tid)
{
@ -750,7 +769,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
al_delta = ATH_AGGR_DELIM_SZ + fi->framelen;
if (nframes &&
(aggr_limit < (al + bpad + al_delta + prev_al))) {
((aggr_limit < (al + bpad + al_delta + prev_al)) ||
ath_lookup_legacy(bf))) {
status = ATH_AGGR_LIMITED;
break;
}