From 21f28e6f0061568b2347aa7517249fc034f949b5 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 15 Jan 2011 14:30:14 +0100
Subject: [PATCH] ath9k: try more than one tid when scheduling a new aggregate
Sometimes the first TID in the first AC's list is not available for forming
a new aggregate (the BAW might not allow it), however other TIDs may have
data available for sending.
Prevent a slowdown of other TIDs by going through multiple entries until
we've either hit the last one or enough AMPDUs are pending in the hardware
queue.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/xmit.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index ab4f7b4f789f..fffd13d204b5 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1224,12 +1224,14 @@ void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
{
struct ath_atx_ac *ac;
- struct ath_atx_tid *tid;
+ struct ath_atx_tid *tid, *last;
- if (list_empty(&txq->axq_acq))
+ if (list_empty(&txq->axq_acq) ||
+ txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
return;
ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
+ last = list_entry(ac->tid_q.prev, struct ath_atx_tid, list);
list_del(&ac->list);
ac->sched = false;
@@ -1253,7 +1255,8 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
if (!list_empty(&tid->buf_q))
ath_tx_queue_tid(txq, tid);
- break;
+ if (tid == last || txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
+ break;
} while (!list_empty(&ac->tid_q));
if (!list_empty(&ac->tid_q)) {
--
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