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ath9k: fix the .flush driver op implementation 

This patch simplifies the flush op and reuses ath_drain_all_txq for
flushing out pending frames if necessary. It also uses a global timeout
of 200ms instead of the per-queue 60ms timeout.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-03-11 21:38:19 +01:00 committed by John W. Linville
parent 0d51cccc24
commit 86271e460a
3 changed files with 34 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -189,7 +189,6 @@ struct ath_txq {
u32 axq_ampdu_depth;
bool stopped;
bool axq_tx_inprogress;
bool txq_flush_inprogress;
struct list_head axq_acq;
struct list_head txq_fifo[ATH_TXFIFO_DEPTH];
struct list_head txq_fifo_pending;

56
drivers/net/wireless/ath/ath9k/main.c
View File

@ -2128,56 +2128,42 @@ static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
{
#define ATH_FLUSH_TIMEOUT 60 /* ms */
struct ath_softc *sc = hw->priv;
struct ath_txq *txq = NULL;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
int i, j, npend = 0;
int timeout = 200; /* ms */
int i, j;
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
cancel_delayed_work_sync(&sc->tx_complete_work);
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (!ATH_TXQ_SETUP(sc, i))
continue;
txq = &sc->tx.txq[i];
if (drop)
timeout = 1;
if (!drop) {
for (j = 0; j < ATH_FLUSH_TIMEOUT; j++) {
if (!ath9k_has_pending_frames(sc, txq))
break;
usleep_range(1000, 2000);
}
for (j = 0; j < timeout; j++) {
int npend = 0;
if (j)
usleep_range(1000, 2000);
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (!ATH_TXQ_SETUP(sc, i))
continue;
npend += ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
}
if (drop || ath9k_has_pending_frames(sc, txq)) {
ath_dbg(common, ATH_DBG_QUEUE, "Drop frames from hw queue:%d\n",
txq->axq_qnum);
spin_lock_bh(&txq->axq_lock);
txq->txq_flush_inprogress = true;
spin_unlock_bh(&txq->axq_lock);
ath9k_ps_wakeup(sc);
ath9k_hw_stoptxdma(ah, txq->axq_qnum);
npend = ath9k_hw_numtxpending(ah, txq->axq_qnum);
ath9k_ps_restore(sc);
if (npend)
break;
ath_draintxq(sc, txq, false);
txq->txq_flush_inprogress = false;
}
if (!npend)
goto out;
}
if (npend) {
if (!ath_drain_all_txq(sc, false))
ath_reset(sc, false);
txq->txq_flush_inprogress = false;
}
out:
ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
}
struct ieee80211_ops ath9k_ops = {

28
drivers/net/wireless/ath/ath9k/xmit.c
View File

@ -2012,8 +2012,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
spin_lock_bh(&txq->axq_lock);
if (list_empty(&txq->axq_q)) {
txq->axq_link = NULL;
if (sc->sc_flags & SC_OP_TXAGGR &&
!txq->txq_flush_inprogress)
if (sc->sc_flags & SC_OP_TXAGGR)
ath_txq_schedule(sc, txq);
spin_unlock_bh(&txq->axq_lock);
break;
@ -2094,7 +2093,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
spin_lock_bh(&txq->axq_lock);
if (sc->sc_flags & SC_OP_TXAGGR && !txq->txq_flush_inprogress)
if (sc->sc_flags & SC_OP_TXAGGR)
ath_txq_schedule(sc, txq);
spin_unlock_bh(&txq->axq_lock);
}
@ -2265,18 +2264,17 @@ void ath_tx_edma_tasklet(struct ath_softc *sc)
spin_lock_bh(&txq->axq_lock);
if (!txq->txq_flush_inprogress) {
if (!list_empty(&txq->txq_fifo_pending)) {
INIT_LIST_HEAD(&bf_head);
bf = list_first_entry(&txq->txq_fifo_pending,
struct ath_buf, list);
list_cut_position(&bf_head,
&txq->txq_fifo_pending,
&bf->bf_lastbf->list);
ath_tx_txqaddbuf(sc, txq, &bf_head);
} else if (sc->sc_flags & SC_OP_TXAGGR)
ath_txq_schedule(sc, txq);
}
if (!list_empty(&txq->txq_fifo_pending)) {
INIT_LIST_HEAD(&bf_head);
bf = list_first_entry(&txq->txq_fifo_pending,
struct ath_buf, list);
list_cut_position(&bf_head,
&txq->txq_fifo_pending,
&bf->bf_lastbf->list);
ath_tx_txqaddbuf(sc, txq, &bf_head);
} else if (sc->sc_flags & SC_OP_TXAGGR)
ath_txq_schedule(sc, txq);
spin_unlock_bh(&txq->axq_lock);
}
}