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--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1271,16 +1271,14 @@ bool ath_drain_all_txq(struct ath_softc
if (sc->sc_flags & SC_OP_INVALID)
return true;
- /* Stop beacon queue */
- ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+ ath9k_hw_abort_tx_dma(ah);
- /* Stop data queues */
+ /* Check if any queue remains active */
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
- if (ATH_TXQ_SETUP(sc, i)) {
- txq = &sc->tx.txq[i];
- ath9k_hw_stoptxdma(ah, txq->axq_qnum);
- npend += ath9k_hw_numtxpending(ah, txq->axq_qnum);
- }
+ if (!ATH_TXQ_SETUP(sc, i))
+ continue;
+
+ npend += ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum);
}
if (npend)
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -143,6 +143,34 @@ bool ath9k_hw_updatetxtriglevel(struct a
}
EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
+void ath9k_hw_abort_tx_dma(struct ath_hw *ah)
+{
+ int i, q;
+
+ REG_WRITE(ah, AR_Q_TXD, AR_Q_TXD_M);
+
+ REG_SET_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+ REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+ REG_SET_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
+
+ for (q = 0; q < AR_NUM_QCU; q++) {
+ for (i = 0; i < 1000; i++) {
+ if (i)
+ udelay(5);
+
+ if (!ath9k_hw_numtxpending(ah, q))
+ break;
+ }
+ }
+
+ REG_CLR_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+ REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+ REG_CLR_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
+
+ REG_WRITE(ah, AR_Q_TXD, 0);
+}
+EXPORT_SYMBOL(ath9k_hw_abort_tx_dma);
+
bool ath9k_hw_stoptxdma(struct ath_hw *ah, u32 q)
{
#define ATH9K_TX_STOP_DMA_TIMEOUT 4000 /* usec */
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -676,6 +676,7 @@ void ath9k_hw_cleartxdesc(struct ath_hw
u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q);
bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel);
bool ath9k_hw_stoptxdma(struct ath_hw *ah, u32 q);
+void ath9k_hw_abort_tx_dma(struct ath_hw *ah);
void ath9k_hw_gettxintrtxqs(struct ath_hw *ah, u32 *txqs);
bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
const struct ath9k_tx_queue_info *qinfo);
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