ath5k: Use new dma_stop function on base.c

 * Since we stop rx/tx dma and pcu durring reset there is no need to
 call ath5k_hw_stop_rx/tx_dma before, also there is no need to call
 them durring stop_locked since we can use ath5k_hw_dma_stop for
 both.

 Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 7f783d9..eea5879 100644 (file)
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -1063,62 +1063,44 @@ err:
        return ret;
 }
 
+/**
+ * ath5k_drain_tx_buffs - Empty tx buffers
+ *
+ * @sc The &struct ath5k_softc
+ *
+ * Empty tx buffers from all queues in preparation
+ * of a reset or during shutdown.
+ *
+ * NB: this assumes output has been stopped and
+ *     we do not need to block ath5k_tx_tasklet
+ */
 static void
-ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
+ath5k_drain_tx_buffs(struct ath5k_softc *sc)
 {
+       struct ath5k_txq *txq;
        struct ath5k_buf *bf, *bf0;
+       int i;
 
-       /*
-        * NB: this assumes output has been stopped and
-        *     we do not need to block ath5k_tx_tasklet
-        */
-       spin_lock_bh(&txq->lock);
-       list_for_each_entry_safe(bf, bf0, &txq->q, list) {
-               ath5k_debug_printtxbuf(sc, bf);
-
-               ath5k_txbuf_free_skb(sc, bf);
-
-               spin_lock_bh(&sc->txbuflock);
-               list_move_tail(&bf->list, &sc->txbuf);
-               sc->txbuf_len++;
-               txq->txq_len--;
-               spin_unlock_bh(&sc->txbuflock);
-       }
-       txq->link = NULL;
-       txq->txq_poll_mark = false;
-       spin_unlock_bh(&txq->lock);
-}
+       for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
+               if (sc->txqs[i].setup) {
+                       txq = &sc->txqs[i];
+                       spin_lock_bh(&txq->lock);
+                       list_for_each_entry_safe(bf, bf0, &txq->q, list) {
+                               ath5k_debug_printtxbuf(sc, bf);
 
-/*
- * Drain the transmit queues and reclaim resources.
- */
-static void
-ath5k_txq_cleanup(struct ath5k_softc *sc)
-{
-       struct ath5k_hw *ah = sc->ah;
-       unsigned int i;
+                               ath5k_txbuf_free_skb(sc, bf);
 
-       /* XXX return value */
-       if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
-               /* don't touch the hardware if marked invalid */
-               ath5k_hw_stop_tx_dma(ah, sc->bhalq);
-               ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
-                       ath5k_hw_get_txdp(ah, sc->bhalq));
-               for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
-                       if (sc->txqs[i].setup) {
-                               ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
-                               ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
-                                       "link %p\n",
-                                       sc->txqs[i].qnum,
-                                       ath5k_hw_get_txdp(ah,
-                                                       sc->txqs[i].qnum),
-                                       sc->txqs[i].link);
+                               spin_lock_bh(&sc->txbuflock);
+                               list_move_tail(&bf->list, &sc->txbuf);
+                               sc->txbuf_len++;
+                               txq->txq_len--;
+                               spin_unlock_bh(&sc->txbuflock);
                        }
+                       txq->link = NULL;
+                       txq->txq_poll_mark = false;
+                       spin_unlock_bh(&txq->lock);
+               }
        }
-
-       for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
-               if (sc->txqs[i].setup)
-                       ath5k_txq_drainq(sc, &sc->txqs[i]);
 }
 
 static void
@@ -1178,16 +1160,19 @@ err:
 }
 
 /*
- * Disable the receive h/w in preparation for a reset.
+ * Disable the receive logic on PCU (DRU)
+ * In preparation for a shutdown.
+ *
+ * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop
+ * does.
  */
 static void
 ath5k_rx_stop(struct ath5k_softc *sc)
 {
        struct ath5k_hw *ah = sc->ah;
 
-       ath5k_hw_stop_rx_pcu(ah);       /* disable PCU */
        ath5k_hw_set_rx_filter(ah, 0);  /* clear recv filter */
-       ath5k_hw_stop_rx_dma(ah);       /* disable DMA engine */
+       ath5k_hw_stop_rx_pcu(ah);       /* disable PCU */
 
        ath5k_debug_printrxbuffs(sc, ah);
 }
@@ -2383,10 +2368,9 @@ ath5k_stop_locked(struct ath5k_softc *sc)
                ath5k_led_off(sc);
                ath5k_hw_set_imr(ah, 0);
                synchronize_irq(sc->pdev->irq);
-       }
-       ath5k_txq_cleanup(sc);
-       if (!test_bit(ATH_STAT_INVALID, sc->status)) {
                ath5k_rx_stop(sc);
+               ath5k_hw_dma_stop(ah);
+               ath5k_drain_tx_buffs(sc);
                ath5k_hw_phy_disable(ah);
        }
 
@@ -2532,8 +2516,7 @@ ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan)
        stop_tasklets(sc);
 
        if (chan) {
-               ath5k_txq_cleanup(sc);
-               ath5k_rx_stop(sc);
+               ath5k_drain_tx_buffs(sc);
 
                sc->curchan = chan;
                sc->curband = &sc->sbands[chan->band];