Ath5k: fix dma operation

Don't sync
- coherent mapping (descriptors)
- before unmap, it's useless
- (wrongly anyway -- for_cpu) beacon skb, it's just mapped,
  so by the device yet

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Cc: Luis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index 8e9afb3..3aa22dc 100644 (file)
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1704,10 +1704,6 @@ ath5k_tasklet_rx(unsigned long data)
                skb = bf->skb;
                ds = bf->desc;
 
-               /* TODO only one segment */
-               pci_dma_sync_single_for_cpu(sc->pdev, sc->desc_daddr,
-                               sc->desc_len, PCI_DMA_FROMDEVICE);
-
                /*
                 * last buffer must not be freed to ensure proper hardware
                 * function. When the hardware finishes also a packet next to
@@ -1771,8 +1767,6 @@ ath5k_tasklet_rx(unsigned long data)
                                goto next;
                }
 accept:
-               pci_dma_sync_single_for_cpu(sc->pdev, bf->skbaddr,
-                               rs.rs_datalen, PCI_DMA_FROMDEVICE);
                pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
                                PCI_DMA_FROMDEVICE);
                bf->skb = NULL;
@@ -1860,9 +1854,6 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
        list_for_each_entry_safe(bf, bf0, &txq->q, list) {
                ds = bf->desc;
 
-               /* TODO only one segment */
-               pci_dma_sync_single_for_cpu(sc->pdev, sc->desc_daddr,
-                               sc->desc_len, PCI_DMA_FROMDEVICE);
                ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
                if (unlikely(ret == -EINPROGRESS))
                        break;
@@ -2035,8 +2026,6 @@ ath5k_beacon_send(struct ath5k_softc *sc)
                ATH5K_WARN(sc, "beacon queue %u didn't stop?\n", sc->bhalq);
                /* NB: hw still stops DMA, so proceed */
        }
-       pci_dma_sync_single_for_cpu(sc->pdev, bf->skbaddr, bf->skb->len,
-                       PCI_DMA_TODEVICE);
 
        ath5k_hw_put_tx_buf(ah, sc->bhalq, bf->daddr);
        ath5k_hw_tx_start(ah, sc->bhalq);