package/mac80211/patches/320-rx_dma_unmap.patch

   1 When freeing rx dma descriptors, use the right buffer size.
   2 Fixes kernel oopses on module unload on ixp4xx and most likely
   3 other platforms as well.
   4
   5 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   6
   7 --- a/drivers/net/wireless/ath5k/base.c
   8 +++ b/drivers/net/wireless/ath5k/base.c
   9 @@ -310,6 +310,19 @@ static inline void ath5k_txbuf_free(stru
  10         bf->skb = NULL;
  11  }
  12
  13 +static inline void ath5k_rxbuf_free(struct ath5k_softc *sc,
  14 +                               struct ath5k_buf *bf)
  15 +{
  16 +       BUG_ON(!bf);
  17 +       if (!bf->skb)
  18 +               return;
  19 +       pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
  20 +                       PCI_DMA_FROMDEVICE);
  21 +       dev_kfree_skb_any(bf->skb);
  22 +       bf->skb = NULL;
  23 +}
  24 +
  25 +
  26  /* Queues setup */
  27  static struct  ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
  28                                 int qtype, int subtype);
  29 @@ -1343,7 +1356,7 @@ ath5k_desc_free(struct ath5k_softc *sc,
  30         list_for_each_entry(bf, &sc->txbuf, list)
  31                 ath5k_txbuf_free(sc, bf);
  32         list_for_each_entry(bf, &sc->rxbuf, list)
  33 -               ath5k_txbuf_free(sc, bf);
  34 +               ath5k_rxbuf_free(sc, bf);
  35
  36         /* Free memory associated with all descriptors */
  37         pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);