openwrtv4/package/mac80211/patches/546-ath9k_retry_cache_sync.patch

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--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -263,6 +263,7 @@ static void ath_tx_set_retry(struct ath_
struct sk_buff *skb)
{
struct ath_frame_info *fi = get_frame_info(skb);
+ struct ath_buf *bf = fi->bf;
struct ieee80211_hdr *hdr;
TX_STAT_INC(txq->axq_qnum, a_retries);
@@ -271,6 +272,8 @@ static void ath_tx_set_retry(struct ath_
hdr = (struct ieee80211_hdr *)skb->data;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY);
+ dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
+ sizeof(*hdr), DMA_TO_DEVICE);
}
static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc)