package/kernel/mac80211/patches/331-ath9k-fix-more-data-flag-for-buffered-multicast-pack.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sun, 23 Jul 2017 14:58:22 +0200
   3 Subject: [PATCH] ath9k: fix more-data flag for buffered multicast packets
   4
   5 The flag needs to be cleared for the last packet in the list, not the
   6 first one. Fixes some issues with multicast packet loss for powersave
   7 clients connected to an ath9k AP.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/drivers/net/wireless/ath/ath9k/xmit.c
  13 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
  14 @@ -2451,7 +2451,6 @@ void ath_tx_cabq(struct ieee80211_hw *hw
  15                 .txq = sc->beacon.cabq
  16         };
  17         struct ath_tx_info info = {};
  18 -       struct ieee80211_hdr *hdr;
  19         struct ath_buf *bf_tail = NULL;
  20         struct ath_buf *bf;
  21         LIST_HEAD(bf_q);
  22 @@ -2495,15 +2494,10 @@ void ath_tx_cabq(struct ieee80211_hw *hw
  23         if (list_empty(&bf_q))
  24                 return;
  25
  26 -       bf = list_first_entry(&bf_q, struct ath_buf, list);
  27 -       hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
  28 -
  29 -       if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) {
  30 -               hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  31 -               dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
  32 -                       sizeof(*hdr), DMA_TO_DEVICE);
  33 -       }
  34 +       bf = list_last_entry(&bf_q, struct ath_buf, list);
  35 +       ath9k_set_moredata(sc, bf, false);
  36
  37 +       bf = list_first_entry(&bf_q, struct ath_buf, list);
  38         ath_txq_lock(sc, txctl.txq);
  39         ath_tx_fill_desc(sc, bf, txctl.txq, 0);
  40         ath_tx_txqaddbuf(sc, txctl.txq, &bf_q, false);