package/kernel/mac80211/patches/316-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
   4  packets
   5
   6 The flag needs to be cleared for the last packet in the list, not the
   7 first one. Fixes some issues with multicast packet loss for powersave
   8 clients connected to an ath9k AP.
   9
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/drivers/net/wireless/ath/ath9k/xmit.c
  14 +++ b/drivers/net/wireless/ath/ath9k/xmit.c
  15 @@ -2451,7 +2451,6 @@ void ath_tx_cabq(struct ieee80211_hw *hw
  16                 .txq = sc->beacon.cabq
  17         };
  18         struct ath_tx_info info = {};
  19 -       struct ieee80211_hdr *hdr;
  20         struct ath_buf *bf_tail = NULL;
  21         struct ath_buf *bf;
  22         LIST_HEAD(bf_q);
  23 @@ -2495,15 +2494,10 @@ void ath_tx_cabq(struct ieee80211_hw *hw
  24         if (list_empty(&bf_q))
  25                 return;
  26
  27 -       bf = list_first_entry(&bf_q, struct ath_buf, list);
  28 -       hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
  29 -
  30 -       if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) {
  31 -               hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  32 -               dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
  33 -                       sizeof(*hdr), DMA_TO_DEVICE);
  34 -       }
  35 +       bf = list_last_entry(&bf_q, struct ath_buf, list);
  36 +       ath9k_set_moredata(sc, bf, false);
  37
  38 +       bf = list_first_entry(&bf_q, struct ath_buf, list);
  39         ath_txq_lock(sc, txctl.txq);
  40         ath_tx_fill_desc(sc, bf, txctl.txq, 0);
  41         ath_tx_txqaddbuf(sc, txctl.txq, &bf_q, false);