ath9k: fix more-data flag for buffered multicast packets

The flag needs to be cleared for the last packet in the list, not the
first one. Fixes some issues with multicast packet loss for powersave
clients connected to an ath9k AP.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index bae0f6c045e1617d47b54664a435f6dc3dfb5799..43b6c8508e4938f0dc95d0ac345044824d2fb7b2 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2436,7 +2436,6 @@ void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                .txq = sc->beacon.cabq
        };
        struct ath_tx_info info = {};
-       struct ieee80211_hdr *hdr;
        struct ath_buf *bf_tail = NULL;
        struct ath_buf *bf;
        LIST_HEAD(bf_q);
@@ -2480,15 +2479,10 @@ void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
        if (list_empty(&bf_q))
                return;
 
-       bf = list_first_entry(&bf_q, struct ath_buf, list);
-       hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
-
-       if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) {
-               hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
-               dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
-                       sizeof(*hdr), DMA_TO_DEVICE);
-       }
+       bf = list_last_entry(&bf_q, struct ath_buf, list);
+       ath9k_set_moredata(sc, bf, false);
 
+       bf = list_first_entry(&bf_q, struct ath_buf, list);
        ath_txq_lock(sc, txctl.txq);
        ath_tx_fill_desc(sc, bf, txctl.txq, 0);
        ath_tx_txqaddbuf(sc, txctl.txq, &bf_q, false);