ath10k: make ath10k report discarded packets to mac80211

Whenever ath10k firmware discards a packet (HTT_TX_COMPL_STATE_DISCARD
flag), the skb is freed and mac80211 does not get feedback through
ieee80211_tx_status().

Instead, make sure that the IEEE80211_TX_STAT_ACK flag is disabled and
let the packet go through, like ath9k does.
Signed-off-by: Ignacio Nunez Hernanz <nacho.nunez@aoifes.com>
[kvalo@codeaurora.org: rebase patch manually]
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath10k/txrx.c

@@ -102,11 +102,6 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
 	memset(&info->status, 0, sizeof(info->status));
 	trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
 
-	if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
-		ieee80211_free_txskb(htt->ar->hw, msdu);
-		return 0;
-	}
-
 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 		info->flags |= IEEE80211_TX_STAT_ACK;
 
@@ -117,6 +112,13 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
 	    (info->flags & IEEE80211_TX_CTL_NO_ACK))
 		info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 
+	if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
+		if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+			info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+		else
+			info->flags &= ~IEEE80211_TX_STAT_ACK;
+	}
+
 	ieee80211_tx_status(htt->ar->hw, msdu);
 	/* we do not own the msdu anymore */