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From:   Felix Fietkau <nbd@nbd.name>
To:     linux-wireless@vger.kernel.org
Cc:     johannes@sipsolutions.net
Subject: [PATCH v2 09/13] mac80211: support using ieee80211_tx_status_ext to free skbs without status info
Date:   Fri, 21 Aug 2020 06:19:57 +0200
Message-Id: <20200821042001.23388-10-nbd@nbd.name>
In-Reply-To: <20200821042001.23388-1-nbd@nbd.name>
References: <20200821042001.23388-1-nbd@nbd.name>
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Sender: linux-wireless-owner@vger.kernel.org
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For encap-offloaded packets, ieee80211_free_txskb cannot be used, since it
does not have the vif pointer.
Using ieee80211_tx_status_ext for this purpose has the advantage of being able
avoid an extra station lookup for AQL

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 net/mac80211/status.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index ac4d988556b0..261bdda2ec08 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -1094,6 +1094,21 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 	acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 	noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
 
+	if (skb && (tx_time_est =
+		    ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
+		/* Do this here to avoid the expensive lookup of the sta
+		 * in ieee80211_report_used_skb().
+		 */
+		ieee80211_sta_update_pending_airtime(local, sta,
+						     skb_get_queue_mapping(skb),
+						     tx_time_est,
+						     true);
+		ieee80211_info_set_tx_time_est(info, 0);
+	}
+
+	if (!status->info)
+		goto free;
+
 	if (pubsta) {
 		sta = container_of(pubsta, struct sta_info, sta);
 
@@ -1132,17 +1147,6 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 			ieee80211s_update_metric(local, sta, status);
 	}
 
-	if (skb && (tx_time_est = ieee80211_info_get_tx_time_est(info)) > 0) {
-		/* Do this here to avoid the expensive lookup of the sta
-		 * in ieee80211_report_used_skb().
-		 */
-		ieee80211_sta_update_pending_airtime(local, sta,
-						     skb_get_queue_mapping(skb),
-						     tx_time_est,
-						     true);
-		ieee80211_info_set_tx_time_est(info, 0);
-	}
-
 	if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
 		return __ieee80211_tx_status(hw, status, rates_idx,
 					     retry_count);
@@ -1159,6 +1163,7 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 		I802_DEBUG_INC(local->dot11FailedCount);
 	}
 
+free:
 	if (!skb)
 		return;
 
-- 
2.28.0