[PATCH v2 09/13] mac80211: support using ieee80211_tx_status_ext to free skbs without status info

Felix Fietkau
2020-08-21T04:20:25Z

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