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mac80211: fix a regression in the broadcast AQL patch

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The AQL limit for buffered broadcast packets is higher than the maximum
total pending airtime limit. This can get unicast data stuck whenever there
is too much pending broadcast data. Fix this by excluding broadcast AQL from
the total limit.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2024-03-08 22:42:50 +01:00
parent e3bb01b30e
commit 1f5fd5cb97
1 changed files with 15 additions and 7 deletions
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22
package/kernel/mac80211/patches/subsys/330-mac80211-add-AQL-support-for-broadcast-packets.patch
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@ -95,12 +95,13 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
spin_lock_init(&local->active_txq_lock[i]);
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2341,28 +2341,27 @@ void ieee80211_sta_update_pending_airtim
@@ -2341,29 +2341,33 @@ void ieee80211_sta_update_pending_airtim
struct sta_info *sta, u8 ac,
u16 tx_airtime, bool tx_completed)
{
- int tx_pending;
+ int tx_pending = 0;
+ atomic_t *counter;
int tx_pending;
if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
return;
@ -113,9 +114,18 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ counter = &sta->airtime[ac].aql_tx_pending;
+ else
+ counter = &local->aql_bc_pending_airtime;
+
+ if (!tx_completed)
+ atomic_add(tx_airtime, counter);
+ else
+ tx_pending = atomic_sub_return(tx_airtime, counter);
+ if (tx_pending < 0)
+ atomic_cmpxchg(counter, tx_pending, 0);
+
+ if (!sta)
+ return;
+ if (!tx_completed) {
+ atomic_add(tx_airtime, counter);
atomic_add(tx_airtime, &local->aql_total_pending_airtime);
atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]);
return;
@ -128,12 +138,10 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
- atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
- tx_pending, 0);
- }
+ tx_pending = atomic_sub_return(tx_airtime, counter);
+ if (tx_pending < 0)
+ atomic_cmpxchg(counter, tx_pending, 0);
-
atomic_sub(tx_airtime, &local->aql_total_pending_airtime);
tx_pending = atomic_sub_return(tx_airtime,
&local->aql_ac_pending_airtime[ac]);
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3958,9 +3958,8 @@ begin: