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authorFelix Fietkau <nbd@nbd.name>2019-03-18 12:00:58 +0100
committerJohannes Berg <johannes.berg@intel.com>2019-04-08 13:31:31 +0200
commit2b4a66980217332d91ab1785e1750857d6d52bc8 (patch)
tree60e63e9c3911eb5a9993200886365a9deac37172 /net/mac80211
parent45fcef8b727b6f171bc5443e8153181a367d7a15 (diff)
downloadlinux-2b4a66980217332d91ab1785e1750857d6d52bc8.tar.bz2
mac80211: make ieee80211_schedule_txq schedule empty TXQs
Currently there is no way for the driver to signal to mac80211 that it should schedule a TXQ even if there are no packets on the mac80211 part of that queue. This is problematic if the driver has an internal retry queue to deal with software A-MPDU retry. This patch changes the behavior of ieee80211_schedule_txq to always schedule the queue, as its only user (ath9k) seems to expect such behavior already: it calls this function on tx status and on powersave wakeup whenever its internal retry queue is not empty. Also add an extra argument to ieee80211_return_txq to get the same behavior. This fixes an issue on ath9k where tx queues with packets to retry (and no new packets in mac80211) would not get serviced. Fixes: 89cea7493a346 ("ath9k: Switch to mac80211 TXQ scheduling and airtime APIs") Signed-off-by: Felix Fietkau <nbd@nbd.name> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/tx.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 134a3da147c6..2e816dd67be7 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3688,8 +3688,9 @@ out:
}
EXPORT_SYMBOL(ieee80211_next_txq);
-void ieee80211_schedule_txq(struct ieee80211_hw *hw,
- struct ieee80211_txq *txq)
+void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
+ struct ieee80211_txq *txq,
+ bool force)
{
struct ieee80211_local *local = hw_to_local(hw);
struct txq_info *txqi = to_txq_info(txq);
@@ -3697,7 +3698,8 @@ void ieee80211_schedule_txq(struct ieee80211_hw *hw,
spin_lock_bh(&local->active_txq_lock[txq->ac]);
if (list_empty(&txqi->schedule_order) &&
- (!skb_queue_empty(&txqi->frags) || txqi->tin.backlog_packets)) {
+ (force || !skb_queue_empty(&txqi->frags) ||
+ txqi->tin.backlog_packets)) {
/* If airtime accounting is active, always enqueue STAs at the
* head of the list to ensure that they only get moved to the
* back by the airtime DRR scheduler once they have a negative
@@ -3717,7 +3719,7 @@ void ieee80211_schedule_txq(struct ieee80211_hw *hw,
spin_unlock_bh(&local->active_txq_lock[txq->ac]);
}
-EXPORT_SYMBOL(ieee80211_schedule_txq);
+EXPORT_SYMBOL(__ieee80211_schedule_txq);
bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
struct ieee80211_txq *txq)