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mac80211: make ieee80211_schedule_txq schedule empty TXQs

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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: 89cea7493a ("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>
This commit is contained in:
Felix Fietkau
2019-03-18 12:00:58 +01:00
committed by Johannes Berg
parent 45fcef8b72
commit 2b4a669802
5 changed files with 33 additions and 12 deletions
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24
include/net/mac80211.h
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@@ -6253,26 +6253,42 @@ static inline void ieee80211_txq_schedule_end(struct ieee80211_hw *hw, u8 ac)
{
}
void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
struct ieee80211_txq *txq, bool force);
/**
* ieee80211_schedule_txq - schedule a TXQ for transmission
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
*
* Schedules a TXQ for transmission if it is not already scheduled.
* Schedules a TXQ for transmission if it is not already scheduled,
* even if mac80211 does not have any packets buffered.
*
* The driver may call this function if it has buffered packets for
* this TXQ internally.
*/
void ieee80211_schedule_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq);
static inline void
ieee80211_schedule_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
{
__ieee80211_schedule_txq(hw, txq, true);
}
/**
* ieee80211_return_txq - return a TXQ previously acquired by ieee80211_next_txq()
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
* @force: schedule txq even if mac80211 does not have any buffered packets.
*
* The driver may set force=true if it has buffered packets for this TXQ
* internally.
*/
static inline void
ieee80211_return_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
ieee80211_return_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq,
bool force)
{
ieee80211_schedule_txq(hw, txq);
__ieee80211_schedule_txq(hw, txq, force);
}
/**