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mac80211: fix reordering of buffered broadcast packets

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If the buffered broadcast queue contains packets, letting new packets bypass
that queue can lead to heavy reordering, since the driver is probably throttling
transmission of buffered multicast packets after beacons.

Keep buffering packets until the buffer has been cleared (and no client
is in powersave mode).

Cc: [email protected]
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Felix Fietkau 2018-11-28 22:39:16 +01:00 • committed by Johannes Berg
commit 9ec1190d06
1 changed files with 2 additions and 2 deletions
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4
net/mac80211/tx.c
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@ -439,8 +439,8 @@ ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
info->hw_queue = tx->sdata->vif.cab_queue;
/* no stations in PS mode */
if (!atomic_read(&ps->num_sta_ps))
/* no stations in PS mode and no buffered packets */
if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
return TX_CONTINUE;
info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;