28 lines
1,017 B
Diff
28 lines
1,017 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Wed, 28 Nov 2018 22:36:06 +0100
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Subject: [PATCH] mac80211: fix reordering of buffered broadcast packets
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If the buffered broadcast queue contains packets, letting new packets bypass
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that queue can lead to heavy reordering, since the driver is probably throttling
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transmission of buffered multicast packets after beacons.
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Keep buffering packets until the buffer has been cleared (and no client
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is in powersave mode).
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Cc: stable@vger.kernel.org
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -435,8 +435,8 @@ ieee80211_tx_h_multicast_ps_buf(struct i
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if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
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info->hw_queue = tx->sdata->vif.cab_queue;
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- /* no stations in PS mode */
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- if (!atomic_read(&ps->num_sta_ps))
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+ /* no stations in PS mode and no buffered packets */
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+ if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
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return TX_CONTINUE;
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info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
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