54 lines
1.8 KiB
Diff
54 lines
1.8 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 2 Aug 2016 11:11:13 +0200
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Subject: [PATCH] mac80211: fix purging multicast PS buffer queue
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The code currently assumes that buffered multicast PS frames don't have
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a pending ACK frame for tx status reporting.
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However, hostapd sends a broadcast deauth frame on teardown for which tx
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status is requested. This can lead to the "Have pending ack frames"
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warning on module reload.
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Fix this by using ieee80211_free_txskb/ieee80211_purge_tx_queue.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/cfg.c
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+++ b/net/mac80211/cfg.c
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@@ -868,7 +868,7 @@ static int ieee80211_stop_ap(struct wiph
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/* free all potentially still buffered bcast frames */
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local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
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- skb_queue_purge(&sdata->u.ap.ps.bc_buf);
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+ ieee80211_purge_tx_queue(&local->hw, &sdata->u.ap.ps.bc_buf);
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mutex_lock(&local->mtx);
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ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -368,7 +368,7 @@ static void purge_old_ps_buffers(struct
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skb = skb_dequeue(&ps->bc_buf);
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if (skb) {
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purged++;
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- dev_kfree_skb(skb);
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+ ieee80211_free_txskb(&local->hw, skb);
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}
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total += skb_queue_len(&ps->bc_buf);
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}
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@@ -451,7 +451,7 @@ ieee80211_tx_h_multicast_ps_buf(struct i
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if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
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ps_dbg(tx->sdata,
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"BC TX buffer full - dropping the oldest frame\n");
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- dev_kfree_skb(skb_dequeue(&ps->bc_buf));
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+ ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
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} else
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tx->local->total_ps_buffered++;
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@@ -4276,7 +4276,7 @@ ieee80211_get_buffered_bc(struct ieee802
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sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
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if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
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break;
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- dev_kfree_skb_any(skb);
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+ ieee80211_free_txskb(hw, skb);
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}
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info = IEEE80211_SKB_CB(skb);
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