This is a note to let you know that I've just added the patch titled
mac80211: fix purging multicast PS buffer queue
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mac80211-fix-purging-multicast-ps-buffer-queue.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6b07d9ca9b5363dda959b9582a3fc9c0b89ef3b5 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxx>
Date: Tue, 2 Aug 2016 11:13:41 +0200
Subject: mac80211: fix purging multicast PS buffer queue
From: Felix Fietkau <nbd@xxxxxxxx>
commit 6b07d9ca9b5363dda959b9582a3fc9c0b89ef3b5 upstream.
The code currently assumes that buffered multicast PS frames don't have
a pending ACK frame for tx status reporting.
However, hostapd sends a broadcast deauth frame on teardown for which tx
status is requested. This can lead to the "Have pending ack frames"
warning on module reload.
Fix this by using ieee80211_free_txskb/ieee80211_purge_tx_queue.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/cfg.c | 2 +-
net/mac80211/tx.c | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1126,7 +1126,7 @@ static int ieee80211_stop_ap(struct wiph
/* free all potentially still buffered bcast frames */
local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
- skb_queue_purge(&sdata->u.ap.ps.bc_buf);
+ ieee80211_purge_tx_queue(&local->hw, &sdata->u.ap.ps.bc_buf);
ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
mutex_lock(&local->mtx);
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -351,7 +351,7 @@ static void purge_old_ps_buffers(struct
skb = skb_dequeue(&ps->bc_buf);
if (skb) {
purged++;
- dev_kfree_skb(skb);
+ ieee80211_free_txskb(&local->hw, skb);
}
total += skb_queue_len(&ps->bc_buf);
}
@@ -434,7 +434,7 @@ ieee80211_tx_h_multicast_ps_buf(struct i
if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
ps_dbg(tx->sdata,
"BC TX buffer full - dropping the oldest frame\n");
- dev_kfree_skb(skb_dequeue(&ps->bc_buf));
+ ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
} else
tx->local->total_ps_buffered++;
@@ -2910,7 +2910,7 @@ ieee80211_get_buffered_bc(struct ieee802
sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
if (!ieee80211_tx_prepare(sdata, &tx, skb))
break;
- dev_kfree_skb_any(skb);
+ ieee80211_free_txskb(hw, skb);
}
info = IEEE80211_SKB_CB(skb);
Patches currently in stable-queue which might be from nbd@xxxxxxxx are
queue-3.14/mac80211-fix-purging-multicast-ps-buffer-queue.patch
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