[3.8.y.z extended stable] Patch "mac80211: update sta->last_rx on acked tx frames" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu Nov 7 22:32:36 UTC 2013

This is a note to let you know that I have just added a patch titled

    mac80211: update sta->last_rx on acked tx frames

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see



>From e843462cd07adda4813afe1e230a9c8f5b4b0792 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd at openwrt.org>
Date: Sun, 29 Sep 2013 21:39:34 +0200
Subject: mac80211: update sta->last_rx on acked tx frames

commit 0c5b93290b2f3c7a376567c03ae8d385b0e99851 upstream.

When clients are idle for too long, hostapd sends nullfunc frames for
probing. When those are acked by the client, the idle time needs to be

To make this work (and to avoid unnecessary probing), update sta->last_rx
whenever an ACK was received for a tx packet. Only do this if the flag

Signed-off-by: Felix Fietkau <nbd at openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg at intel.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 net/mac80211/status.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 07d9957..f3a2898 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -180,6 +180,9 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 	struct ieee80211_local *local = sta->local;
 	struct ieee80211_sub_if_data *sdata = sta->sdata;

+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		sta->last_rx = jiffies;
 	if (ieee80211_is_data_qos(mgmt->frame_control)) {
 		struct ieee80211_hdr *hdr = (void *) skb->data;
 		u8 *qc = ieee80211_get_qos_ctl(hdr);

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