Prev: [025/197] xfs: remove invalid barrier optimization from xfs_fsync
Next: [030/197] [SCSI] libiscsi: Fix recovery slowdown regression
From: Greg KH on 22 Apr 2010 16:50
2.6.32-stable review patch. If anyone has any objections, please let us know.

------------------

From: Wey-Yi Guy <wey-yi.w.guy(a)intel.com>

commit 74e2bd1fa3ae9695af566ad5a7a288898787b909 upstream.

When there is a need to restart/reconfig hw, tear down all the
aggregation queues and let the mac80211 and driver get in-sync to have
the opportunity to re-establish the aggregation queues again.

Need to wait until driver re-establish all the station information before tear
down the aggregation queues, driver(at least iwlwifi driver) will reject the
stop aggregation queue request if station is not ready. But also need to make
sure the aggregation queues are tear down before waking up the queues, so
mac80211 will not sending frames with aggregation bit set.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy(a)intel.com>
Signed-off-by: John W. Linville <linville(a)tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
net/mac80211/util.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1137,6 +1137,14 @@ int ieee80211_reconfig(struct ieee80211_
}
}

+ rcu_read_lock();
+ if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ ieee80211_sta_tear_down_BA_sessions(sta);
+ }
+ }
+ rcu_read_unlock();
+
/* add back keys */
list_for_each_entry(sdata, &local->interfaces, list)
if (netif_running(sdata->dev))


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [025/197] xfs: remove invalid barrier optimization from xfs_fsync
Next: [030/197] [SCSI] libiscsi: Fix recovery slowdown regression