mac80211: send (QoS) Null if no buffered frames
For PS-poll, there's a possible race between
us expiring a frame and the station polling
for it -- send it a null frame in that case.
For uAPSD, the standard says that we have to
send a frame in each SP, so send null if we
don't have any other frames.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index a0676d3..5bf91c4 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1520,8 +1520,7 @@
return 0;
}
-static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
+void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);