ath9k: assign keycache slots to unencrypted stations
Frame filtering relies on having a valid destination index (keycache slot),
to keep track of the destination. Assigning a keycache slot (configured
to unencrypted, with no key data attached) improves powersave handling in
AP mode with no encryption.
The dummy keycache entry for a station is cleared, when a real key gets
added.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 48ff8c2..65d46c6 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1526,7 +1526,7 @@
struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
struct ieee80211_hdr *hdr;
struct ath_frame_info *fi = get_frame_info(skb);
- struct ath_node *an;
+ struct ath_node *an = NULL;
struct ath_atx_tid *tid;
enum ath9k_key_type keytype;
u16 seqno = 0;
@@ -1534,11 +1534,13 @@
keytype = ath9k_cmn_get_hw_crypto_keytype(skb);
+ if (sta)
+ an = (struct ath_node *) sta->drv_priv;
+
hdr = (struct ieee80211_hdr *)skb->data;
- if (sta && ieee80211_is_data_qos(hdr->frame_control) &&
+ if (an && ieee80211_is_data_qos(hdr->frame_control) &&
conf_is_ht(&hw->conf) && (sc->sc_flags & SC_OP_TXAGGR)) {
- an = (struct ath_node *) sta->drv_priv;
tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
/*
@@ -1554,6 +1556,8 @@
memset(fi, 0, sizeof(*fi));
if (hw_key)
fi->keyix = hw_key->hw_key_idx;
+ else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0)
+ fi->keyix = an->ps_key;
else
fi->keyix = ATH9K_TXKEYIX_INVALID;
fi->keytype = keytype;
