ath9k: ignore invalid signal strength values in a-mpdu packets, fixes average signal strength display fluctuations

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30359 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 37 insertions, 0 deletions

diff --git a/package/mac80211/patches/581-ath9k_report_missing_signal.patch b/package/mac80211/patches/581-ath9k_report_missing_signal.patch
new file mode 100644
index 000000000..7bf12ebd6
--- /dev/null
+++ b/package/mac80211/patches/581-ath9k_report_missing_signal.patch
@@ -0,0 +1,37 @@
+--- a/drivers/net/wireless/ath/ath9k/recv.c
++++ b/drivers/net/wireless/ath/ath9k/recv.c
+@@ -954,6 +954,7 @@ static void ath9k_process_rssi(struct at
+ 	struct ath_softc *sc = hw->priv;
+ 	struct ath_hw *ah = common->ah;
+ 	int last_rssi;
++	int rssi = rx_stats->rs_rssi;
+ 
+ 	if (!rx_stats->is_mybeacon ||
+ 	    ((ah->opmode != NL80211_IFTYPE_STATION) &&
+@@ -965,13 +966,12 @@ static void ath9k_process_rssi(struct at
+ 
+ 	last_rssi = sc->last_rssi;
+ 	if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
+-		rx_stats->rs_rssi = ATH_EP_RND(last_rssi,
+-					      ATH_RSSI_EP_MULTIPLIER);
+-	if (rx_stats->rs_rssi < 0)
+-		rx_stats->rs_rssi = 0;
++		rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER);
++	if (rssi < 0)
++		rssi = 0;
+ 
+ 	/* Update Beacon RSSI, this is used by ANI. */
+-	ah->stats.avgbrssi = rx_stats->rs_rssi;
++	ah->stats.avgbrssi = rssi;
+ }
+ 
+ /*
+@@ -1012,6 +1012,8 @@ static int ath9k_rx_skb_preprocess(struc
+ 	rx_status->signal = ah->noise + rx_stats->rs_rssi;
+ 	rx_status->antenna = rx_stats->rs_antenna;
+ 	rx_status->flag |= RX_FLAG_MACTIME_MPDU;
++	if (rx_stats->rs_moreaggr)
++		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
+ 
+ 	for (i = 0, j = 0; i < ARRAY_SIZE(rx_stats->rs_rssi_ctl); i++) {
+ 		s8 rssi;