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authorFelix Fietkau <nbd@openwrt.org>2012-02-07 15:25:55 +0000
committerFelix Fietkau <nbd@openwrt.org>2012-02-07 15:25:55 +0000
commitbec8df834bbb3b7db88cc8dfe6b577b9af54d632 (patch)
tree167995ddae472b7b01783e04846a1114f63347f2 /package/mac80211
parent834be6c1feabf46966806673148fb4917fa9052f (diff)
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ath9k: ignore invalid signal strength values in a-mpdu packets, fixes average signal strength display fluctuations
SVN-Revision: 30359
Diffstat (limited to 'package/mac80211')
-rw-r--r--package/mac80211/patches/580-mac80211_ignore_bad_signal_values.patch44
-rw-r--r--package/mac80211/patches/581-ath9k_report_missing_signal.patch37
2 files changed, 81 insertions, 0 deletions
diff --git a/package/mac80211/patches/580-mac80211_ignore_bad_signal_values.patch b/package/mac80211/patches/580-mac80211_ignore_bad_signal_values.patch
new file mode 100644
index 0000000000..b6d88b0bac
--- /dev/null
+++ b/package/mac80211/patches/580-mac80211_ignore_bad_signal_values.patch
@@ -0,0 +1,44 @@
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -659,6 +659,8 @@ ieee80211_tx_info_clear_status(struct ie
+ * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index
+ * @RX_FLAG_40MHZ: HT40 (40 MHz) was used
+ * @RX_FLAG_SHORT_GI: Short guard interval was used
++ * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present.
++ * Valid only for data frames (mainly A-MPDU)
+ */
+ enum mac80211_rx_flags {
+ RX_FLAG_MMIC_ERROR = 1<<0,
+@@ -672,6 +674,7 @@ enum mac80211_rx_flags {
+ RX_FLAG_HT = 1<<9,
+ RX_FLAG_40MHZ = 1<<10,
+ RX_FLAG_SHORT_GI = 1<<11,
++ RX_FLAG_NO_SIGNAL_VAL = 1<<12,
+ };
+
+ /**
+--- a/net/mac80211/rx.c
++++ b/net/mac80211/rx.c
+@@ -176,7 +176,8 @@ ieee80211_add_rx_radiotap_header(struct
+ pos += 2;
+
+ /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
+- if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
++ if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM &&
++ !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
+ *pos = status->signal;
+ rthdr->it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
+@@ -1309,8 +1310,10 @@ ieee80211_rx_h_sta_process(struct ieee80
+
+ sta->rx_fragments++;
+ sta->rx_bytes += rx->skb->len;
+- sta->last_signal = status->signal;
+- ewma_add(&sta->avg_signal, -status->signal);
++ if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
++ sta->last_signal = status->signal;
++ ewma_add(&sta->avg_signal, -status->signal);
++ }
+
+ if (status->chains) {
+ sta->chains = status->chains;
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 0000000000..7bf12ebd61
--- /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;