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

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30359 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2012-02-07 15:25:55 +00:00
parent c7ddcfd108
commit c993a44fa3
2 changed files with 81 additions and 0 deletions
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44
package/mac80211/patches/580-mac80211_ignore_bad_signal_values.patch Normal file
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@@ -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;