diff options
| author | Sujith Manoharan <c_manoha@qca.qualcomm.com> | 2013-08-14 19:45:54 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-08-16 00:08:06 +0400 |
| commit | e3acd13d2141fa25566877e8f575065f204317f5 (patch) | |
| tree | 1cf3b151867ae62da2a74ee0bb45b4fbf64105a4 /drivers/net/wireless | |
| parent | ea3ef101d750f78dc1e532bcf759ab9afea295df (diff) | |
| download | linux-e3acd13d2141fa25566877e8f575065f204317f5.tar.xz | |
ath9k: Handle invalid RSSI
The combined RSSI can be invalid which is indicated by
the value -128. Use RX_FLAG_NO_SIGNAL_VAL for such cases.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/recv.c | 49 |
1 files changed, 33 insertions, 16 deletions
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 3b47198239f9..6ad7d6196b2e 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -885,29 +885,49 @@ static int ath9k_process_rate(struct ath_common *common, static void ath9k_process_rssi(struct ath_common *common, struct ieee80211_hw *hw, - struct ath_rx_status *rx_stats) + struct ath_rx_status *rx_stats, + struct ieee80211_rx_status *rxs) { 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) && - (ah->opmode != NL80211_IFTYPE_ADHOC))) + /* + * RSSI is not available for subframes in an A-MPDU. + */ + if (rx_stats->rs_moreaggr) { + rxs->flag |= RX_FLAG_NO_SIGNAL_VAL; + return; + } + + /* + * Check if the RSSI for the last subframe in an A-MPDU + * or an unaggregated frame is valid. + */ + if (rx_stats->rs_rssi == ATH9K_RSSI_BAD) { + rxs->flag |= RX_FLAG_NO_SIGNAL_VAL; return; + } - if (rx_stats->rs_rssi != ATH9K_RSSI_BAD && !rx_stats->rs_moreaggr) + /* + * Update Beacon RSSI, this is used by ANI. + */ + if (rx_stats->is_mybeacon && + ((ah->opmode == NL80211_IFTYPE_STATION) || + (ah->opmode == NL80211_IFTYPE_ADHOC))) { ATH_RSSI_LPF(sc->last_rssi, rx_stats->rs_rssi); + last_rssi = sc->last_rssi; + + if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER)) + rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER); + if (rssi < 0) + rssi = 0; - last_rssi = sc->last_rssi; - if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER)) - rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER); - if (rssi < 0) - rssi = 0; + ah->stats.avgbrssi = rssi; + } - /* Update Beacon RSSI, this is used by ANI. */ - ah->stats.avgbrssi = rssi; + rxs->signal = ah->noise + rx_stats->rs_rssi; } static void ath9k_process_tsf(struct ath_rx_status *rs, @@ -1149,15 +1169,12 @@ static int ath9k_rx_skb_preprocess(struct ath_softc *sc, goto exit; } - ath9k_process_rssi(common, hw, rx_stats); + ath9k_process_rssi(common, hw, rx_stats, rx_status); rx_status->band = hw->conf.chandef.chan->band; rx_status->freq = hw->conf.chandef.chan->center_freq; - rx_status->signal = ah->noise + rx_stats->rs_rssi; rx_status->antenna = rx_stats->rs_antenna; rx_status->flag |= RX_FLAG_MACTIME_END; - if (rx_stats->rs_moreaggr) - rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL; #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT if (ieee80211_is_data_present(hdr->frame_control) && |