leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ath9k: Handle invalid RSSI

Browse Source 
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>
This commit is contained in:
Sujith Manoharan 2013-08-14 21:15:54 +05:30 committed by John W. Linville
parent ea3ef101d7
commit e3acd13d21
1 changed files with 33 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/net/wireless/ath/ath9k/recv.c
View File

@ -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;
}
if (rx_stats->rs_rssi != ATH9K_RSSI_BAD && !rx_stats->rs_moreaggr)
/*
* 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;
}
/*
* 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;
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;
if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
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 = rssi;
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) &&