mac80211: fix driver RSSI event calculations

The ifmgd->ave_beacon_signal value cannot be taken as is for
comparisons, it must be divided by since it's represented
like that for better accuracy of the EWMA calculations. This
would lead to invalid driver RSSI events. Fix the used value.

Fixes: 615f7b9bb1f8 ("mac80211: add driver RSSI threshold events")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index ce01cd3c82247eda6117a3dc6487981d6e49a2f8..79cfc2b35ef0c67279c15e7fc3a5f20dae4b1f2c 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -3380,7 +3380,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 
        if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
            ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
-               int sig = ifmgd->ave_beacon_signal;
+               int sig = ifmgd->ave_beacon_signal / 16;
                int last_sig = ifmgd->last_ave_beacon_signal;
                struct ieee80211_event event = {
                        .type = RSSI_EVENT,