iwlwifi: configure missed beacon threshold

Add support to configure missed beacon threshold, by default, if receive
"missed beacon" notification from uCode and has more than 5 consecutive
beacon missed, then perform sensitivity calibration; with this change,
allow user to adjust the missed beacon threshold from debugfs in case
more sensitivity calibration required for better performance in noisy
environment

The default value (=5) should be good enough for the normal condition,
but for very noisy environment, more sensitivity calibration could help
improve the throughput, so by setting the missed beacon threshold to
lower number, user might experience better performance result.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index eb45f8be0746..dc06c7bb0f5c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -499,9 +499,10 @@ void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
         struct iwl_missed_beacon_notif *missed_beacon;
 
         missed_beacon = &pkt->u.missed_beacon;
-        if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
+        if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
+            priv->missed_beacon_threshold) {
                 IWL_DEBUG_CALIB(priv, "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
-                    le32_to_cpu(missed_beacon->consequtive_missed_beacons),
+                    le32_to_cpu(missed_beacon->consecutive_missed_beacons),
                     le32_to_cpu(missed_beacon->total_missed_becons),
                     le32_to_cpu(missed_beacon->num_recvd_beacons),
                     le32_to_cpu(missed_beacon->num_expected_beacons));