From 4623a26575847b385c7834549be4baf9f013d835 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Wed, 11 Dec 2013 09:32:28 +0200 Subject: [PATCH] iwlwifi: mvm: rs: disable MCS9 Tx workaround MCS9 introduces some corner cases in the current rs algorithm which may lead to non optimal throughput and instability in the throughput. Until all the corner cases are resolved disable MCS9 for Tx as a workaround which yields better throughput results as MCS8 is much more stable. Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/rs.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index 62b29d7f80f0..1f06450007ba 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -2207,6 +2207,10 @@ static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, if (i == IWL_RATE_9M_INDEX) continue; + /* Disable MCS9 as a workaround */ + if (i == IWL_RATE_MCS_9_INDEX) + continue; + /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ if (i == IWL_RATE_MCS_9_INDEX && sta->bandwidth == IEEE80211_STA_RX_BW_20) @@ -2225,6 +2229,10 @@ static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, if (i == IWL_RATE_9M_INDEX) continue; + /* Disable MCS9 as a workaround */ + if (i == IWL_RATE_MCS_9_INDEX) + continue; + /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ if (i == IWL_RATE_MCS_9_INDEX && sta->bandwidth == IEEE80211_STA_RX_BW_20) -- 2.39.5