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Commit 4623a265 authored by Eyal Shapira's avatar Eyal Shapira Committed by Emmanuel Grumbach
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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: default avatarEyal Shapira <eyal@wizery.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent be2056fc

drivers/net/wireless/iwlwifi/mvm/rs.c

+8 −0
Original line number Diff line number Diff line
@@ -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)