iwlwifi: mvm: don't configure mimo rates if nss is limited to 1

Remote peer can publish a different number of supported nss via the
operating mode notification IE or action frame. If it limits to 1
then we don't want mimo rates configured in the rate table.

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index f1364b7f58e4..a7efeb31c258 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -2250,6 +2250,9 @@ static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
                 }
         }
 
+        if (sta->rx_nss < 2)
+                return;
+
         highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
         if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
                 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {