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authorEyal Shapira <eyal@wizery.com>2014-09-17 13:56:29 +0300
committerEmmanuel Grumbach <emmanuel.grumbach@intel.com>2014-10-29 12:49:11 +0200
commitdc574e526381ddcc7e5103ca091fd93c29129c6d (patch)
tree12ea3f17503f0662d71fccdce18fe60a721c8429 /drivers
parente7322f32881589cc47709b65713455aa4621e22e (diff)
iwlwifi: rs: option to easily disable Tx MIMO
The current TLC isn't optimized for low latency and some devices have issues with MIMO. This kind of combo creates latency issues. Allow to temporarily disable MIMO for tests in order to solve the latency issues without the added complexity of MIMO. Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com> Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/constants.h1
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/rs.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/constants.h b/drivers/net/wireless/iwlwifi/mvm/constants.h
index d4dfbe4cb66d..dfec5b5e7e14 100644
--- a/drivers/net/wireless/iwlwifi/mvm/constants.h
+++ b/drivers/net/wireless/iwlwifi/mvm/constants.h
@@ -95,5 +95,6 @@
#define IWL_MVM_FW_MCAST_FILTER_PASS_ALL 0
#define IWL_MVM_QUOTA_THRESHOLD 8
#define IWL_MVM_RS_RSSI_BASED_INIT_RATE 0
+#define IWL_MVM_RS_DISABLE_MIMO 0
#endif /* __MVM_CONSTANTS_H */
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 18a539999580..0d836fe67e83 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -2684,6 +2684,9 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
lq_sta->ldpc = true;
}
+ if (IWL_MVM_RS_DISABLE_MIMO)
+ lq_sta->active_mimo2_rate = 0;
+
lq_sta->max_legacy_rate_idx = find_last_bit(&lq_sta->active_legacy_rate,
BITS_PER_LONG);
lq_sta->max_siso_rate_idx = find_last_bit(&lq_sta->active_siso_rate,