iwlwifi: mvm: rs: fix TPC action decision algorithm

Decreasing Tx power is allowed only when success ratio is
above the threshold defined in the algorithm. Add this condition.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 7bb6fd0..986e12a 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -2040,7 +2040,8 @@ static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
        }
 
        /* try decreasing first if applicable */
-       if (weak != TPC_INVALID) {
+       if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
+           weak != TPC_INVALID) {
                if (weak_tpt == IWL_INVALID_VALUE &&
                    (strong_tpt == IWL_INVALID_VALUE ||
                     current_tpt >= strong_tpt)) {