iwlwifi: when HW has rate offload don't look at control field

Control field is set by mac80211 only if case rate is not offloaded to
hw.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210210135352.f845c4387eed.I30c4d26698bae1f5f8c396da80a545baa145e2ad@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/tx.c

@@ -265,20 +265,24 @@ static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 			       struct ieee80211_tx_info *info,
 			       struct ieee80211_sta *sta, __le16 fc)
 {
-	int rate_idx;
+	int rate_idx = -1;
 	u8 rate_plcp;
 	u32 rate_flags = 0;
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 
-	/* HT rate doesn't make sense for a non data frame */
-	WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
-		  !ieee80211_is_data(fc),
-		  "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
-		  info->control.rates[0].flags,
-		  info->control.rates[0].idx,
-		  le16_to_cpu(fc), mvmsta->sta_state);
+	/* info->control is only relevant for non HW rate control */
+	if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
+		/* HT rate doesn't make sense for a non data frame */
+		WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
+			  !ieee80211_is_data(fc),
+			  "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
+			  info->control.rates[0].flags,
+			  info->control.rates[0].idx,
+			  le16_to_cpu(fc), mvmsta->sta_state);
+
+		rate_idx = info->control.rates[0].idx;
+	}
 
-	rate_idx = info->control.rates[0].idx;
 	/* if the rate isn't a well known legacy rate, take the lowest one */
 	if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 		rate_idx = rate_lowest_index(