ath10k: unify txpath decision

Some future changes will need to determine final
tx method early on. Prepare the code.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/mac.c

@@ -2994,6 +2994,13 @@ static void ath10k_reg_notifier(struct wiphy *wiphy,
 /* TX handlers */
 /***************/
 
+enum ath10k_mac_tx_path {
+	ATH10K_MAC_TX_HTT,
+	ATH10K_MAC_TX_HTT_MGMT,
+	ATH10K_MAC_TX_WMI_MGMT,
+	ATH10K_MAC_TX_UNKNOWN,
+};
+
 void ath10k_mac_tx_lock(struct ath10k *ar, int reason)
 {
 	lockdep_assert_held(&ar->htt.tx_lock);
@@ -3326,27 +3333,52 @@ static int ath10k_mac_tx_wmi_mgmt(struct ath10k *ar, struct sk_buff *skb)
 	return ret;
 }
 
-static int ath10k_mac_tx_submit(struct ath10k *ar,
-				enum ath10k_hw_txrx_mode txmode,
-				struct sk_buff *skb)
+static enum ath10k_mac_tx_path
+ath10k_mac_tx_h_get_txpath(struct ath10k *ar,
+			   struct sk_buff *skb,
+			   enum ath10k_hw_txrx_mode txmode)
 {
-	struct ath10k_htt *htt = &ar->htt;
-	int ret = 0;
-
 	switch (txmode) {
 	case ATH10K_HW_TXRX_RAW:
 	case ATH10K_HW_TXRX_NATIVE_WIFI:
 	case ATH10K_HW_TXRX_ETHERNET:
-		ret = ath10k_htt_tx(htt, txmode, skb);
-		break;
+		return ATH10K_MAC_TX_HTT;
 	case ATH10K_HW_TXRX_MGMT:
 		if (test_bit(ATH10K_FW_FEATURE_HAS_WMI_MGMT_TX,
 			     ar->fw_features))
-			ret = ath10k_mac_tx_wmi_mgmt(ar, skb);
+			return ATH10K_MAC_TX_WMI_MGMT;
 		else if (ar->htt.target_version_major >= 3)
-			ret = ath10k_htt_tx(htt, txmode, skb);
+			return ATH10K_MAC_TX_HTT;
 		else
-			ret = ath10k_htt_mgmt_tx(htt, skb);
+			return ATH10K_MAC_TX_HTT_MGMT;
+	}
+
+	return ATH10K_MAC_TX_UNKNOWN;
+}
+
+static int ath10k_mac_tx_submit(struct ath10k *ar,
+				enum ath10k_hw_txrx_mode txmode,
+				struct sk_buff *skb)
+{
+	struct ath10k_htt *htt = &ar->htt;
+	enum ath10k_mac_tx_path txpath;
+	int ret;
+
+	txpath = ath10k_mac_tx_h_get_txpath(ar, skb, txmode);
+
+	switch (txpath) {
+	case ATH10K_MAC_TX_HTT:
+		ret = ath10k_htt_tx(htt, txmode, skb);
+		break;
+	case ATH10K_MAC_TX_HTT_MGMT:
+		ret = ath10k_htt_mgmt_tx(htt, skb);
+		break;
+	case ATH10K_MAC_TX_WMI_MGMT:
+		ret = ath10k_mac_tx_wmi_mgmt(ar, skb);
+		break;
+	case ATH10K_MAC_TX_UNKNOWN:
+		WARN_ON_ONCE(1);
+		ret = -EINVAL;
 		break;
 	}