ath10k: plug memory leak in wmi mgmt tx worker

sk_buff was not freed in some cases. The patch
unifies the msdu freeing.
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

@@ -1729,8 +1729,10 @@ void ath10k_mgmt_over_wmi_tx_work(struct work_struct *work)
 			break;
 
 		ret = ath10k_wmi_mgmt_tx(ar, skb);
-		if (ret)
+		if (ret) {
 			ath10k_warn("wmi mgmt_tx failed (%d)\n", ret);
+			ieee80211_free_txskb(ar->hw, skb);
+		}
 	}
 }
 

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

@@ -674,10 +674,8 @@ int ath10k_wmi_mgmt_tx(struct ath10k *ar, struct sk_buff *skb)
 
 	/* Send the management frame buffer to the target */
 	ret = ath10k_wmi_cmd_send(ar, wmi_skb, ar->wmi.cmd->mgmt_tx_cmdid);
-	if (ret) {
-		dev_kfree_skb_any(skb);
+	if (ret)
 		return ret;
-	}
 
 	/* TODO: report tx status to mac80211 - temporary just ACK */
 	info->flags |= IEEE80211_TX_STAT_ACK;