ieee802154 MAC: Free allocated TX descriptor if an error occurs after the descriptor has been allocated.

wireless/ieee802154/mac802154.c

@@ -130,6 +130,7 @@ static void mac802154_resetqueues(FAR struct ieee802154_privmac_s *priv)
     {
       sq_addlast((FAR sq_entry_t *)&priv->txdesc_pool[i], &priv->txdesc_queue);
     }
+
   sem_init(&priv->txdesc_sem, 0, CONFIG_MAC802154_NTXDESC);
 
   /* Initialize the notifcation allocation pool */

wireless/ieee802154/mac802154_data.c

@@ -340,7 +340,10 @@ int mac802154_req_data(MACHANDLE mac,
   return OK;
 
 errout_with_txdesc:
-  /* REVISIT: Free TX descriptor, but preserve the IOB. */
+  /* Free TX the descriptor, but preserve the IOB. */
+
+  txdesc->frame = NULL;
+  mac802154_txdesc_free(priv, txdesc);
 
 errout_with_sem:
   mac802154_givesem(&priv->exclsem);