*
* @init: prepare for communication with dongle.
* @stop: clear pending frames, disable data flow.
- * @txdata: send a data frame to the dongle (callee disposes skb).
+ * @txdata: send a data frame to the dongle. When the data
+ * has been transferred, the common driver must be
+ * notified using brcmf_txcomplete(). The common
+ * driver calls this function with interrupts
+ * disabled.
* @txctl: transmit a control request message to dongle.
* @rxctl: receive a control response message from dongle.
* @gettxq: obtain a reference of bus transmit queue (optional).