vmbus_channel_send
error = vmbus_channel_send(sc->sc_chan, &req, sizeof(req),
error = vmbus_channel_send(chan, cmd, HVS_CMD_SIZE,
rv = vmbus_channel_send(rxr->rxr_chan, cmd, cmdsize,
rv = vmbus_channel_send(rxr->rxr_chan, &cmd, sizeof(cmd),
rv = vmbus_channel_send(txr->txr_chan, &rndis, sizeof(rndis),
error = vmbus_channel_send(chan, data, dlen, rid,
int vmbus_channel_send(struct vmbus_channel *, void *, uint32_t, uint64_t,