snd_rawmidi_transmit_ack
int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
snd_rawmidi_transmit_ack(mpu->substream_output, 1);
snd_rawmidi_transmit_ack(substream, 1);
snd_rawmidi_transmit_ack(substream, num_bytes);
snd_rawmidi_transmit_ack( substream, 1 );
snd_rawmidi_transmit_ack(substream, ff->rx_bytes[port]);
snd_rawmidi_transmit_ack(substream, port->consume_bytes);
snd_rawmidi_transmit_ack(substream, 1);
snd_rawmidi_transmit_ack(chip->midi_out, sent);
snd_rawmidi_transmit_ack(substream, done);
snd_rawmidi_transmit_ack(substream, pos);
snd_rawmidi_transmit_ack(substream, end);
snd_rawmidi_transmit_ack(substream, count);
snd_rawmidi_transmit_ack(substream, count);