static int slim_define_channel()

in stream.c [298:320]

• 19 lines of code
• 2 McCabe index (conditional complexity)

static int slim_define_channel(struct slim_stream_runtime *stream,
				       struct slim_port *port)
{
	struct slim_device *sdev = stream->dev;
	u8 wbuf[4];
	struct slim_val_inf msg = {0, 4, NULL, wbuf, NULL};
	u8 mc = SLIM_MSG_MC_NEXT_DEFINE_CHANNEL;
	DEFINE_SLIM_LDEST_TXN(txn, mc, 8, stream->dev->laddr, &msg);

	port->ch.seg_dist = slim_get_segdist_code(stream->ratem);

	wbuf[0] = port->ch.id;
	wbuf[1] = port->ch.seg_dist & 0xFF;
	wbuf[2] = (stream->prot << 4) | ((port->ch.seg_dist & 0xF00) >> 8);
	if (stream->prot == SLIM_PROTO_ISO)
		wbuf[3] = stream->bps/SLIM_SLOT_LEN_BITS;
	else
		wbuf[3] = stream->bps/SLIM_SLOT_LEN_BITS + 1;

	port->ch.state = SLIM_CH_STATE_DEFINED;

	return slim_do_transfer(sdev->ctrl, &txn);
}