static int ssi_async()

in controllers/omap_ssi_port.c [377:416]

• 34 lines of code
• 5 McCabe index (conditional complexity)

static int ssi_async(struct hsi_msg *msg)
{
	struct hsi_port *port = hsi_get_port(msg->cl);
	struct omap_ssi_port *omap_port = hsi_port_drvdata(port);
	struct list_head *queue;
	int err = 0;

	BUG_ON(!msg);

	if (msg->sgt.nents > 1)
		return -ENOSYS; /* TODO: Add sg support */

	if (msg->break_frame)
		return ssi_async_break(msg);

	if (msg->ttype) {
		BUG_ON(msg->channel >= omap_port->sst.channels);
		queue = &omap_port->txqueue[msg->channel];
	} else {
		BUG_ON(msg->channel >= omap_port->ssr.channels);
		queue = &omap_port->rxqueue[msg->channel];
	}
	msg->status = HSI_STATUS_QUEUED;

	pm_runtime_get_sync(omap_port->pdev);
	spin_lock_bh(&omap_port->lock);
	list_add_tail(&msg->link, queue);
	err = ssi_start_transfer(queue);
	if (err < 0) {
		list_del(&msg->link);
		msg->status = HSI_STATUS_ERROR;
	}
	spin_unlock_bh(&omap_port->lock);
	pm_runtime_mark_last_busy(omap_port->pdev);
	pm_runtime_put_autosuspend(omap_port->pdev);
	dev_dbg(&port->device, "msg status %d ttype %d ch %d\n",
				msg->status, msg->ttype, msg->channel);

	return err;
}