int icc_set_bw()

in core.c [622:672]

• 36 lines of code
• 7 McCabe index (conditional complexity)

int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
{
	struct icc_node *node;
	u32 old_avg, old_peak;
	size_t i;
	int ret;

	if (!path)
		return 0;

	if (WARN_ON(IS_ERR(path) || !path->num_nodes))
		return -EINVAL;

	mutex_lock(&icc_lock);

	old_avg = path->reqs[0].avg_bw;
	old_peak = path->reqs[0].peak_bw;

	for (i = 0; i < path->num_nodes; i++) {
		node = path->reqs[i].node;

		/* update the consumer request for this path */
		path->reqs[i].avg_bw = avg_bw;
		path->reqs[i].peak_bw = peak_bw;

		/* aggregate requests for this node */
		aggregate_requests(node);

		trace_icc_set_bw(path, node, i, avg_bw, peak_bw);
	}

	ret = apply_constraints(path);
	if (ret) {
		pr_debug("interconnect: error applying constraints (%d)\n",
			 ret);

		for (i = 0; i < path->num_nodes; i++) {
			node = path->reqs[i].node;
			path->reqs[i].avg_bw = old_avg;
			path->reqs[i].peak_bw = old_peak;
			aggregate_requests(node);
		}
		apply_constraints(path);
	}

	mutex_unlock(&icc_lock);

	trace_icc_set_bw_end(path, ret);

	return ret;
}