Add ports and port child node check in legacy function



in get_ports_legacy function, if there is no ports and port child nodes
of device node, just return to avoid unnecessary actions.

Change-Id: Ie392f1fe8265cb3dba38ac687a0a1612e772a943
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>

parent 0070b55b

drivers/hwtracing/coresight/coresight-platform.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -68,6 +68,13 @@ static void of_coresight_get_ports_legacy(const struct device_node *node,
		{
		struct device_node *ep = NULL;
		int in = 0, out = 0;
		struct device_node ports = NULL, port = NULL;

		ports = of_get_child_by_name(node, "ports");
		port = of_get_child_by_name(node, "port");

		if (!ports && !port)
		return;

		do {
		ep = of_graph_get_next_endpoint(node, ep);