X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fhwtracing%2Fcoresight%2Fcoresight.c;h=e25492137d8bec86a5ff406ff1025724df095fbd;hb=041c79514af9080c75197078283134f538f46b44;hp=894531d315b8312f481a15ce64b17bdebe7ffbb4;hpb=14738e03312ff1137109d68bcbf103c738af0f4a;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 894531d315b8..e25492137d8b 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -240,6 +240,11 @@ static int coresight_enable_path(struct list_head *path)
 	int ret = 0;
 	struct coresight_device *cd;
 
+	/*
+	 * At this point we have a full @path, from source to sink.  The
+	 * sink is the first entry and the source the last one.  Go through
+	 * all the components and enable them one by one.
+	 */
 	list_for_each_entry(cd, path, path_link) {
 		if (cd == list_first_entry(path, struct coresight_device,
 					   path_link)) {