Add comment to function coresight_enable_path() to make
sure there is no misunderstanding about what the code does.

Signed-off-by: Mathieu Poirier <[email protected]>
---
 drivers/hwtracing/coresight/coresight.c | 5 +++++
 1 file changed, 5 insertions(+)

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)) {
-- 
1.9.1

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