coresight: adding comments to remove ambiguity

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

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 894531d..e254921 100644 (file)
--- 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)) {