These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / hwtracing / coresight / coresight.c

diff --git a/kernel/drivers/hwtracing/coresight/coresight.c b/kernel/drivers/hwtracing/coresight/coresight.c
index 894531d..93738df 100644 (file)
--- a/kernel/drivers/hwtracing/coresight/coresight.c
+++ b/kernel/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)) {
@@ -543,7 +548,7 @@ static int coresight_name_match(struct device *dev, void *data)
        to_match = data;
        i_csdev = to_coresight_device(dev);
 
-       if (!strcmp(to_match, dev_name(&i_csdev->dev)))
+       if (to_match && !strcmp(to_match, dev_name(&i_csdev->dev)))
                return 1;
 
        return 0;