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path: root/drivers/hwtracing
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-rw-r--r--drivers/hwtracing/coresight/coresight.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 0995df8f85bc..5443d03a1eec 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -265,15 +265,27 @@ static void coresight_disable_source(struct coresight_device *csdev)
void coresight_disable_path(struct list_head *path)
{
+ u32 type;
struct coresight_node *nd;
struct coresight_device *csdev, *parent, *child;
list_for_each_entry(nd, path, link) {
csdev = nd->csdev;
+ type = csdev->type;
- switch (csdev->type) {
+ /*
+ * ETF devices are tricky... They can be a link or a sink,
+ * depending on how they are configured. If an ETF has been
+ * "activated" it will be configured as a sink, otherwise
+ * go ahead with the link configuration.
+ */
+ if (type == CORESIGHT_DEV_TYPE_LINKSINK)
+ type = (csdev == coresight_get_sink(path)) ?
+ CORESIGHT_DEV_TYPE_SINK :
+ CORESIGHT_DEV_TYPE_LINK;
+
+ switch (type) {
case CORESIGHT_DEV_TYPE_SINK:
- case CORESIGHT_DEV_TYPE_LINKSINK:
coresight_disable_sink(csdev);
break;
case CORESIGHT_DEV_TYPE_SOURCE:
@@ -294,15 +306,27 @@ int coresight_enable_path(struct list_head *path, u32 mode)
{
int ret = 0;
+ u32 type;
struct coresight_node *nd;
struct coresight_device *csdev, *parent, *child;
list_for_each_entry_reverse(nd, path, link) {
csdev = nd->csdev;
+ type = csdev->type;
+
+ /*
+ * ETF devices are tricky... They can be a link or a sink,
+ * depending on how they are configured. If an ETF has been
+ * "activated" it will be configured as a sink, otherwise
+ * go ahead with the link configuration.
+ */
+ if (type == CORESIGHT_DEV_TYPE_LINKSINK)
+ type = (csdev == coresight_get_sink(path)) ?
+ CORESIGHT_DEV_TYPE_SINK :
+ CORESIGHT_DEV_TYPE_LINK;
- switch (csdev->type) {
+ switch (type) {
case CORESIGHT_DEV_TYPE_SINK:
- case CORESIGHT_DEV_TYPE_LINKSINK:
ret = coresight_enable_sink(csdev, mode);
if (ret)
goto err;