From: Suzuki K Poulose <suzuki.poul...@arm.com>
When parsing the remote endpoint of an output port, we do :
rport = of_graph_get_remote_port(ep);
rparent = of_graph_get_remote_port_parent(ep);
and then parse the "remote_port" as if it was the remote endpoint,
which is wrong. The code worked fine because we used endpoint number
as the port number. Let us fix it and optimise a bit as:
remote_ep = of_graph_get_remote_endpoint(ep);
if (remote_ep)
remote_parent = of_graph_get_port_parent(remote_ep);
and then, parse the remote_ep for the port/endpoint details.
Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poir...@linaro.org>
---
drivers/hwtracing/coresight/of_coresight.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/hwtracing/coresight/of_coresight.c
b/drivers/hwtracing/coresight/of_coresight.c
index 4b279f8fea0c..2ecdd1432b5c 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -134,7 +134,7 @@ static int of_coresight_parse_endpoint(struct device *dev,
int ret = 0;
struct of_endpoint endpoint, rendpoint;
struct device_node *rparent = NULL;
- struct device_node *rport = NULL;
+ struct device_node *rep = NULL;
struct device *rdev = NULL;
do {
@@ -142,16 +142,16 @@ static int of_coresight_parse_endpoint(struct device *dev,
if (of_graph_parse_endpoint(ep, &endpoint))
break;
/*
- * Get a handle on the remote port and parent
- * attached to it.
+ * Get a handle on the remote endpoint and the device it is
+ * attached to.
*/
- rparent = of_graph_get_remote_port_parent(ep);
- if (!rparent)
+ rep = of_graph_get_remote_endpoint(ep);
+ if (!rep)
break;
- rport = of_graph_get_remote_port(ep);
- if (!rport)
+ rparent = of_graph_get_port_parent(rep);
+ if (!rparent)
break;
- if (of_graph_parse_endpoint(rport, &rendpoint))
+ if (of_graph_parse_endpoint(rep, &rendpoint))
break;
/* If the remote device is not available, defer probing */
@@ -165,15 +165,15 @@ static int of_coresight_parse_endpoint(struct device *dev,
pdata->child_names[i] = devm_kstrdup(dev,
dev_name(rdev),
GFP_KERNEL);
- pdata->child_ports[i] = rendpoint.id;
+ pdata->child_ports[i] = rendpoint.port;
/* Connection record updated */
ret = 1;
} while (0);
if (rparent)
of_node_put(rparent);
- if (rport)
- of_node_put(rport);
+ if (rep)
+ of_node_put(rep);
if (rdev)
put_device(rdev);
--
2.7.4
