On 06/01/2018 08:46 PM, Mathieu Poirier wrote:
On 1 June 2018 at 13:38, Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> wrote:
On Fri, Jun 01, 2018 at 02:16:01PM +0100, Suzuki K Poulose wrote:
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.
Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
drivers/hwtracing/coresight/of_coresight.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
index 7c37544..e0deab0 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -128,7 +128,7 @@ of_get_coresight_platform_data(struct device *dev,
struct device *rdev;
struct device_node *ep = NULL;
struct device_node *rparent = NULL;
- struct device_node *rport = NULL;
+ struct device_node *rep = NULL;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -169,16 +169,17 @@ of_get_coresight_platform_data(struct device *dev,
pdata->outports[i] = endpoint.port;
/*
- * 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);
- rport = of_graph_get_remote_port(ep);
-
- if (!rparent || !rport)
+ rep = of_graph_get_remote_endpoint(ep);
+ if (!rep)
+ continue;
+ rparent = of_graph_get_port_parent(rep);
+ if (!rparent)
continue;
- if (of_graph_parse_endpoint(rport, &rendpoint))
+ if (of_graph_parse_endpoint(rep, &rendpoint))
continue;
You are correct and I'm out to lunch.
rdev = of_coresight_get_endpoint_device(rparent);
@@ -186,7 +187,7 @@ of_get_coresight_platform_data(struct device *dev,
return ERR_PTR(-EPROBE_DEFER);
pdata->child_names[i] = dev_name(rdev);
- pdata->child_ports[i] = rendpoint.id;
+ pdata->child_ports[i] = rendpoint.port;
You need to do a of_node_put() here for both rep and rparent.
Same thing for the "continue" and error condition above.
Mathieu,
Thanks for pointing that out. I see that we were missing them for the
existing code as well. I will clean all this up.
Cheers
Suzuki
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