[PATCH] coresight: platform: check the availability of the endpoint before parse

[Jie Gan <jie.gan@oss.qualcomm.com>]

Check endpoint availability before parsing it. If parsing a connected
endpoint fails, the probe is deferred until the endpoint becomes
available, or eventually fails. In some legacy cases, a replicator
has two output ports where one is disabled and the other is available.
The replicator probe always fails because the disabled endpoint never
becomes available for parsing. In addition, there is no need to defer
probing a device that is connected to a disabled device, which improves
probe performance.

Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
---
 drivers/hwtracing/coresight/coresight-platform.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 0ca3bd762454..e337b6e2bf32 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -220,6 +220,8 @@ static int of_coresight_parse_endpoint(struct device *dev,
 		rparent = of_coresight_get_port_parent(rep);
 		if (!rparent)
 			break;
+		if (!of_device_is_available(rparent))
+			break;
 		if (of_graph_parse_endpoint(rep, &rendpoint))
 			break;
 

---
base-commit: b5d083a3ed1e2798396d5e491432e887da8d4a06
change-id: 20260320-add-availability-check-4cb2ee6e520b

Best regards,
-- 
Jie Gan <jie.gan@oss.qualcomm.com>