[PATCH v12 01/20] cxl/port: Fix release of RCD endpoints

[Robert Richter <rrichter@amd.com>]

Binding and unbindind RCD endpoints (e.g. mem0 device) caused the
corresponding endpoint not being released. Reason for that is the
wrong port discovered for RCD endpoints. See cxl_mem_probe() for
proper endpoint parent detection. Fix delete_endpoint() respectively.

Fixes: 0a19bfc8de93 ("cxl/port: Add RCD endpoint port enumeration")
Signed-off-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/cxl/core/port.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index 7ca01a834e18..d4572a02989a 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -1222,12 +1222,17 @@ static void delete_endpoint(void *data)
 	struct cxl_memdev *cxlmd = data;
 	struct cxl_port *endpoint = cxlmd->endpoint;
 	struct cxl_port *parent_port;
+	struct cxl_dport *dport;
 	struct device *parent;
 
-	parent_port = cxl_mem_find_port(cxlmd, NULL);
+	parent_port = cxl_mem_find_port(cxlmd, &dport);
 	if (!parent_port)
 		goto out;
-	parent = &parent_port->dev;
+
+	if (dport->rch)
+		parent = parent_port->uport_dev;
+	else
+		parent = &parent_port->dev;
 
 	device_lock(parent);
 	if (parent->driver && !endpoint->dead) {
-- 
2.30.2