[PATCH v11 01/20] cxl/port: Fix release of RCD endpoints

Robert Richter
2023-09-27T15:46:15Z

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.

Signed-off-by: Robert Richter <rrichter@amd.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