Since region programming sees all components in the topology as a port, it's required that endpoints are treated equally. The easiest way to go from endpoint to port is to simply cache it at creation time.
Signed-off-by: Ben Widawsky <[email protected]> --- drivers/cxl/cxlmem.h | 2 ++ drivers/cxl/mem.c | 16 ++++++++++------ 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 4ea0686e5f84..38d6129499c8 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -36,12 +36,14 @@ * @cxlds: The device state backing this device * @id: id number of this memdev instance. * @component_reg_phys: register base of component registers + * @port: The port created by this device */ struct cxl_memdev { struct device dev; struct cdev cdev; struct cxl_dev_state *cxlds; int id; + struct cxl_port *port; }; static inline struct cxl_memdev *to_cxl_memdev(struct device *dev) diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index 9e6e98e5ea06..2ed7554155d2 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -45,8 +45,8 @@ static int wait_for_media(struct cxl_memdev *cxlmd) return 0; } -static int create_endpoint(struct cxl_memdev *cxlmd, - struct cxl_port *parent_port) +static struct cxl_port *create_endpoint(struct cxl_memdev *cxlmd, + struct cxl_port *parent_port) { struct cxl_dev_state *cxlds = cxlmd->cxlds; struct cxl_port *endpoint; @@ -54,10 +54,10 @@ static int create_endpoint(struct cxl_memdev *cxlmd, endpoint = devm_cxl_add_port(&parent_port->dev, &cxlmd->dev, cxlds->component_reg_phys, parent_port); if (IS_ERR(endpoint)) - return PTR_ERR(endpoint); + return endpoint; dev_dbg(&cxlmd->dev, "add: %s\n", dev_name(&endpoint->dev)); - return 0; + return endpoint; } /** @@ -123,7 +123,7 @@ static int cxl_mem_probe(struct device *dev) { struct cxl_memdev *cxlmd = to_cxl_memdev(dev); struct cxl_dev_state *cxlds = cxlmd->cxlds; - struct cxl_port *parent_port; + struct cxl_port *parent_port, *ep_port; int rc; rc = wait_for_media(cxlmd); @@ -182,7 +182,11 @@ static int cxl_mem_probe(struct device *dev) goto out; } - rc = create_endpoint(cxlmd, parent_port); + ep_port = create_endpoint(cxlmd, parent_port); + if (IS_ERR(ep_port)) + rc = PTR_ERR(ep_port); + else + cxlmd->port = ep_port; out: device_unlock(&parent_port->dev); put_device(&parent_port->dev); -- 2.34.1
