From: Alejandro Lucero <alucerop@amd.com>

By definition a type2 cxl device will use the host managed memory for
specific functionality, therefore it should not be available to other
uses.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Davidlohr Bueso <daves@stgolabs.net>
---
 drivers/cxl/core/region.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 20bd0c82806c..e39f272dd445 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -3922,6 +3922,13 @@ static int cxl_region_probe(struct device *dev)
 	if (rc)
 		return rc;
 
+	/*
+	 * HDM-D[B] (device-memory) regions have accelerator specific usage.
+	 * Skip device-dax registration.
+	 */
+	if (cxlr->type == CXL_DECODER_DEVMEM)
+		return 0;
+
 	switch (cxlr->mode) {
 	case CXL_PARTMODE_PMEM:
 		rc = devm_cxl_region_edac_register(cxlr);
-- 
2.34.1