[RFC PATCH 04/13] cxl: allow devices without mailbox capability

[<alucerop@amd.com>]

From: Alejandro Lucero <alucerop@amd.com>

A device not implementing the CXL memory-device class code, aka Type2
devices, has mailbox capability as optional. If the device registers
mapping does not show such capability, do not treat that as an error.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/regs.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c
index fd165e718cf2..5434a7c899fd 100644
--- a/drivers/cxl/core/regs.c
+++ b/drivers/cxl/core/regs.c
@@ -437,11 +437,10 @@ static int cxl_probe_regs(struct cxl_register_map *map)
 	case CXL_REGLOC_RBI_MEMDEV:
 		dev_map = &map->device_map;
 		cxl_probe_device_regs(host, base, dev_map);
-		if (!dev_map->status.valid || !dev_map->mbox.valid ||
+		if (!dev_map->status.valid ||
 		    !dev_map->memdev.valid) {
-			dev_err(host, "registers not found: %s%s%s\n",
+			dev_err(host, "registers not found: %s%s\n",
 				!dev_map->status.valid ? "status " : "",
-				!dev_map->mbox.valid ? "mbox " : "",
 				!dev_map->memdev.valid ? "memdev " : "");
 			return -ENXIO;
 		}
-- 
2.17.1