diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 267c679b0b3c..0c9d7f8ec9e4 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -691,12 +691,6 @@ static int cxl_pci_type3_init_mailbox(struct cxl_dev_state *cxlds)
 {
 	int rc;
 
-	/*
-	 * Fail the init if there's no mailbox. For a type3 this is out of spec.
-	 */
-	if (!cxlds->reg_map.device_map.mbox.valid)
-		return -ENODEV;
-
 	rc = cxl_mailbox_init(&cxlds->cxl_mbox, cxlds->dev);
 	if (rc)
 		return rc;