cxl: Adjust extended linear cache failure emission in cxl_acpi

The cxl_acpi module spams "Extended linear cache calculation failed"
when the hmat memory target is not found for a node. This is normal
when the memory target does not contain extended linear cache
attributes. Adjust cxl_acpi_set_cache_size() to just return 0 if error
is returned from hmat_get_extended_linear_cache_size(). That is the
only error returned from hmat_get_extended_linear_cache_size() as
-ENOENT.

Also remove the check for -EOPNOTSUPP in cxl_setup_extended_linear_cache()
since that errno is never returned by cxl_acpi_set_cache_size().

[dj: Flipped minor return logic suggested by Jonathan ]
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20251003185509.3215900-1-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

Author: davejiang

drivers/cxl/acpi.c

@@ -353,7 +353,7 @@ static int cxl_acpi_set_cache_size(struct cxl_root_decoder *cxlrd)
 
 	rc = hmat_get_extended_linear_cache_size(&res, nid, &cache_size);
 	if (rc)
-		return rc;
+		return 0;
 
 	/*
 	 * The cache range is expected to be within the CFMWS.
@@ -378,21 +378,18 @@ static void cxl_setup_extended_linear_cache(struct cxl_root_decoder *cxlrd)
 	int rc;
 
 	rc = cxl_acpi_set_cache_size(cxlrd);
-	if (!rc)
-		return;
-
-	if (rc != -EOPNOTSUPP) {
+	if (rc) {
 		/*
-		 * Failing to support extended linear cache region resize does not
+		 * Failing to retrieve extended linear cache region resize does not
 		 * prevent the region from functioning. Only causes cxl list showing
 		 * incorrect region size.
 		 */
 		dev_warn(cxlrd->cxlsd.cxld.dev.parent,
-			 "Extended linear cache calculation failed rc:%d\n", rc);
-	}
+			 "Extended linear cache retrieval failed rc:%d\n", rc);
 
-	/* Ignoring return code */
-	cxlrd->cache_size = 0;
+		/* Ignoring return code */
+		cxlrd->cache_size = 0;
+	}
 }
 
 DEFINE_FREE(put_cxlrd, struct cxl_root_decoder *,