1 files changed, 5 insertions, 24 deletions

diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index c19d86c195b0..0e4e6b7983cc 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -238,7 +238,6 @@ static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
 				    struct acpi_pnp_device_id *source,
 				    char *string_area)
 {
-
 	/* Create the destination PNP_DEVICE_ID */
 
 	dest->string = string_area;
@@ -263,8 +262,8 @@ static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
  *              namespace node and possibly by running several standard
  *              control methods (Such as in the case of a device.)
  *
- * For Device and Processor objects, run the Device _HID, _UID, _CID, _SUB,
- * _CLS, _STA, _ADR, _sx_w, and _sx_d methods.
+ * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA,
+ * _CLS, _ADR, _sx_w, and _sx_d methods.
  *
  * Note: Allocates the return buffer, must be freed by the caller.
  *
@@ -279,7 +278,6 @@ acpi_get_object_info(acpi_handle handle,
 	struct acpi_pnp_device_id_list *cid_list = NULL;
 	struct acpi_pnp_device_id *hid = NULL;
 	struct acpi_pnp_device_id *uid = NULL;
-	struct acpi_pnp_device_id *sub = NULL;
 	struct acpi_pnp_device_id *cls = NULL;
 	char *next_id_string;
 	acpi_object_type type;
@@ -325,7 +323,7 @@ acpi_get_object_info(acpi_handle handle,
 	if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
 		/*
 		 * Get extra info for ACPI Device/Processor objects only:
-		 * Run the Device _HID, _UID, _SUB, _CID, and _CLS methods.
+		 * Run the Device _HID, _UID, _CLS, and _CID methods.
 		 *
 		 * Note: none of these methods are required, so they may or may
 		 * not be present for this device. The Info->Valid bitfield is used
@@ -348,14 +346,6 @@ acpi_get_object_info(acpi_handle handle,
 			valid |= ACPI_VALID_UID;
 		}
 
-		/* Execute the Device._SUB method */
-
-		status = acpi_ut_execute_SUB(node, &sub);
-		if (ACPI_SUCCESS(status)) {
-			info_size += sub->length;
-			valid |= ACPI_VALID_SUB;
-		}
-
 		/* Execute the Device._CID method */
 
 		status = acpi_ut_execute_CID(node, &cid_list);
@@ -456,9 +446,8 @@ acpi_get_object_info(acpi_handle handle,
 	}
 
 	/*
-	 * Copy the HID, UID, SUB, and CIDs to the return buffer.
-	 * The variable-length strings are copied to the reserved area
-	 * at the end of the buffer.
+	 * Copy the HID, UID, and CIDs to the return buffer. The variable-length
+	 * strings are copied to the reserved area at the end of the buffer.
 	 *
 	 * For HID and CID, check if the ID is a PCI Root Bridge.
 	 */
@@ -476,11 +465,6 @@ acpi_get_object_info(acpi_handle handle,
 							uid, next_id_string);
 	}
 
-	if (sub) {
-		next_id_string = acpi_ns_copy_device_id(&info->subsystem_id,
-							sub, next_id_string);
-	}
-
 	if (cid_list) {
 		info->compatible_id_list.count = cid_list->count;
 		info->compatible_id_list.list_size = cid_list->list_size;
@@ -522,9 +506,6 @@ cleanup:
 	if (uid) {
 		ACPI_FREE(uid);
 	}
-	if (sub) {
-		ACPI_FREE(sub);
-	}
 	if (cid_list) {
 		ACPI_FREE(cid_list);
 	}