ACPI: use device name LNXSYBUS.xx for ACPI \_SB and \_TZ objects

Use device name "LNXSYBUS:xx" instead  of "device.xx" for ACPI objects
\_SB and \_TZ.

BTW, the original check of "handle == ACPI_ROOT_OBJECT" in statment
"else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT)"
is always false because of the code at the begin of that block.
                if (handle == ACPI_ROOT_OBJECT) {
                        acpi_add_id(pnp, ACPI_SYSTEM_HID);
                        break;
                }

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 57b053f424d1..62ec4ba7ecef 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1706,6 +1706,20 @@ static bool acpi_ibm_smbus_match(acpi_handle handle)
         return false;
 }
 
+static bool acpi_object_is_system_bus(acpi_handle handle)
+{
+        acpi_handle tmp;
+
+        if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) &&
+            tmp == handle)
+                return true;
+        if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) &&
+            tmp == handle)
+                return true;
+
+        return false;
+}
+
 static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
                                 int device_type)
 {
@@ -1757,8 +1771,10 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
                         acpi_add_id(pnp, ACPI_DOCK_HID);
                 else if (acpi_ibm_smbus_match(handle))
                         acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
-                else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
-                        acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
+                else if (list_empty(&pnp->ids) &&
+                         acpi_object_is_system_bus(handle)) {
+                        /* \_SB, \_TZ, LNXSYBUS */
+                        acpi_add_id(pnp, ACPI_BUS_HID);
                         strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
                         strcpy(pnp->device_class, ACPI_BUS_CLASS);
                 }