ACPICA: Fix reference count issues for DdbHandle object
Fix a problem where the DdbHandle could be prematurely deleted,
possibly causing a fault.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 3deb20a..c0348ff 100644
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -229,6 +229,8 @@
walk_state);
if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle);
+
+ acpi_ut_remove_reference(ddb_handle);
return_ACPI_STATUS(status);
}
}
@@ -454,6 +456,10 @@
return_ACPI_STATUS(status);
}
+ /* Remove the reference by added by acpi_ex_store above */
+
+ acpi_ut_remove_reference(ddb_handle);
+
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
@@ -530,8 +536,5 @@
(void)acpi_tb_release_owner_id(table_index);
acpi_tb_set_table_loaded_flag(table_index, FALSE);
- /* Table unloaded, remove a reference to the ddb_handle object */
-
- acpi_ut_remove_reference(ddb_handle);
return_ACPI_STATUS(AE_OK);
}