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ACPICA: Fix reference count issues for DdbHandle object

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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>
This commit is contained in:
Lin Ming 2009-05-21 10:29:28 +08:00 committed by Len Brown
parent 8c725bf937
commit 06366c1492
1 changed files with 6 additions and 3 deletions
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9
drivers/acpi/acpica/exconfig.c
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@ -229,6 +229,8 @@ acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
walk_state); walk_state);
if (ACPI_FAILURE(status)) { if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle); (void)acpi_ex_unload_table(ddb_handle);
acpi_ut_remove_reference(ddb_handle);
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
} }
@ -454,6 +456,10 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
return_ACPI_STATUS(status); 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 */ /* Invoke table handler if present */
if (acpi_gbl_table_handler) { if (acpi_gbl_table_handler) {
@ -530,8 +536,5 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
(void)acpi_tb_release_owner_id(table_index); (void)acpi_tb_release_owner_id(table_index);
acpi_tb_set_table_loaded_flag(table_index, FALSE); 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); return_ACPI_STATUS(AE_OK);
} }