From 3362a6badb4fe75e198885b125b21ccf846861b4 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Thu, 21 May 2009 11:03:29 +0800 Subject: ACPICA: Region deletion: Ensure region object is removed from handler list Prevents a possible fault when a dynamic operation region is deleted. ACPICA BZ 507. http://acpica.org/bugzilla/show_bug.cgi?id=507 Signed-off-by: Lin Ming Signed-off-by: Bob Moore Signed-off-by: Len Brown --- drivers/acpi/acpica/utdelete.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c index a5ee23bc4f55..bc1710315088 100644 --- a/drivers/acpi/acpica/utdelete.c +++ b/drivers/acpi/acpica/utdelete.c @@ -75,6 +75,7 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) union acpi_operand_object *handler_desc; union acpi_operand_object *second_desc; union acpi_operand_object *next_desc; + union acpi_operand_object **last_obj_ptr; ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); @@ -223,6 +224,26 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) */ handler_desc = object->region.handler; if (handler_desc) { + next_desc = + handler_desc->address_space.region_list; + last_obj_ptr = + &handler_desc->address_space.region_list; + + /* Remove the region object from the handler's list */ + + while (next_desc) { + if (next_desc == object) { + *last_obj_ptr = + next_desc->region.next; + break; + } + + /* Walk the linked list of handler */ + + last_obj_ptr = &next_desc->region.next; + next_desc = next_desc->region.next; + } + if (handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { -- cgit v1.2.3-59-g8ed1b