From 0f0fe1a08aa421266060ac67e50453a06d9ceb63 Mon Sep 17 00:00:00 2001 From: John Keller Date: Tue, 19 Dec 2006 12:56:19 -0800 Subject: ACPI: Add support for acpi_load_table/acpi_unload_table_id Make acpi_load_table() available for use by removing it from the #ifdef ACPI_FUTURE_USAGE. Also add a new routine used to unload an ACPI table of a given type and "id" - acpi_unload_table_id(). The implementation of this new routine was almost a direct copy of existing routine acpi_unload_table() - only difference being that it only removes a specific table id instead of ALL tables of a given type. The SN hotplug driver (sgi_hotplug.c) now uses both of these interfaces to dynamically load and unload SSDT ACPI tables. Also, a few other ACPI routines now used by the SN hotplug driver are exported (since the driver can be a loadable module): acpi_ns_map_handle_to_node acpi_ns_convert_entry_to_handle acpi_ns_get_next_node Signed-off-by: Aaron Young Cc: Greg KH Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/acpi/tables/tbxface.c | 54 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c index 7767987be15a..5ba9303293ad 100644 --- a/drivers/acpi/tables/tbxface.c +++ b/drivers/acpi/tables/tbxface.c @@ -123,7 +123,6 @@ acpi_status acpi_load_tables(void) ACPI_EXPORT_SYMBOL(acpi_load_tables) -#ifdef ACPI_FUTURE_USAGE /******************************************************************************* * * FUNCTION: acpi_load_table @@ -219,6 +218,59 @@ acpi_status acpi_load_table(struct acpi_table_header *table_ptr) ACPI_EXPORT_SYMBOL(acpi_load_table) +/******************************************************************************* + * + * FUNCTION: acpi_unload_table_id + * + * PARAMETERS: table_type - Type of table to be unloaded + * id - Owner ID of the table to be removed. + * + * RETURN: Status + * + * DESCRIPTION: This routine is used to force the unload of a table (by id) + * + ******************************************************************************/ +acpi_status acpi_unload_table_id(acpi_table_type table_type, acpi_owner_id id) +{ + struct acpi_table_desc *table_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_unload_table); + + /* Parameter validation */ + if (table_type > ACPI_TABLE_ID_MAX) + return_ACPI_STATUS(AE_BAD_PARAMETER); + + /* Find table from the requested type list */ + table_desc = acpi_gbl_table_lists[table_type].next; + while (table_desc && table_desc->owner_id != id) + table_desc = table_desc->next; + + if (!table_desc) + return_ACPI_STATUS(AE_NOT_EXIST); + + /* + * Delete all namespace objects owned by this table. Note that these + * objects can appear anywhere in the namespace by virtue of the AML + * "Scope" operator. Thus, we need to track ownership by an ID, not + * simply a position within the hierarchy + */ + acpi_ns_delete_namespace_by_owner(table_desc->owner_id); + + status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); + if (ACPI_FAILURE(status)) + return_ACPI_STATUS(status); + + (void)acpi_tb_uninstall_table(table_desc); + + (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + + return_ACPI_STATUS(AE_OK); +} + +ACPI_EXPORT_SYMBOL(acpi_unload_table_id) + +#ifdef ACPI_FUTURE_USAGE /******************************************************************************* * * FUNCTION: acpi_unload_table -- cgit v1.2.2