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authorJohn Keller <jpk@sgi.com>2006-12-19 15:56:19 -0500
committerLen Brown <len.brown@intel.com>2006-12-20 01:51:14 -0500
commit0f0fe1a08aa421266060ac67e50453a06d9ceb63 (patch)
treeadba2e86e815a35fc05b6fd5e5a55362974a444a /drivers/acpi/tables
parentf238085415c56618e042252894f2fcc971add645 (diff)
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 <ayoung@sgi.com> Cc: Greg KH <greg@kroah.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/tables')
-rw-r--r--drivers/acpi/tables/tbxface.c54
1 files changed, 53 insertions, 1 deletions
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)
123 123
124ACPI_EXPORT_SYMBOL(acpi_load_tables) 124ACPI_EXPORT_SYMBOL(acpi_load_tables)
125 125
126#ifdef ACPI_FUTURE_USAGE
127/******************************************************************************* 126/*******************************************************************************
128 * 127 *
129 * FUNCTION: acpi_load_table 128 * FUNCTION: acpi_load_table
@@ -221,6 +220,59 @@ ACPI_EXPORT_SYMBOL(acpi_load_table)
221 220
222/******************************************************************************* 221/*******************************************************************************
223 * 222 *
223 * FUNCTION: acpi_unload_table_id
224 *
225 * PARAMETERS: table_type - Type of table to be unloaded
226 * id - Owner ID of the table to be removed.
227 *
228 * RETURN: Status
229 *
230 * DESCRIPTION: This routine is used to force the unload of a table (by id)
231 *
232 ******************************************************************************/
233acpi_status acpi_unload_table_id(acpi_table_type table_type, acpi_owner_id id)
234{
235 struct acpi_table_desc *table_desc;
236 acpi_status status;
237
238 ACPI_FUNCTION_TRACE(acpi_unload_table);
239
240 /* Parameter validation */
241 if (table_type > ACPI_TABLE_ID_MAX)
242 return_ACPI_STATUS(AE_BAD_PARAMETER);
243
244 /* Find table from the requested type list */
245 table_desc = acpi_gbl_table_lists[table_type].next;
246 while (table_desc && table_desc->owner_id != id)
247 table_desc = table_desc->next;
248
249 if (!table_desc)
250 return_ACPI_STATUS(AE_NOT_EXIST);
251
252 /*
253 * Delete all namespace objects owned by this table. Note that these
254 * objects can appear anywhere in the namespace by virtue of the AML
255 * "Scope" operator. Thus, we need to track ownership by an ID, not
256 * simply a position within the hierarchy
257 */
258 acpi_ns_delete_namespace_by_owner(table_desc->owner_id);
259
260 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
261 if (ACPI_FAILURE(status))
262 return_ACPI_STATUS(status);
263
264 (void)acpi_tb_uninstall_table(table_desc);
265
266 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
267
268 return_ACPI_STATUS(AE_OK);
269}
270
271ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
272
273#ifdef ACPI_FUTURE_USAGE
274/*******************************************************************************
275 *
224 * FUNCTION: acpi_unload_table 276 * FUNCTION: acpi_unload_table
225 * 277 *
226 * PARAMETERS: table_type - Type of table to be unloaded 278 * PARAMETERS: table_type - Type of table to be unloaded