Merge branch 'gpe-defer' into release

[net-next-2.6.git] / drivers / acpi / acpica / utxface.c

diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index 16cc48c2744b8c9101bae0eaf8d9794c6233d936..1f484c9a6888934bd82949a86e93339c033a13a1 100644 (file)
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -110,6 +110,15 @@ acpi_status __init acpi_initialize_subsystem(void)
                return_ACPI_STATUS(status);
        }
 
+       /* Initialize the global OSI interfaces list with the static names */
+
+       status = acpi_ut_initialize_interfaces();
+       if (ACPI_FAILURE(status)) {
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "During OSI interfaces initialization"));
+               return_ACPI_STATUS(status);
+       }
+
        /* If configured, initialize the AML debugger */
 
        ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
@@ -493,6 +502,7 @@ acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
 
 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
 #endif                         /*  ACPI_FUTURE_USAGE  */
+
 /*****************************************************************************
  *
  * FUNCTION:    acpi_purge_cached_objects
@@ -516,4 +526,117 @@ acpi_status acpi_purge_cached_objects(void)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
-#endif
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_install_interface
+ *
+ * PARAMETERS:  interface_name      - The interface to install
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install an _OSI interface to the global list
+ *
+ ****************************************************************************/
+acpi_status acpi_install_interface(acpi_string interface_name)
+{
+       acpi_status status;
+       struct acpi_interface_info *interface_info;
+
+       /* Parameter validation */
+
+       if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
+               return (AE_BAD_PARAMETER);
+       }
+
+       (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+
+       /* Check if the interface name is already in the global list */
+
+       interface_info = acpi_ut_get_interface(interface_name);
+       if (interface_info) {
+               /*
+                * The interface already exists in the list. This is OK if the
+                * interface has been marked invalid -- just clear the bit.
+                */
+               if (interface_info->flags & ACPI_OSI_INVALID) {
+                       interface_info->flags &= ~ACPI_OSI_INVALID;
+                       status = AE_OK;
+               } else {
+                       status = AE_ALREADY_EXISTS;
+               }
+       } else {
+               /* New interface name, install into the global list */
+
+               status = acpi_ut_install_interface(interface_name);
+       }
+
+       acpi_os_release_mutex(acpi_gbl_osi_mutex);
+       return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_interface)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_remove_interface
+ *
+ * PARAMETERS:  interface_name      - The interface to remove
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove an _OSI interface from the global list
+ *
+ ****************************************************************************/
+acpi_status acpi_remove_interface(acpi_string interface_name)
+{
+       acpi_status status;
+
+       /* Parameter validation */
+
+       if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
+               return (AE_BAD_PARAMETER);
+       }
+
+       (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+
+       status = acpi_ut_remove_interface(interface_name);
+
+       acpi_os_release_mutex(acpi_gbl_osi_mutex);
+       return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_interface)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_install_interface_handler
+ *
+ * PARAMETERS:  Handler             - The _OSI interface handler to install
+ *                                    NULL means "remove existing handler"
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
+ *              invoked during execution of the internal implementation of
+ *              _OSI. A NULL handler simply removes any existing handler.
+ *
+ ****************************************************************************/
+acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
+{
+       acpi_status status = AE_OK;
+
+       (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+
+       if (handler && acpi_gbl_interface_handler) {
+               status = AE_ALREADY_EXISTS;
+       } else {
+               acpi_gbl_interface_handler = handler;
+       }
+
+       acpi_os_release_mutex(acpi_gbl_osi_mutex);
+       return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
+#endif                         /* !ACPI_ASL_COMPILER */