Merge branch 'for-2.6.26' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer...

[linux-2.6] / drivers / acpi / tables / tbxface.c

diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index 5b302c4e293f78dd734e9c322a6551f03c01b493..fb57b93c24953cc1cc83e3f822a23a94e88a89d5 100644 (file)
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,6 +52,8 @@ ACPI_MODULE_NAME("tbxface")
 /* Local prototypes */
 static acpi_status acpi_tb_load_namespace(void);
 
+static int no_auto_ssdt;
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_allocate_root_table
@@ -536,6 +538,10 @@ static acpi_status acpi_tb_load_namespace(void)
 
                ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS"));
                acpi_tb_print_table_header(0, table);
+
+               if (no_auto_ssdt == 0) {
+                       printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"");
+               }
        }
 
        status =
@@ -577,6 +583,11 @@ static acpi_status acpi_tb_load_namespace(void)
                        continue;
                }
 
+               if (no_auto_ssdt) {
+                       printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
+                       continue;
+               }
+
                /* Ignore errors while loading tables, get as many as possible */
 
                (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
@@ -622,3 +633,104 @@ acpi_status acpi_load_tables(void)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_load_tables)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_table_handler
+ *
+ * PARAMETERS:  Handler         - Table event handler
+ *              Context         - Value passed to the handler on each event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install table event handler
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_table_handler(acpi_tbl_handler handler, void *context)
+{
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(acpi_install_table_handler);
+
+       if (!handler) {
+               return_ACPI_STATUS(AE_BAD_PARAMETER);
+       }
+
+       status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       /* Don't allow more than one handler */
+
+       if (acpi_gbl_table_handler) {
+               status = AE_ALREADY_EXISTS;
+               goto cleanup;
+       }
+
+       /* Install the handler */
+
+       acpi_gbl_table_handler = handler;
+       acpi_gbl_table_handler_context = context;
+
+      cleanup:
+       (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+       return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_table_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_table_handler
+ *
+ * PARAMETERS:  Handler         - Table event handler that was installed
+ *                                previously.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove table event handler
+ *
+ ******************************************************************************/
+acpi_status acpi_remove_table_handler(acpi_tbl_handler handler)
+{
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(acpi_remove_table_handler);
+
+       status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       /* Make sure that the installed handler is the same */
+
+       if (!handler || handler != acpi_gbl_table_handler) {
+               status = AE_BAD_PARAMETER;
+               goto cleanup;
+       }
+
+       /* Remove the handler */
+
+       acpi_gbl_table_handler = NULL;
+
+      cleanup:
+       (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+       return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_table_handler)
+
+
+static int __init acpi_no_auto_ssdt_setup(char *s) {
+
+        printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
+
+        no_auto_ssdt = 1;
+
+        return 1;
+}
+
+__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);