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path: root/drivers/acpi/system.c
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Diffstat (limited to 'drivers/acpi/system.c')
-rw-r--r--drivers/acpi/system.c64
1 files changed, 50 insertions, 14 deletions
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 391d0358a59..da51f05ef8d 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -33,10 +33,6 @@
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("system");
-#ifdef MODULE_PARAM_PREFIX
-#undef MODULE_PARAM_PREFIX
-#endif
-#define MODULE_PARAM_PREFIX "acpi."
#define ACPI_SYSTEM_CLASS "system"
#define ACPI_SYSTEM_DEVICE_NAME "System"
@@ -62,6 +58,7 @@ module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
-------------------------------------------------------------------------- */
static LIST_HEAD(acpi_table_attr_list);
static struct kobject *tables_kobj;
+static struct kobject *dynamic_tables_kobj;
struct acpi_table_attr {
struct bin_attribute attr;
@@ -128,6 +125,40 @@ static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
return;
}
+static acpi_status
+acpi_sysfs_table_handler(u32 event, void *table, void *context)
+{
+ struct acpi_table_attr *table_attr;
+
+ switch (event) {
+ case ACPI_TABLE_EVENT_LOAD:
+ table_attr =
+ kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
+ if (!table_attr)
+ return AE_NO_MEMORY;
+
+ acpi_table_attr_init(table_attr, table);
+ if (sysfs_create_bin_file(dynamic_tables_kobj,
+ &table_attr->attr)) {
+ kfree(table_attr);
+ return AE_ERROR;
+ } else
+ list_add_tail(&table_attr->node,
+ &acpi_table_attr_list);
+ break;
+ case ACPI_TABLE_EVENT_UNLOAD:
+ /*
+ * we do not need to do anything right now
+ * because the table is not deleted from the
+ * global table list when unloading it.
+ */
+ break;
+ default:
+ return AE_BAD_PARAMETER;
+ }
+ return AE_OK;
+}
+
static int acpi_system_sysfs_init(void)
{
struct acpi_table_attr *table_attr;
@@ -137,7 +168,11 @@ static int acpi_system_sysfs_init(void)
tables_kobj = kobject_create_and_add("tables", acpi_kobj);
if (!tables_kobj)
- return -ENOMEM;
+ goto err;
+
+ dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
+ if (!dynamic_tables_kobj)
+ goto err_dynamic_tables;
do {
result = acpi_get_table_by_index(table_index, &table_header);
@@ -162,8 +197,14 @@ static int acpi_system_sysfs_init(void)
}
} while (!result);
kobject_uevent(tables_kobj, KOBJ_ADD);
-
- return 0;
+ kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
+ result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
+
+ return result == AE_OK ? 0 : -EINVAL;
+err_dynamic_tables:
+ kobject_put(tables_kobj);
+err:
+ return -ENOMEM;
}
/*
@@ -571,12 +612,9 @@ static int acpi_system_procfs_init(void)
}
#endif
-static int __init acpi_system_init(void)
+int __init acpi_system_init(void)
{
- int result = 0;
-
- if (acpi_disabled)
- return 0;
+ int result;
result = acpi_system_procfs_init();
if (result)
@@ -586,5 +624,3 @@ static int __init acpi_system_init(void)
return result;
}
-
-subsys_initcall(acpi_system_init);