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-rw-r--r--drivers/acpi/bus.c28
-rw-r--r--include/acpi/acpi_bus.h2
2 files changed, 26 insertions, 4 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index cf925c4f36b7..8445d570f60a 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -132,6 +132,21 @@ void acpi_bus_private_data_handler(acpi_handle handle,
}
EXPORT_SYMBOL(acpi_bus_private_data_handler);
+int acpi_bus_attach_private_data(acpi_handle handle, void *data)
+{
+ acpi_status status;
+
+ status = acpi_attach_data(handle,
+ acpi_bus_private_data_handler, data);
+ if (ACPI_FAILURE(status)) {
+ acpi_handle_debug(handle, "Error attaching device data\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
+
int acpi_bus_get_private_data(acpi_handle handle, void **data)
{
acpi_status status;
@@ -140,15 +155,20 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data)
return -EINVAL;
status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
- if (ACPI_FAILURE(status) || !*data) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
- handle));
+ if (ACPI_FAILURE(status)) {
+ acpi_handle_debug(handle, "No context for object\n");
return -ENODEV;
}
return 0;
}
-EXPORT_SYMBOL(acpi_bus_get_private_data);
+EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
+
+void acpi_bus_detach_private_data(acpi_handle handle)
+{
+ acpi_detach_data(handle, acpi_bus_private_data_handler);
+}
+EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
void acpi_bus_no_hotplug(acpi_handle handle)
{
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 84a2e29a2314..d2006ca31dba 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -406,6 +406,8 @@ extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
void acpi_bus_private_data_handler(acpi_handle, void *);
int acpi_bus_get_private_data(acpi_handle, void **);
+int acpi_bus_attach_private_data(acpi_handle, void *);
+void acpi_bus_detach_private_data(acpi_handle);
void acpi_bus_no_hotplug(acpi_handle handle);
extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
extern int register_acpi_notifier(struct notifier_block *);