diff options
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 45fbe95ba1f3..5458403c8249 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -63,6 +63,19 @@ int acpi_scan_add_handler(struct acpi_scan_handler *handler) return 0; } +int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, + const char *hotplug_profile_name) +{ + int error; + + error = acpi_scan_add_handler(handler); + if (error) + return error; + + acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); + return 0; +} + /* * Creates hid/cid(s) string needed for modalias and uevent * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: @@ -1690,6 +1703,52 @@ static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, return false; } +static acpi_status acpi_scan_hotplug_modify(acpi_handle handle, + u32 lvl_not_used, void *data, + void **ret_not_used) +{ + struct acpi_scan_handler *handler = data; + struct acpi_device_info *info; + bool match = false; + + if (ACPI_FAILURE(acpi_get_object_info(handle, &info))) + return AE_OK; + + if (info->valid & ACPI_VALID_HID) { + char *idstr = info->hardware_id.string; + match = acpi_scan_handler_matching(handler, idstr, NULL); + } + kfree(info); + if (!match) + return AE_OK; + + if (handler->hotplug.enabled) + acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + acpi_hotplug_notify_cb, NULL); + else + acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + acpi_hotplug_notify_cb); + + return AE_OK; +} + +void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) +{ + struct acpi_scan_handler *handler; + + if (!!hotplug->enabled == !!val) + return; + + mutex_lock(&acpi_scan_lock); + + hotplug->enabled = val; + handler = container_of(hotplug, struct acpi_scan_handler, hotplug); + acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, + acpi_scan_hotplug_modify, NULL, handler, NULL); + + mutex_unlock(&acpi_scan_lock); +} + static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, const struct acpi_device_id **matchid) { |