static LIST_HEAD(acpi_device_list);
static LIST_HEAD(acpi_bus_id_list);
+static DEFINE_MUTEX(acpi_scan_lock);
DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Hot-removing device %s...\n", dev_name(&device->dev)));
- if (acpi_bus_trim(device)) {
- printk(KERN_ERR PREFIX
- "Removing device failed\n");
- goto err_out;
- }
-
- /* device has been freed */
+ acpi_bus_trim(device);
+ /* Device node has been released. */
device = NULL;
/* power off device */
int acpi_bus_scan(acpi_handle handle)
{
void *device = NULL;
+ int error = 0;
+
+ mutex_lock(&acpi_scan_lock);
if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device)))
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
acpi_bus_check_add, NULL, NULL, &device);
if (!device)
- return -ENODEV;
-
- if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL)))
+ error = -ENODEV;
+ else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL)))
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
acpi_bus_device_attach, NULL, NULL, NULL);
- return 0;
+ mutex_unlock(&acpi_scan_lock);
+ return error;
}
EXPORT_SYMBOL(acpi_bus_scan);
return AE_OK;
}
-int acpi_bus_trim(struct acpi_device *start)
+void acpi_bus_trim(struct acpi_device *start)
{
+ mutex_lock(&acpi_scan_lock);
+
/*
* Execute acpi_bus_device_detach() as a post-order callback to detach
* all ACPI drivers from the device nodes being removed.
acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL,
acpi_bus_remove, NULL, NULL);
acpi_bus_remove(start->handle, 0, NULL, NULL);
- return 0;
+
+ mutex_unlock(&acpi_scan_lock);
}
EXPORT_SYMBOL_GPL(acpi_bus_trim);
/* this shouldn't be in here, so remove
* the bus then re-add it...
*/
- ret_val = acpi_bus_trim(device);
- dbg("acpi_bus_trim return %x\n", ret_val);
+ acpi_bus_trim(device);
}
ret_val = acpi_bus_scan(func->handle);
return retval;
}
- retval = acpi_bus_trim(device);
- if (retval)
- err("cannot remove from acpi list\n");
-
- return retval;
+ acpi_bus_trim(device);
+ return 0;
}
static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_hot_remove_device(void *context);
-int acpi_bus_trim(struct acpi_device *start);
+void acpi_bus_trim(struct acpi_device *start);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);