diff options
| -rw-r--r-- | drivers/base/core.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 4c5be85016b6..356dd011b8f9 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1734,10 +1734,25 @@ EXPORT_SYMBOL_GPL(device_move); */ void device_shutdown(void) { - struct device *dev, *devn; + struct device *dev; + + spin_lock(&devices_kset->list_lock); + /* + * Walk the devices list backward, shutting down each in turn. + * Beware that device unplug events may also start pulling + * devices offline, even as the system is shutting down. + */ + while (!list_empty(&devices_kset->list)) { + dev = list_entry(devices_kset->list.prev, struct device, + kobj.entry); + get_device(dev); + /* + * Make sure the device is off the kset list, in the + * event that dev->*->shutdown() doesn't remove it. + */ + list_del_init(&dev->kobj.entry); + spin_unlock(&devices_kset->list_lock); - list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list, - kobj.entry) { if (dev->bus && dev->bus->shutdown) { dev_dbg(dev, "shutdown\n"); dev->bus->shutdown(dev); @@ -1745,6 +1760,10 @@ void device_shutdown(void) dev_dbg(dev, "shutdown\n"); dev->driver->shutdown(dev); } + put_device(dev); + + spin_lock(&devices_kset->list_lock); } + spin_unlock(&devices_kset->list_lock); async_synchronize_full(); } |