[PATCH] drm: call drm_device_set_unplugged in drm_put_dev

[Maarten Lankhorst]

This prevents the device from being reopened after drm_put_dev is called.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com

---
XXX:

The lifetime of various objects and files still look hairy. Wouldn't it make 
more sense to split up teardown?

- set unplugged state
- remove all drm device nodes from the system
- make sure all outstanding userspace open/close/ioctl calls to the device 
nodes are finished, does vfs have something for this?
- normal cleanup, call lastclose/unload, free all stuff

diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 7d30802..e575c81 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -449,6 +449,8 @@ void drm_put_dev(struct drm_device *dev)
        }
        driver = dev->driver;

+       drm_device_set_unplugged(dev);
+
        drm_lastclose(dev);

        if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
@@ -499,11 +501,10 @@ void drm_unplug_dev(struct drm_device *dev)

        mutex_lock(&drm_global_mutex);

-       drm_device_set_unplugged(dev);
-
-       if (dev->open_count == 0) {
+       if (dev->open_count)
+               drm_device_set_unplugged(dev);
+       else
                drm_put_dev(dev);
-       }
        mutex_unlock(&drm_global_mutex);
 }
 EXPORT_SYMBOL(drm_unplug_dev);