drm: add usb framework

This adds an initial framework to plug USB graphics devices
into the drm/kms subsystem.

I've started writing a displaylink driver using this interface.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 0bf2c773c6c5..001273d57f2d 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -463,6 +463,7 @@ void drm_put_dev(struct drm_device *dev)
 
         drm_put_minor(&dev->primary);
 
+        list_del(&dev->driver_item);
         if (dev->devname) {
                 kfree(dev->devname);
                 dev->devname = NULL;