Chris Wilson 40daac6136 drm: Make drm_connector_register() safe against multiple calls
Protect against drivers that may try to register the connector more
than once, or who try to unregister it multiple times.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Airlie <airlied@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465993109-19523-4-git-send-email-chris@chris-wilson.co.uk
2016-06-17 09:43:29 +02:00
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