drm: add unpin function to prime helpers
authorMaarten Lankhorst <maarten.lankhorst@canonical.com>
Tue, 9 Apr 2013 07:18:44 +0000 (09:18 +0200)
committerDave Airlie <airlied@redhat.com>
Mon, 10 Jun 2013 21:51:11 +0000 (07:51 +1000)
Prevents buffers from being pinned forever.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

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