From 347cf10aed1657a2b385a95f92763a67062c5ad3 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 25 Mar 2014 14:38:44 +1000
Subject: [PATCH] drm/udl: take reference to device struct for dma-bufs

this stops the device from being deleted before all the dma-bufs
on it are freed, this fixes an oops when you unplug a udl device while
it has imported a buffer from another device.

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