ttm crash on init

[tom.stdenis@xxxxxxx (Tom St Denis)]

On 2018-09-17 12:21 p.m., Tom St Denis wrote:
> (attached).  I'll try to bisect in a second.  Is anyone aware of this?
> 
> Tom

Bisection led to:

a327772a5655ff4fb104c8aae6515faa461df466 is the first bad commit
commit a327772a5655ff4fb104c8aae6515faa461df466
Author: Christian König <christian.koenig at amd.com>
Date:   Fri Sep 14 21:06:50 2018 +0200

     drm/amdgpu: drop size check

     We no don't allocate zero sized kernel BOs any longer.

     Signed-off-by: Christian König <christian.koenig at amd.com>
     Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

:040000 040000 265e4fa231d367d354e4c66600b8f98a4d2f04c4 
3702baaeb2423361dcd7eac8c533edace760ae3e M      drivers


As the culprit.

Cheers,
Tom