[Intel-gfx] [PATCH] drm/i915: Don't deballoon unused ggtt drm_mm_node in linux guest

[Chris Wilson]

Quoting Xiong Zhang (2018-03-29 11:58:41)
> Four drm_mm_node are used to reserve guest ggtt space, but some of them
> may aren't initialized and used in intel_vgt_balloon(), so these unused

may be skipped and not initialised due to space constraints, 

> drm_mm_node couldn't be removed through drm_mm_remove_node().
> 
> Fixes: ff8f797557c7("drm/i915: return the correct usable aperture size under gvt environment")
> Signed-off-by: Xiong Zhang <xiong.y.zhang at intel.com>

Had to read through and work out what the problem was; whether it was
a bug elsewhere in vgpu or deliberate, so amending the commit msg to be
clear would be helpful.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

Who actually consumes bl_info? It just looks like being a balloon being
set adrift.
-Chris