[Intel-gfx] [PATCH] drm/i915: make pool objects read-only

[Chris Wilson]

Quoting Matthew Auld (2019-11-19 15:01:54)
> For our current users we don't expect pool objects to be writable from
> the gpu.
> 

Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris