Quoting Lionel Landwerlin (2017-08-03 17:58:07)
> We were reserving fewer dwords in the ring than necessary. Indeed
> we're always writing all registers once, so discard the actual number
> of registers given by the user and just program the whitelisted ones
> once.
>
> Fixes: 19f81df2859e ("drm/i915/perf: Add OA unit support for Gen 8+")
> Reported-by: Matthew Auld <matthew.william.auld@xxxxxxxxx>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
> Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # v4.12+
For reference, if you enable CONFIG_DRM_I915_DEBUG_GEM it should catch
these mistakes (by bugging out, you are using netconsole, right?)
-Chris