[Bug 99948] [BDW] igt_ppgtt_shrink, OOPS gen8_ppgtt_insert_4lvl

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99948

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
Unlikely: diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
b/drivers/gpu/drm/i915/i915_gem_gtt.c
index d4ec05f58ce4..4320c9a764ed 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -910,7 +910,7 @@ static void gen8_ppgtt_insert_4lvl(struct
i915_address_space *vm,

        while (gen8_ppgtt_insert_pte_entries(ppgtt, pdps[pml4e++], &iter,
                                             start, cache_level))
-               ;
+               GEM_BUG_ON(pml4e >= GEN8_PML4ES_PER_PML4);
 }

 static void gen8_free_page_tables(struct i915_address_space *vm,

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