[Bug 108093] GPU HANG: ecode 8:1:0xd0bfc51f

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108093

--- Comment #17 from Chris Wilson <chris at chris-wilson.co.uk> ---
Sneaky suspicion:

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 7f308e713fae..2df5b8a1c988 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -111,10 +111,7 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma);

 static void gen6_ggtt_invalidate(struct drm_i915_private *dev_priv)
 {
-       /*
-        * Note that as an uncached mmio write, this will flush the
-        * WCB of the writes into the GGTT before it triggers the invalidate.
-        */
+       wmb();
        I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);

        /*

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