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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - GPU HANG: ecode 8:1:0xd0bfc51f"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108093#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - GPU HANG: ecode 8:1:0xd0bfc51f"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108093">bug 108093</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>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);
/*</pre>
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