[PATCH] RFT gem_mmap_gtt/gdg Throw in a wmb

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---
 drivers/gpu/drm/i915/i915_gem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 89bf5d67cb74..4c26e1fed6c6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2089,6 +2089,7 @@ int i915_gem_fault(struct vm_fault *vmf)
 	GEM_BUG_ON(!obj->userfault_count);
 
 	i915_vma_set_ggtt_write(vma);
+	wmb();
 
 err_fence:
 	i915_vma_unpin_fence(vma);
-- 
2.17.0

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