[PATCH 029/131] drm/i915: Disallow direct CPU access to stolen pages for relocations
Chris Wilson
chris at chris-wilson.co.uk
Sat Aug 6 07:35:56 UTC 2016
As we cannot access the backing pages behind stolen objects, we should
not attempt to do so for relocations.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 2af646b3fd37..3ff55a10dc12 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -283,6 +283,9 @@ static void eb_destroy(struct eb_vmas *eb)
static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
{
+ if (!i915_gem_object_has_struct_page(obj))
+ return false;
+
if (DBG_USE_CPU_RELOC)
return DBG_USE_CPU_RELOC > 0;
--
2.8.1
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