drm/i915: Disallow direct CPU access to stolen pages for relocations
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@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-15-chris@chris-wilson.co.uk
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@ -283,6 +283,9 @@ static void eb_destroy(struct eb_vmas *eb)
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static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
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static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
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{
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{
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if (!i915_gem_object_has_struct_page(obj))
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return false;
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if (DBG_USE_CPU_RELOC)
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if (DBG_USE_CPU_RELOC)
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return DBG_USE_CPU_RELOC > 0;
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return DBG_USE_CPU_RELOC > 0;
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