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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
This commit is contained in:
Chris Wilson 2016-08-18 17:16:54 +01:00
parent e8cb909ac3
commit 9e53d9be0d
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -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;