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drm/i915: Add a check that the VMA instance we lookup matches the request 

Just as added paranoia against our future-selves add another check that
the lookup/created VMA instance matches the request.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170116152131.18089-3-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
pull/392/head
Chris Wilson 2017-01-16 15:21:29 +00:00
parent 718659a630
commit 4ea9527cc0
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/i915_vma.c
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@ -242,6 +242,7 @@ i915_vma_instance(struct drm_i915_gem_object *obj,
vma = i915_vma_create(obj, vm, view);
GEM_BUG_ON(!IS_ERR(vma) && i915_vma_is_closed(vma));
GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view));
GEM_BUG_ON(!IS_ERR(vma) && i915_vma_lookup(obj, vm, view) != vma);
return vma;
}