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Commit e1cc3db0 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Assert that we never create a vma for the aliasing_ppgtt 



The aliasing_ppgtt is just a container for the HW context that mirrors
the global gtt. It should never be used directly, so assert if we make
the mistake of trying to allocate a VMA for it.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170209111933.12420-1-chris@chris-wilson.co.uk


Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
parent 969bb72c

drivers/gpu/drm/i915/i915_vma.c

+3 −0
Original line number Diff line number Diff line
@@ -78,6 +78,9 @@ vma_create(struct drm_i915_gem_object *obj, 
	struct rb_node *rb, **p;

	int i;



	/* The aliasing_ppgtt should never be used directly! */

	GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base);



	vma = kmem_cache_zalloc(vm->i915->vmas, GFP_KERNEL);

	if (vma == NULL)

		return ERR_PTR(-ENOMEM);