[Intel-gfx] [PATCH 6/6] drm/i915: Assert that created vma has a whole number of pages

[Chris Wilson]

VMA (and their objects) are supposed to composed of whole pages. Add an
assert to catch any invalid construct when we create the VMA.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_vma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index ecb495b1c5d3..559966dc3d35 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -110,6 +110,8 @@ vma_create(struct drm_i915_gem_object *obj,
 	if (unlikely(vma->size > vm->total))
 		goto err_vma;
 
+	GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE));
+
 	if (i915_is_ggtt(vm)) {
 		if (unlikely(overflows_type(vma->size, u32)))
 			goto err_vma;
-- 
2.11.0