From: Chris Wilson Date: Thu, 9 Feb 2017 11:19:33 +0000 (+0000) Subject: drm/i915: Assert that we never create a vma for the aliasing_ppgtt X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=e1cc3db020c7ef864b7aa02d5e193a110f8f3450;p=openwrt%2Fstaging%2Fblogic.git 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: Chris Wilson Cc: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20170209111933.12420-1-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen --- diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 155906e84812..e75494c1ef52 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -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);