drm/i915: WARN_ON failed map_and_fenceable

I just noticed in our code we don't really check the assertion, and
given some of the code I am changing in this area, I feel a WARN is very
nice to have.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: s/&/&&/ to fix typo on the check.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 959dffb..e414ada 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3211,6 +3211,8 @@ search_free:
        if (i915_is_ggtt(vm))
                obj->map_and_fenceable = mappable && fenceable;
 
+       WARN_ON(map_and_fenceable && !obj->map_and_fenceable);
+
        trace_i915_vma_bind(vma, map_and_fenceable);
        i915_gem_verify_gtt(dev);
        return 0;