提交 ae7d49d8 编写于 作者: C Chris Wilson 提交者: Eric Anholt

drm/i915: Emit a backtrace if we attempt to rebind a pinned buffer

This debugging trace was useful for finding the fbcon regression on
i965, and it may prove useful again in future.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NEric Anholt <eric@anholt.net>
上级 87f8ebf3
......@@ -4198,6 +4198,10 @@ i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment)
if (alignment == 0)
alignment = i915_gem_get_gtt_alignment(obj);
if (obj_priv->gtt_offset & (alignment - 1)) {
WARN(obj_priv->pin_count,
"bo is already pinned with incorrect alignment:"
" offset=%x, req.alignment=%x\n",
obj_priv->gtt_offset, alignment);
ret = i915_gem_object_unbind(obj);
if (ret)
return ret;
......
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