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Commit ae7d49d8 authored by Chris Wilson's avatar Chris Wilson Committed by Eric Anholt
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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: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 87f8ebf3

drivers/gpu/drm/i915/i915_gem.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -4198,6 +4198,10 @@ i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment) 
		if (alignment == 0)

		if (alignment == 0)

			alignment = i915_gem_get_gtt_alignment(obj);

			alignment = i915_gem_get_gtt_alignment(obj);

		if (obj_priv->gtt_offset & (alignment - 1)) {

		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);

			ret = i915_gem_object_unbind(obj);

			if (ret)

			if (ret)

				return ret;

				return ret;