This was mostly for the i915 system-memory VBO code, which we don't have
any more, but since that existed we've ended up producing dependencies on
it being there.
---
 src/mesa/drivers/dri/i965/intel_buffer_objects.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.c 
b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
index 5f6b904..8a24727 100644
--- a/src/mesa/drivers/dri/i965/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
@@ -434,6 +434,10 @@ intel_bufferobj_buffer(struct brw_context *brw,
                        struct intel_buffer_object *intel_obj,
                       GLuint flag)
 {
+   /* This is needed so that things like transform feedback and texture buffer
+    * objects that need a BO but don't want to check that they exist for
+    * draw-time validation can just always get a BO from a GL buffer object.
+    */
    if (intel_obj->buffer == NULL)
       intel_bufferobj_alloc_buffer(brw, intel_obj);
 
-- 
1.8.4.rc3

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