i915: Fix assertion failure on remapping a non-BO-backed VBO.

Failure to set the obj->Pointer back to null tripped up the assertion.
Bug #22428.

diff --git a/src/mesa/drivers/dri/intel/intel_buffer_objects.c b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
index aed0e45a28f35508c79b3814ecaed9164d923d7b..9408b0c351fc46ceaaaf51b422eef044fda0a443 100644 (file)
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -274,7 +274,10 @@ intel_bufferobj_unmap(GLcontext * ctx,
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 
    assert(intel_obj);
-   if (intel_obj->buffer != NULL) {
+   if (intel_obj->sys_buffer != NULL) {
+      assert(obj->Pointer);
+      obj->Pointer = NULL;
+   } else if (intel_obj->buffer != NULL) {
       assert(obj->Pointer);
       if (intel_obj->mapped_gtt) {
         drm_intel_gem_bo_unmap_gtt(intel_obj->buffer);