intel: Flush the batch when we're about to subdata into a VBO.

This fixes the clears in openarena with the new metaops clear code, and
the new piglit vbo-subdata-sync test.

Bug #23857.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_buffer_objects.c b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
index c55c5c426e..7f6fb66d52 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -207,8 +207,12 @@ intel_bufferobj_subdata(GLcontext * ctx,
 
    if (intel_obj->sys_buffer)
       memcpy((char *)intel_obj->sys_buffer + offset, data, size);
-   else
+   else {
+      /* Flush any existing batchbuffer that might reference this data. */
+      intelFlush(ctx);
+
       dri_bo_subdata(intel_obj->buffer, offset, size, data);
+   }
 }