[Intel-gfx] [PATCH] intel: GetBuffer fix

[Ben Widawsky]

After copy buffer on preGEN6, it is necessary to wait for the blit to
complete before returning data to the user.

This fixes the piglit test: copy_buffer_coherency.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 src/mesa/drivers/dri/intel/intel_buffer_objects.c |    7 ++++++-
 1 files changed, 6 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 439d6fc..703300b 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -282,12 +282,17 @@ intel_bufferobj_get_subdata(struct gl_context * ctx,
                             GLvoid * data, struct gl_buffer_object *obj)
 {
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+   struct intel_context *intel = intel_context(ctx);
 
    assert(intel_obj);
    if (intel_obj->sys_buffer)
       memcpy(data, (char *)intel_obj->sys_buffer + offset, size);
-   else
+   else {
+      if (drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) {
+	 intel_batchbuffer_flush(intel);
+      }
       drm_intel_bo_get_subdata(intel_obj->buffer, offset, size, data);
+   }
 }
 
 
-- 
1.7.6