1 files changed, 31 insertions, 8 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..3b7015b5ad 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -207,8 +207,26 @@ intel_bufferobj_subdata(GLcontext * ctx,
 
    if (intel_obj->sys_buffer)
       memcpy((char *)intel_obj->sys_buffer + offset, data, size);
-   else
-      dri_bo_subdata(intel_obj->buffer, offset, size, data);
+   else {
+      /* Flush any existing batchbuffer that might reference this data. */
+      if (drm_intel_bo_busy(intel_obj->buffer) ||
+	  drm_intel_bo_references(intel->batch->buf, intel_obj->buffer)) {
+	 drm_intel_bo *temp_bo;
+
+	 temp_bo = drm_intel_bo_alloc(intel->bufmgr, "subdata temp", size, 64);
+
+	 drm_intel_bo_subdata(temp_bo, 0, size, data);
+
+	 intel_emit_linear_blit(intel,
+				intel_obj->buffer, offset,
+				temp_bo, 0,
+				size);
+
+	 drm_intel_bo_unreference(temp_bo);
+      } else {
+	 dri_bo_subdata(intel_obj->buffer, offset, size, data);
+      }
+   }
 }
 
 
@@ -225,7 +243,10 @@ intel_bufferobj_get_subdata(GLcontext * ctx,
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 
    assert(intel_obj);
-   dri_bo_get_subdata(intel_obj->buffer, offset, size, data);
+   if (intel_obj->sys_buffer)
+      memcpy(data, (char *)intel_obj->sys_buffer + offset, size);
+   else
+      dri_bo_get_subdata(intel_obj->buffer, offset, size, data);
 }
 
 
@@ -247,13 +268,14 @@ intel_bufferobj_map(GLcontext * ctx,
 
    if (intel_obj->sys_buffer) {
       obj->Pointer = intel_obj->sys_buffer;
+      obj->Length = obj->Size;
+      obj->Offset = 0;
       return obj->Pointer;
    }
 
-   /* Flush any existing batchbuffer that might have written to this
-    * buffer.
-    */
-   intelFlush(ctx);
+   /* Flush any existing batchbuffer that might reference this data. */
+   if (drm_intel_bo_references(intel->batch->buf, intel_obj->buffer))
+      intelFlush(ctx);
 
    if (intel_obj->region)
       intel_bufferobj_cow(intel, intel_obj);
@@ -323,7 +345,8 @@ intel_bufferobj_map_range(GLcontext * ctx,
     * the batchbuffer so that GEM knows about the buffer access for later
     * syncing.
     */
-   if (!(access & GL_MAP_UNSYNCHRONIZED_BIT))
+   if (!(access & GL_MAP_UNSYNCHRONIZED_BIT) &&
+       drm_intel_bo_references(intel->batch->buf, intel_obj->buffer))
       intelFlush(ctx);
 
    if (intel_obj->buffer == NULL) {