sna/dri2: Flush rendering to a reused front buffer before reporting

When the client calls DRI2GetBuffers it expects the buffer to be
coherent, that is all X rendering to it flushed to hardware for it to be
able to read back.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/sna/sna_dri2.c b/src/sna/sna_dri2.c
index 47bd2edc..2c3a3ed7 100644
--- a/src/sna/sna_dri2.c
+++ b/src/sna/sna_dri2.c
@@ -643,6 +643,7 @@ sna_dri2_create_buffer(DrawablePtr draw,
 			assert(private->bo->pitch == buffer->pitch);
 			assert(private->bo->active_scanout);
 
+			kgem_bo_submit(&sna->kgem, private->bo);
 			private->refcnt++;
 			return buffer;
 		}