radeonsi: don't call VBO prefetch with size=0

for the next commit.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

diff --git a/src/gallium/drivers/radeonsi/si_cp_dma.c b/src/gallium/drivers/radeonsi/si_cp_dma.c
index 598d5ec..ad53682 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_cp_dma.c
+++ b/src/gallium/drivers/radeonsi/si_cp_dma.c
@@ -555,7 +555,7 @@ static void cik_prefetch_shader_async(struct si_context *sctx,
 
 static void cik_prefetch_VBO_descriptors(struct si_context *sctx)
 {
-       if (!sctx->vertex_elements)
+       if (!sctx->vertex_elements || !sctx->vertex_elements->desc_list_byte_size)
                return;
 
        cik_prefetch_TC_L2_async(sctx, &sctx->vb_descriptors_buffer->b.b,