drm/vmwgfx: Set dmabuf_size when vmw_dmabuf_init is successful

From: Deepak Rawat <[email protected]>

SOU primary plane prepare_fb hook depends upon dmabuf_size to pin up BO (and not call a new vmw_dmabuf_init) when a new fb size is same as current fb. This was changed in a recent commit which is causing page_flip to fail on VM with low display memory and multi-mon failure when cycle monitors from secondary display.

---
 drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 2 ++
 1 file changed, 2 insertions(+)

index 648f8127f65a..3d667e903beb 100644
@@ -482,6 +482,8 @@ vmw_sou_primary_plane_prepare_fb(struct drm_plane *plane,
 		return ret;
 	}
 
+	vps->dmabuf_size = size;
+
 	/*
 	 * TTM already thinks the buffer is pinned, but make sure the
 	 * pin_count is upped.

2.14.3