[mutter] wayland: Realize dmabuf buffers before trying to attach them

[Jonas Ådahl <jadahl src gnome org>]

commit 54709c16b56a308d2254c56a35d042bf8b8e124f
Author: Miguel A. Vico <mvicomoya nvidia com>
Date:   Thu Jun 21 04:53:15 2018 +0200

    wayland: Realize dmabuf buffers before trying to attach them
    
    Commit 22723ca37 moved buffer realization to
    meta_wayland_surface_commit() so that it wouldn't be part of
    meta_wayland_buffer_attach().
    
    However, creation of dmabuf buffers would call into
    meta_wayland_buffer_attach() directly without realizing the buffer
    first. attach() would then fail and mutter would effectively shut down
    any clients using the zwp_linux_dmabuf protocol (note that if such
    client was Xwayland, mutter itself would shut down as well).
    
    Add the missing bit in order to make zwp_linux_dmabuf protocol work
    again.

 src/wayland/meta-wayland-dma-buf.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/wayland/meta-wayland-dma-buf.c b/src/wayland/meta-wayland-dma-buf.c
index 76b8aa219..e72c53935 100644
--- a/src/wayland/meta-wayland-dma-buf.c
+++ b/src/wayland/meta-wayland-dma-buf.c
@@ -365,6 +365,7 @@ buffer_params_create_common (struct wl_client   *client,
                                   dma_buf, NULL);
   buffer = meta_wayland_buffer_from_resource (buffer_resource);
 
+  meta_wayland_buffer_realize (buffer);
   if (!meta_wayland_buffer_attach (buffer, &error))
     {
       if (buffer_id == 0)