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libxl__spawn_qdisk_backend() explicitly sets guest_config to NULL when
starting QEMU (the usual launch through libxl__spawn_local_dm() has a
guest_config though).
Bail early on a NULL guest_config/d_config. This skips the QMP queries
for chardevs and VNC, but this xenpv QEMU instance isn't expected to
provide those - only qdisk (or 9pfs backends after an upcoming change).
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
master commit: d4f3d35f04
master date: 2024-02-29 08:18:38 +0100