on_qmp_complete tears the event loop down on any QMP error, which is the right behaviour while we're still building the VM (a missing device means we'd boot a half-configured guest). Once the boot-time setup is finished and the guest is running, killing the event loop on a QMP error means a single failed runtime command (e.g. a hotplug device_add that the guest rejects) takes the whole VM down. Consult bridge->setup_done — already flipped at the end of boot setup — and skip the event-loop exit once it's set; logging is sufficient post-setup. The bridge is fetched from the qmp client userdata, the same pointer the rest of the file uses. Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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