On a Wednesday in 2022, Daniel P. Berrangé wrote:
>The -device JSON syntax impl leaks a reference on the created
>DeviceState instance. As a result when you hot-unplug the
>device, the device_finalize method won't be called and thus
>it will fail to emit the required DEVICE_DELETED event.
>
>A 'json-cli' feature was previously added against the
>'device_add' QMP command QAPI schema to indicated to mgmt
>apps that -device supported JSON syntax. Given the hotplug
>bug that feature flag is no unusable for its purpose, so
>we add a new 'json-cli-hotplug' feature to indicate the
>-device supports JSON without breaking hotplug.
>
>Fixes: https://gitlab.com/qemu-project/qemu/-/issues/802
>Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
>---
> qapi/qdev.json                 |  5 ++++-
> softmmu/vl.c                   |  4 +++-
> tests/qtest/device-plug-test.c | 19 +++++++++++++++++++
> 3 files changed, 26 insertions(+), 2 deletions(-)
>

Tested-by: Ján Tomko <jtomko@redhat.com>

Jano