Firecracker could hang if you hot-plugged a device during a guest reset
Brief
The attach path now drops one lock before it touches the bus.
Notes
753a817adc7a8b986ae34467264c523f3e55de1a (Ilias Stamatis). PR 6087. Fixes 548d79224525.
Commit 753a817adc7a8b986ae34467264c523f3e55de1a