Three changes in scheme.rs:
- Add `self_weak: Mutex<Option<Weak<DriverManagerScheme>>>` field
to the `DriverManagerScheme` struct (cfg-gated on redox, the
same pattern as the existing `handles`/`modalias_results`
fields).
- Add `set_self_weak` method that stores a `Weak`
self-reference; main.rs calls it with
`Arc::downgrade(&scheme)` after `set_manager`.
- Replace the `reset_device` arm of `dispatch_recovery`
with a detached worker that captures the manager Arc + the
scheme Weak, runs `remove_device` → `sleep 100 ms` →
`bind_device` on the worker thread, and notifies the
scheme of the rebind events via `self_weak.upgrade()`. The
scheme server thread is no longer blocked for 100 ms during
recovery; the endpoint stays responsive.
Includes a warning if `self_weak` is unset, the manager
isn't set, or the worker thread fails to launch (graceful
no-op rather than panic).
vasilito
452d738eb9