P0-A1 from USB-IMPLEMENTATION-PLAN.md v2. Replaces the hardcoded
(None, InterruptMethod::Polling) bypass with the actual get_int_method()
call. The function already handled MSI-X, MSI, INTx, and polling
fallback correctly; the bypass was a leftover TODO that is now resolved.
The IrqReactor::run_with_irq_file() path at irq_reactor.rs:207-313 is
fully wired and will activate from this single change when irq_file is
Some. No other code assumed polling-only semantics.
Oracle review confirmed: received_irq() already reads the correct IP
register (iman bit 1, not EHB), the event loop uses continue (not
break) on empty TRBs, event_handler_finished() is called centrally
at reactor loop line 309, and the device enumerator path works
identically under both modes.
Upstream commits e4aab167 and 7e3e841f appear to already be in the
0.1.0 baseline — verify with git log before cherry-picking. Commit
4d6581d4 (more timeouts) is recommended as a follow-up.
Red Bear OS
cbd40e0d63