read timeout while URBs are in-flight
- Interrupt IN transfers now retry with 1s intervals (up to 5 min)
instead of returning an error on timeout. Previously, nusb's 1s
timeout caused a cancelled transfer error (-ENOENT) which told the
kernel the endpoint was intentionally shut down, killing HID.
- Release the nusb Interface Mutex before blocking on interrupt and
ISO transfers so other URBs on the same interface aren't starved.
- URB read timeout now skips when in-flight URBs exist (e.g. pending
interrupt transfers), preventing false idle disconnects.
- Use appropriate timeouts per transfer type: interrupt=5min,
isochronous=5s, control/bulk=1s.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Davíð Steinn Geirsson
9250c062aa