Re: [PATCH v3] usb: mtu3: wait for TX FIFO to drain before disconnect

On Mon Jul 20, 2026 at 10:03 AM CEST, Carlo Caione wrote:
> Fastboot unregisters the USB gadget from the completion callback of
> its final OKAY response. MTU3 QMU can report that request complete
> while bytes remain in the endpoint TX FIFO. Disabling the USB function
> immediately can therefore disconnect the host before it receives the
> response.
>
> Before selecting the high-speed or SuperSpeed disconnect operation, poll
> the FIFO state of enabled IN endpoints that have no pending requests.
> Bound the wait to 1 ms. If a FIFO does not drain, reset its endpoint,
> force the disconnect, and propagate -ETIMEDOUT through the gadget pullup
> operation. Endpoints with pending requests are skipped so an ordinary
> disconnect does not wait for an active transfer.

[...]

Hi Marek,
can you PTAL? Thanks,

--
Carlo Caione