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Re: [PATCH v8 16/18] hw/usb/redirect-server: Stream interrupt IN endpoints
- To: Jamin Lin <jamin_lin@xxxxxxxxxxxxxx>
- From: marcandre.lureau@xxxxxxxxxx
- Date: Mon, 02 Nov 2026 18:07:30 +0400
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On Mon, 02 Nov 2026 09:22:26 +0000, Jamin Lin <jamin_lin@xxxxxxxxxxxxxx> wrote:
> Interrupt IN is not a request and an answer in usbredir. The host asks
> once with start_interrupt_receiving. After that it expects a packet
> every time the device has data.
>
> Park one IN packet on the device for each streaming endpoint. A device
> that answers USB_RET_ASYNC holds the packet and completes it when it
> has data. A device that answers USB_RET_NAK gives the packet back at
> once, so park a new one when the bus reports a wakeup on that endpoint.
> A slow timer parks one too, for a device that does not report a wakeup.
> A streamed request does not wait on the endpoint's list the way a host
> request does, because this timer already asks again.
>
> [...]
Reviewed-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
--
Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
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