Re: port-i386/57662: StarTech ICUSB23208FD 8-Port USB-to-Serial Adapter Hub fails on Alix with NetBSD/i386 9.3

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Sat, 28 Oct 2023 22:26:06 +0200
> From: Alexander Schreiber <als%thangorodrim.ch@localhost>
> 
> Both patches applied and things do look better. Now, instead of hanging
> forever, after the second (so, at the third) connection attempt, cu
> errors out with: "cu: link down" after a few seconds. This behavior then
> sticks.
> 
> Relevant snippet from the trace:
> 
>   1699   1699 cu       0.000010616 CALL  open(0xbfb9a56e,6,0)
>   1699   1699 cu       0.000011733 NAMI  "/dev/ttyU1"
>   1699   1699 cu       11.991814027 RET   open -1 errno 5 Input/output error
> 
> vmstat usbhist dump at:
> 
> https://www.thangorodrim.ch/tmp/NetBSD10BETA_serial_vmstat-usbhist_patch-1

Great, thanks!  So we've fixed the logic to abort on timeout that I
broke last year (which is good!), but now we have to figure out why
the transfer is timing out at all.