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

[matthew green <mrg%eterna.com.au@localhost>]

> Did that. Interestingly, what I did this time:
>  - did one cu session, terminated it normally
>  - got distracted for at least an hour
>  - did another cu session, that promptly hung
>
> invoked crash:
>
> console# crash
> Crash version 10.0_BETA, image version 10.0_BETA.
> Kernel compiled without options LOCKDEBUG.
> Output from a running system is unreliable.
> crash> ps|grep cu
> 1524  1524 3   0   1000000           c260c640                 cu usbxfer
> 0       17 3   0       200           c1eaa100           lnxrcugc lnxrcugc
> crash> bt/a c260c640
> trace: pid 1524 lid 1524 at 0xce80ab18
> sleepq_block(0,0,c14afda4,c14afda4,0,c1d43100,c1ec1808,c1d43100,c1f0ce80,c1d43100) at sleepq_block+0x138
> cv_wait(c1edbe84,c1ec1808,c1edbe78,1ee4c25,0,2,23d6c,0,ce80abf8,ce80abf8) at cv_wait+0xc6
> usbd_transfer(c1edbe78,0,0,0,ce80abb0,0,8,8,8,c1edbe78) at usbd_transfer+0x15c
> usbd_do_request_len(c1f0ce00,ce80abf8,0,0,0,0,1388,ce80ac3c,c03ed0df,c1f0ce00) at usbd_do_request_len+0xad
> usbd_do_request(c1f0ce00,ce80abf8,0,40,1,0,4af,c1eaf00c,dd313180,ce80ac70) at usbd_do_request+0x3f
> uftdi_open(c1f14340,1,0,c1ef5c00,0,0,4200,1841,0,c1ef5c00) at uftdi_open+0x4e
> ucomopen(4200,0,7,2000,c260c640,c0d28fe2,c22d17c0,0,c1f153c0,100) at ucomopen+0x307
[ ... ]
>
> I hope that is helpful. Let me know what else I can do to help.

OK, so seems like a transfer isn't completing like it should.

can you build a kernel with USB_DEBUG, UFTDI_DEBUG, which ever of
XHCI_DEBUG / UHCI_DEBUG / OHCI_DEBUG / EHCI_DEBUG the ufdti is
attached to, reboot without them plugged in, set the various
sysctl that will be eg hw.usb.debug / hw.xhci.debug / etc, to 1,
plug the devies in and try to trigger a hang.  when it hangs, use
"vmstat -u usbhist" to obtain the usb history which should provide
a bunch of useful data to what has happened.

usbd_xfer_schedule_timeout() should have setup a timeout for this,
the default would be 5 i think with this via usbd_do_request().


.mrg.