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

[Alexander Schreiber <als%thangorodrim.ch@localhost>]

The following reply was made to PR port-i386/57662; it has been noted by GNATS.

From: Alexander Schreiber <als%thangorodrim.ch@localhost>
To: Taylor R Campbell <riastradh%netbsd.org@localhost>
Cc: matthew green <mrg%eterna.com.au@localhost>, port-i386-maintainer%netbsd.org@localhost,
	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
	gnats-bugs%netbsd.org@localhost
Subject: Re: port-i386/57662: StarTech ICUSB23208FD 8-Port USB-to-Serial
 Adapter Hub fails on Alix with NetBSD/i386 9.3
Date: Sat, 28 Oct 2023 22:26:06 +0200

 On Sat, Oct 28, 2023 at 02:05:02AM +0000, Taylor R Campbell wrote:
 > Also: Can you try this patch on top as well?
 
 > >From fe71f2d88628e0a801d04fc4ad4b4667272c065f Mon Sep 17 00:00:00 2001
 > From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
 > Date: Sat, 28 Oct 2023 02:01:10 +0000
 > Subject: [PATCH] ehci(4): Fix bug causing missed wakeups since ehci.c 1.308.
 > 
 > For reasons beyond me now, I used cv_signal on the same cv that is
 > used to wait for the doorbell to be available _and_ to wait for the
 > host controller to acknowledge the doorbell.  Which means when the
 > host controller acknowledges the doorbell, we might wake some thread
 > waiting for the doorbell to be available -- and leave the thread
 > waiting for the doorbell acknowledgment hanging indefinitely.
 > 
 > PR port-i386/57662
 > 
 > XXX pullup-10
 > ---
 >  sys/dev/usb/ehci.c | 4 ++--
 >  1 file changed, 2 insertions(+), 2 deletions(-)
 
 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
 
 Kind regards,
            Alex.
 -- 
 "Opportunity is missed by most people because it is dressed in overalls and
  looks like work."                                      -- Thomas A. Edison