usb/138659: uftdi driver broken in RELENG_8/CURRENT

[Tomas Verbaitis]

>Number:         138659
>Category:       usb
>Synopsis:       uftdi driver broken in RELENG_8/CURRENT
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 09 12:40:00 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Tomas Verbaitis
>Release:        8-BETA4 9-CURRENT
>Organization:
Megalogika Ltd
>Environment:
8.0-BETA4 FreeBSD 8.0-BETA4 #19: Wed Sep  9 12:41:06 EEST 2009
 8.0-BETA2 FreeBSD 8.0-BETA2 #13: Wed Aug 19 11:40:46 EEST 2009
 9.0-CURRENT FreeBSD 9.0-CURRENT #73: Tue Sep  1 16:54:15 EEST 2009
>Description:
www/kannel use to run perfectly with two, three or four Teltonika ModemUSB/G10 USB modems connected. uftdi(4) driver was attaching to these modems.

after i upgraded one of the machines to then 8-CURRENT on Aug 19 2009, i noticed the following problems:
 - only single device appears to be responsive right after start of kannel
 - even that device is answering requests slower and slower until it stalls completely within 1 hour
>How-To-Repeat:
run www/kannel with 1 or 2 Teltonika ModemUSB/G10 attached to a machine running FreeBSD RELENG_8 or CURRENT
>Fix:
no idea :(

7.x still worked ok, so i suspect, that it must be related to USB2

>Release-Note:
>Audit-Trail:
>Unformatted: