NetBSD Problem Report #24788

Received: (qmail 24666 invoked by uid 605); 15 Mar 2004 16:59:59 -0000
Message-Id: <>
Date: Mon, 15 Mar 2004 11:01:36 -0500 (EST)
Subject: uvisor/ucom can hard-wedge a system
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>Number:         24788
>Category:       kern
>Synopsis:       uvisor/ucom can hang a system
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 15 17:00:00 +0000 2004
>Originator:     Nathan J. Williams
>Release:        NetBSD 1.6ZK
	Massachvsetts Institvte of Technology
System: NetBSD 1.6ZK NetBSD 1.6ZK (MARVIN) #72: Mon Feb 16 11:11:22 EST 2004 i386
Architecture: i386
Machine: i386

Sometimes, use of the uvisor/ucom drivers (with a Palm Tungsten T)
will wedge the system hard. The hang occurs after the attach of ucom
and either before or just as a userland process (pilot-link) tries to
start communicating. The system is wedged hard enough that one can not
break into the debugger. 

This has been observed for several months on several machines; the
current one on a ehci/ohci interface, but also on an alpha with a
plain ohci.

ehci0: handing over full speed device on port 2 to ohci0
uhub2: port 2, device disappeared after reset
uvisor0 at uhub1 port 1 
uvisor0: Palm, Inc. Palm Handheld, r
ucom0 at uvisor0 portno 0: portno 0, sync


Frequently sync a USB Palm device. Cancelling a prior sync and
restarting seems to make it happen more often, but still not entirely


Unknown. Missing spl(x) in some error case?


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