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Date: Sun, 7 Apr 2002 21:53:52 -0600
From: Scott Long <scott_long@btc.adaptec.com>
To: Josef Karthauser <joe@freebsd.org>
Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org
Subject: Re: cvs commit: src/sys/dev/usb uhci.c
Message-ID: <20020408035351.GA6762@hollin.btc.adaptec.com>
References: <200204071803.g37I3jj44027@freefall.freebsd.org>
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On Sun, Apr 07, 2002 at 11:03:45AM -0700, Josef Karthauser wrote:
> joe         2002/04/07 11:03:45 PDT
> 
>   Modified files:
>     sys/dev/usb          uhci.c 
>   Log:
>   MFNetBSD:
>       revision 1.153
>       date: 2002/02/11 11:40:33;  author: augustss;  state: Exp;  lines: +67 -26
>       Switch to the same abort mechanism as in [eo]hci; it should be more
>       robust.
>   
>   Revision  Changes    Path
>   1.114     +67 -23    src/sys/dev/usb/uhci.c

Joe,

This change (or actually, this group of changes) changes the behaviour of
the ums lockup problem.  Now, when I physically detach the device, the
detach never completes in the ums driver.   I haven't tracked it down
yet, but I suspect that ums_detach is never even being called.  In fact,
usbdevs reports that the device is still connected.  However, if I
kldunload the ums driver ums_detach does get called, and further down
the abort callstack there is a panic.  I'll send you all of the relevant
debugger info if you are interested.

Scott

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