Date: Mon, 19 Jul 2004 16:37:51 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: iedowse@maths.tcd.ie Cc: pjd@freebsd.org Subject: Re: Unloading USB driver while device is attached. Message-ID: <20040719.163751.16873514.imp@bsdimp.com> In-Reply-To: <200407191950.aa12733@salmon.maths.tcd.ie> References: <20040719175241.GJ57678@darkness.comp.waw.pl> <200407191950.aa12733@salmon.maths.tcd.ie>
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In message: <200407191950.aa12733@salmon.maths.tcd.ie>
Ian Dowse <iedowse@maths.tcd.ie> writes:
: In message <20040719175241.GJ57678@darkness.comp.waw.pl>, Pawel Jakub Dawidek w
: rites:
: >So, as I see it, device should be totally detached before unload and
: >I susspect that something is missing in USB layer, not in all drivers.
: >That's why when I load a driver again, USB thinks it is somehow connected
: >to existing device, but it isn't.
:
: I'm not sure if it will help in this particular case, but I have a
: lot of local cleanups and improvements in the USB code. There's a
: large patch at
:
: http://people.freebsd.org/~iedowse/usb.diff
:
: but unfortunately I haven't had time to work on this lately (and
: there are all the problems of divergence from NetBSD etc. if bits
: of this get committed). The (small) uhub.c changes look like they
: might possibly help in your case. With the full patch I was able
: to `kldunload usb' without crashes a while ago, but there were still
: memory leaks.
Personally, I think that divergence from NetBSD is less of a problem
than it not working at all.
Warner
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