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From: Michal Mertl <mime@traveller.cz>
To: Florent Thoumie <flz@FreeBSD.org>
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Date: Sun, 22 Oct 2006 23:27:23 +0200
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Cc: freebsd-current@FreeBSD.org, Jeremie Le Hen <jeremie@le-hen.org>
Subject: Re: Cannot unload if_iwi module
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Florent Thoumie wrote:
> On Sun, 2006-10-22 at 08:43 +0200, Jeremie Le Hen wrote:
> > Hi,
> > 
> > when I try to unload if_iwi module, here is what happens:
> > 
> > % jarjarbinks:/<3>dev/iwi:118# kldunload if_iwi
> > % iwi0: detached
> > % jarjarbinks:/<3>dev/iwi:119# iwi0: <Intel(R) PRO/Wireless 2200BG> mem 0xc8218000-0xc8218fff irq 11 at device 3.0 on pci6
> > % iwi0: Ethernet address: 00:12:f0:2c:f3:6e
> > % iwi0: [GIANT-LOCKED]
> > 
> > The kld is reloaded automatically (I am sure it is reloaded because
> > the id showed in kldstat(8) changes each time):
> > 
> > % jarjarbinks:/<1>share/mk:137# kldstat
> > % Id Refs Address    Size     Name
> > %  1   20 0xc0400000 4ef910   kernel
> > %  2    1 0xc08f0000 e5dc     if_bge.ko
> > %  3    1 0xc08ff000 4ce4     ums.ko
> > %  4    1 0xc0904000 b180     umass.ko
> > %  5    2 0xc382e000 25000    linux.ko
> > %  6    1 0xc38cb000 2000     rtc.ko
> > %  9    1 0xc3acf000 e000     if_iwi.ko
> > % 10    2 0xc3add000 3000     firmware.ko
> > 
> > % jarjarbinks:/<3>dev/iwi:122# kldstat
> > % Id Refs Address    Size     Name
> > %  1   19 0xc0400000 4ef910   kernel
> > %  2    1 0xc08f0000 e5dc     if_bge.ko
> > %  3    1 0xc08ff000 4ce4     ums.ko
> > %  4    1 0xc0904000 b180     umass.ko
> > %  5    2 0xc382e000 25000    linux.ko
> > %  6    1 0xc38cb000 2000     rtc.ko
> > % 11    1 0xc3acf000 e000     if_iwi.ko
> > % 12    1 0xc3add000 3000     firmware.ko
> > 
> > Any clue how to disable this unwanted behaviour ?
> 
> No idea, but the same behavior can be seen with ipw(4) and experimental
> wpi(4). I seem to recall this didn't happen before the the support for
> firmware(9) was added.

It also happens with em(4) to me. I found out it doesn't happen when
devd is not running. I find it rather strange that the 'pciconf -l'
command shows driver name (e.g. em0@pci...) even after (successfully and
permanently) unloading the module for a device. The 'devinfo' command
does not.

Michal