usb.ko is unloadable?

[Josef Karthauser]

On Sat, Jul 12, 2003 at 08:50:43PM +0400, Dmitry Morozovsky wrote:
> Dear colleagues,
> 
> I'm planning to debug usb connection with my new SONY CLIE handheld, and found
> that this process is much complicated by the fact usb.ko module can not be
> unloaded 'cause some process is referencing it:
> 
> marck at revamp:~/tmp> kldstat -v -i 11
> Id Refs Address    Size     Name
> 11    1 0xc0cf7000 1b000    usb.ko
>         Contains modules:
>                 Id Name
>                 62 usb/uhub
>                 63 uhub/uhub
>                 64 ohci/usb
>                 65 uhci/usb
>                 66 pci/uhci
>                 67 pci/ohci
> 
> (usbd has been killed, surely)
> 
> marck at revamp:~/tmp> dmesg | grep -i usb
> pci0: <Intel 82371AB/EB (PIIX4) USB controller> (vendor=0x8086, dev=0x7112) at 7.2 irq 11
> uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xe000-0xe01f irq 11 at device 7.2 on pci0
> usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
> usb0: USB revision 1.0
> 
> Who is referencing usb.ko?
> 
> I'm on 4.8-R/4.8-STABLE.
> 
> Thanks in advance, and have a nice weekend.

The usb module won't unload intentionally because we're not convinced
that it correctly give back all allocated memory.  Take a look at the
unload code in the driver source for confirmation.

Joe
-- 
Josef Karthauser (joe at tao.org.uk)	       http://www.josef-k.net/
FreeBSD (cvs meister, admin and hacker)     http://www.uk.FreeBSD.org/
Physics Particle Theory (student)   http://www.pact.cpes.sussex.ac.uk/
================ An eclectic mix of fact and theory. =================
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