Date: Tue, 29 Jul 2003 00:54:56 -0700
From: Andrew Morton <akpm@osdl.org>
To: "S. Anderson" <sa@xmission.com>
Cc: sa@xmission.com, pavel@xal.co.uk, linux-kernel@vger.kernel.org,
       adaplas@pol.net
Subject: Re: OOPS 2.6.0-test2, modprobe i810fb
Message-Id: <20030729005456.495c89c4.akpm@osdl.org>
In-Reply-To: <20030729012417.A18449@xmission.xmission.com>
References: <20030728171806.GA1860@xal.co.uk>
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	<20030728202600.18338fa9.akpm@osdl.org>
	<20030728231812.A20738@xmission.xmission.com>
	<20030728225914.4f299586.akpm@osdl.org>
	<20030729012417.A18449@xmission.xmission.com>
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"S. Anderson" <sa@xmission.com> wrote:
>
> Jul 29 00:33:48 localhost kernel: pci_bus_match: bus=0, devfn=232 8086 2482
>  Jul 29 00:33:48 localhost kernel:  ^ matching? ^ (i810fb)  ((( &ids->vendor = d094ee7c )))
>  Jul 29 00:33:48 localhost kernel: pci_match_device: &ids->vendor = d094ee7c
>  [..snip..]
> 
>  then when i insert my card again this is when the oops occurs:
> 
>  Jul 29 00:40:12 localhost kernel:  (pci_bus_add_devices) bus 3 devfn 0  1260 3890
>  Jul 29 00:40:12 localhost kernel: pci_bus_match: bus=3, devfn=0 1260 3890
>  Jul 29 00:40:12 localhost kernel:  ^ matching? ^ (serial)  ((( &ids->vendor = c0397314 )))
>  Jul 29 00:40:12 localhost kernel: pci_match_device: &ids->vendor = c0397314
>  Jul 29 00:40:12 localhost kernel: pci_bus_match: bus=3, devfn=0 1260 3890
>  Jul 29 00:40:12 localhost kernel:  ^ matching? ^ (eepro100)  ((( &ids->vendor = c0398a60 )))
>  Jul 29 00:40:12 localhost kernel: pci_match_device: &ids->vendor = c0398a60
>  Jul 29 00:40:12 localhost kernel: pci_bus_match: bus=3, devfn=0 1260 3890
>  Jul 29 00:40:12 localhost kernel:  ^ matching? ^ (PCI IDE)  ((( &ids->vendor = c039a630 )))
>  Jul 29 00:40:12 localhost kernel: pci_match_device: &ids->vendor = c039a630
>  Jul 29 00:40:12 localhost kernel: pci_bus_match: bus=3, devfn=0 1260 3890
>  Jul 29 00:40:12 localhost kernel:  ^ matching? ^ (yenta_cardbus)  ((( &ids->vendor = c039df98 )))
>  Jul 29 00:40:12 localhost kernel: pci_match_device: &ids->vendor = c039df98
>  Jul 29 00:40:12 localhost pci.agent: ... no modules for PCI slot 0000:03:00.0
>  Jul 29 00:40:12 localhost kernel: pci_bus_match: bus=3, devfn=0 1260 3890
>  Jul 29 00:40:12 localhost kernel:  ^ matching? ^ (i810fb)  ((( &ids->vendor = d094ee7c )))
>  Jul 29 00:40:12 localhost kernel: pci_match_device: &ids->vendor = d094ee7c
>  Jul 29 00:40:12 localhost kernel: Unable to handle kernel paging request at virtual address d094ee7c

wtf?  So the memory at d094ee7c (which contains i810fb's pci table) became
unmapped from kernel virtual address space as a result of you inserting
your carbus card.

I am impressed.

Jsut as a crazy test, could you delete /sbin/rmmod and see if it still
happens?  Maybe something is removing the module at an embarrassing time or
something.

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