Hello,

I posted the following bug to linux-usb-devel, and I did not receive 
any reply.

As the problem still occurs with 2.6.9-rc4-mm1 
(optimize-profile-path-slightly.patch reverted), I decided to post 
it again.

I cc Greg KH because he provides a fix for pci_register_driver and 
this oops is (indirectly) triggered by pci_unregister_driver (maybe 
these two things are related, just a guess...).

regards
~~
laurent

-------- Original Message --------
Subject: 2.6.9-rc3-mm2 : oops when rmmod uhci_hcd
Date: Wed, 06 Oct 2004 23:30:16 +0200
From: Laurent Riffard <laurent.riffard@free.fr>
To: linux-usb-devel@lists.sourceforge.net

Hello

I've got a oops when I rmmod uhci_hcd module :

Unable to handle kernel paging request at virtual address 6b6b6b6b
    printing eip:
c0186959
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
Modules linked in: ne2k_pci 8390 crc32 ohci1394 ieee1394
nls_iso8859_1 nls_cp850
    vfat fat reiser4 reiserfs via_agp agpgart dm_mod joydev uhci_hcd
usbcore rtc
CPU:    0
EIP:    0060:[<c0186959>]    Not tainted VLI
EFLAGS: 00010246   (2.6.9-rc3-mm2)
EIP is at remove_proc_entry+0x29/0x140
eax: 00000000   ebx: 6b6b6b6b   ecx: ffffffff   edx: cffa0770
esi: c037ab40   edi: 6b6b6b6b   ebp: cc0a7ea0   esp: cc0a7e7c
ds: 007b   es: 007b   ss: 0068
Process rmmod (pid: 1514, threadinfo=cc0a6000 task=cfbd8680)
Stack: c1301938 cc0a7e90 c022b9ed c034fa14 cffa0770 6b6b6b6b f58c7d8
c037ab40
          c13e593c cc0a7ec8 c013813e 00000286 00000003 cc0a6000
0000212 00000005
          c13e593c c13018f4 c1301938 cc0a7eec d083d3ff d084286a
0821af4 c1301990
Call Trace:
    [<c0105dd6>] show_stack+0xa6/0xb0
    [<c0105f4d>] show_registers+0x14d/0x1c0
    [<c0106134>] die+0xe4/0x170
    [<c0115822>] do_page_fault+0x4c2/0x5f7
    [<c01059a9>] error_code+0x2d/0x38
    [<c013813e>] free_irq+0x8e/0xf0
    [<d083d3ff>] usb_hcd_pci_remove+0xaf/0x180 [usbcore]
    [<c01c27b6>] pci_device_remove+0x66/0x70
    [<c022cbf7>] device_release_driver+0x57/0x60
    [<c022cc19>] driver_detach+0x19/0x30
    [<c022d0bc>] bus_remove_driver+0x5c/0xa0
    [<c022d5a7>] driver_unregister+0x17/0x40
    [<c01c29ae>] pci_unregister_driver+0xe/0x20
    [<d08219e0>] uhci_hcd_cleanup+0x10/0x56 [uhci_hcd]
    [<c0132b17>] sys_delete_module+0x177/0x1a0
    [<c0104f4d>] sysenter_past_esp+0x52/0x71
Code: 00 00 55 89 e5 83 ec 24 85 d2 89 5d f4 89 75 f8 89 7d fc 89 55
ec 89 45 f0
    0f 84 96 00 00 00 8b 5d f0 31 c0 b9 ff ff ff ff 89 df <f2> ae f7
d1 49 8b 42 34
    8d 7a 34 89 ce 85 c0 74 6e 8b 0f 89 da


I'm running kernel 2.6.9-rc3-mm2 with patches :
- pci_register_driver fix from greg KH
http://marc.theaimsgroup.com/?l=linux-kernel&m=109692915116202
- compilation fix for arch/i386/kernel/irq.c
http://marc.theaimsgroup.com/?l=linux-kernel&m=109688635818749
- preempt fix from Andrew Morton
http://marc.theaimsgroup.com/?l=linux-kernel&m=109692695515504

Attached below :
- full dmesg
- ksymoops output

For "lspci -v" output and .config, please see
http://marc.theaimsgroup.com/?l=linux-kernel&m=109680811022527&q=p7 and
http://marc.theaimsgroup.com/?l=linux-kernel&m=109680811022527&q=p8

regards
-- 
laurent