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Date:	Fri, 5 Oct 2007 09:28:44 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	linux-kernel@...r.kernel.org, i2c@...sensors.org,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [OOPS] AXIS 700 Lite (VIA C7 CPU) BUG with 2.6.23-rc9-git (i2c)

Hi Guennadi,

On Fri, 5 Oct 2007 00:46:59 +0200 (CEST), Guennadi Liakhovetski wrote:
> Got an AXIS 700 Lite thin client with a C7 CPU and CN700 chipset in it, 
> compiled today's git snapshot, and it Oopses in i2c_viapro:
> 
> BUG: unable to handle kernel paging request at virtual address 016c0555
>  printing eip:
> c01a60ed
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT 
> Modules linked in: i2c_viapro i2c_dev i2c_core loop
> CPU:    0
> EIP:    0060:[<c01a60ed>]    Not tainted VLI
> EFLAGS: 00010282   (2.6.23-rc9-g804b3f9a #5)
> EIP is at sysfs_create_group+0x1d/0xe0
> eax: f889b828   ebx: 00000000   ecx: f7d764b0   edx: 016c0555
> esi: 016c0555   edi: 00000000   ebp: f7d71dc4   esp: f7d71da8
> ds: 007b   es: 007b   fs: 0000  gs: 0033  ss: 0068
> Process modprobe (pid: 1214, ti=f7d70000 task=c18f3560 task.ti=f7d70000)
> Stack: c03ceba0 f7d7647c f7d71dd8 c01a392b f7d764b0 00000000 f889f3a0 f7d71ddc 
>        c0248b38 f889b828 f889b7c0 00000000 00000000 f7d71df4 c0248c0c 00000000 
>        f889b7c0 00000000 f889b864 f7d71e20 c02491ee f889b828 c0367b56 f889b864 
> Call Trace:
>  [<c0104e7c>] show_trace_log_lvl+0x1c/0x40
>  [<c0104f5a>] show_stack_log_lvl+0x9a/0xc0
>  [<c01051bc>] show_registers+0x1dc/0x340
>  [<c01054b2>] die+0x102/0x210
>  [<c01183c6>] do_page_fault+0x266/0x600
>  [<c031102a>] error_code+0x6a/0x70
>  [<c0248b38>] device_add_groups+0x28/0x60
>  [<c0248c0c>] device_add_attrs+0x5c/0xb0
>  [<c02491ee>] device_add+0xfe/0x330
>  [<c0249432>] device_register+0x12/0x20
>  [<f889f53d>] i2c_register_adapter+0xbd/0x170 [i2c_core]
>  [<f889f66a>] i2c_add_adapter+0x7a/0x80 [i2c_core]
>  [<f889a605>] vt596_probe+0x145/0x370 [i2c_viapro]
>  [<c01ef7dd>] pci_call_probe+0xd/0x10
>  [<c01ef82f>] __pci_device_probe+0x4f/0x60
>  [<c01ef869>] pci_device_probe+0x29/0x50
>  [<c024b864>] really_probe+0x94/0x140
>  [<c024b970>] driver_probe_device+0x40/0x60
>  [<c024baaa>] __driver_attach+0x7a/0x80
>  [<c024aa74>] bus_for_each_dev+0x54/0x70
>  [<c024bac9>] driver_attach+0x19/0x20
>  [<c024b177>] bus_add_driver+0x77/0x130
>  [<c024bed5>] driver_register+0x75/0x80
>  [<c01efb7a>] __pci_register_driver+0x4a/0x80
>  [<f8890017>] i2c_vt596_init+0x17/0x19 [i2c_viapro]
>  [<c01420a2>] sys_init_module+0xe2/0x140
>  [<c0104162>] sysenter_past_esp+0x5f/0x85
>  =======================
> Code: e8 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 56 89 d6 53 83 ec 
> 14 85 c0 0f 84 b2 00 00 00 8b 48 30 85 c9 0f 84 a7 00 00 00 <8b> 12 85 d2 
> 0f 85 89 00 00 00 89 4d f4 8b 5d f4 85 db 74 0b 8b 
> EIP: [<c01a60ed>] sysfs_create_group+0x1d/0xe0 SS:ESP 0068:f7d71da8

Thanks for letting us know. From the stack trace above, the oops
happens in the driver core. Greg, did you touch something in this area
recently?

Guennadi, what is the latest kernel version (if any) where the oops did
not happen? Please attach your .config.

Please also provide the output of "lspci -nn".

-- 
Jean Delvare
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