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Date: Wed, 16 Jul 2008 21:30:37 +0200
From: "MadLoisae@gmx.net" <MadLoisae@gmx.net>
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To: linux-kernel@vger.kernel.org
CC: Alexey Dobriyan <adobriyan@gmail.com>, santiago@crfreenet.org
Subject: RE: Re: kernel oops with framebuffer device vt8623fb
References: <487E2911.5090701@gmx.net> <20080716171321.GA5146@martell.zuzino.mipt.ru>
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Hi Alexey,

thanks, now my machine boots, the VT8623 is now recognized correctly on 
bootup.

will this issue be reverted or corrected with a 2.6.26.1?

thanks!

kind regards, Alois


Alexey Dobriyan wrote:
> On Wed, Jul 16, 2008 at 07:00:02PM +0200, MadLoisae@gmx.net wrote:
>   
>> I've updated my machine from 2.6.25.11 to 2.6.26 and I think I've found a 
>> problem.
>>
>> If I load the module vt8623fb i get a kernel oops, if the VIA 8623 display 
>> framebuffer driver is compiled direct into kernel the system hangs up very 
>> early at booting the kernel.
>>     
>
> Of course, info->dev is NULL, info was just kzallocated!
>
> Do
> 	git-revert 20e061fb750d36ec0ffcb2e44ed7dafa9018223b
>
> rebuild, reboot to confirm.
>
>   
>> BUG: unable to handle kernel NULL pointer dereference at 000000b8
>> IP: [<c02a39c0>] dev_driver_string+0x0/0x29
>> *pde = 00000000
>> Oops: 0000 [#1]
>> Modules linked in: vt8623fb(+) svgalib vgastate budget_av saa7146_vv 
>> videobuf_dma_sg videobuf_core budget_core saa7146 ttpci_eeprom tda10021 
>> tda10023 tda1004x
>>
>> Pid: 3657, comm: modprobe Not tainted (2.6.26 #5)
>> EIP: 0060:[<c02a39c0>] EFLAGS: 00010286 CPU: 0
>> EIP is at dev_driver_string+0x0/0x29
>> EAX: 00000000 EBX: f8e57e00 ECX: 00000010 EDX: 00000004
>> ESI: 0000008c EDI: f5fe9c00 EBP: 00000000 ESP: ec041de0
>> DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
>> Process modprobe (pid: 3657, ti=ec040000 task=ec03d8d0 task.ti=ec040000)
>> Stack: f8e56408 f7d44000 c0185b44 f5fe9e34 00000010 04d440b4 000719d4 
>> f8e57e90
>>       f8e57e60 f7d44000 c02a5daa c0250f4a f7d4404c 00000000 f8e57e90 
>> c02a5d34
>>       f7d4404c f7d440f4 f8e57e90 c02a5de1 00000000 f8e57e90 f8e57e90 
>> c02a560d
>> Call Trace:
>> [<f8e56408>] vt8623_pci_probe+0x283/0x45b [vt8623fb]
>> [<c0185b44>] sysfs_create_link+0x85/0xc5
>> [<c02a5daa>] __driver_attach+0x0/0x55
>> [<c0250f4a>] pci_device_probe+0x36/0x57
>> [<c02a5d34>] driver_probe_device+0xb4/0x12a
>> [<c02a5de1>] __driver_attach+0x37/0x55
>> [<c02a560d>] bus_for_each_dev+0x34/0x56
>> [<c02a5bd0>] driver_attach+0x11/0x13
>> [<c02a5daa>] __driver_attach+0x0/0x55
>> [<c02a5963>] bus_add_driver+0x8a/0x1a7
>> [<c02419f0>] kset_find_obj+0x18/0x40
>> [<c02a5f39>] driver_register+0x6d/0xc1
>> [<c02510e0>] __pci_register_driver+0x2b/0x57
>> [<c012f73f>] sys_init_module+0x14cd/0x161e
>> [<c0110b49>] do_page_fault+0x228/0x537
>> [<c024265d>] prio_tree_insert+0x1b/0x1dd
>> [<f8e4a021>] svga_tilecopy+0x0/0x100 [svgalib]
>> [<c01035c1>] sysenter_past_esp+0x6a/0x99
>> =======================
>> Code: 5a 85 c0 59 79 20 68 24 d7 5d c0 b9 1b 87 4a c0 31 d2 b8 e8 0e 4e c0 
>> 53 e8 09 47 e7 ff 5a 59 eb 05 b8 ed ff ff ff 5b c3 90 90 90 <8b> 90 b8 00 
>> 00 00 85 d2 75 0a 8b 90 b4 00 00 00 85 d2 74 03 8b
>> EIP: [<c02a39c0>] dev_driver_string+0x0/0x29 SS:ESP 0068:ec041de0
>>     
>
>
>   

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