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Date: Sat, 31 Dec 2005 15:32:29 +0100
From: Adrian Bunk <bunk@stusta.de>
To: Diego Calleja <diegocg@gmail.com>
Cc: luca.risolia@studio.unibo.it, linux-kernel@vger.kernel.org,
       linux-usb-devel@lists.sourceforge.net, gregkh@suse.de
Subject: Re: Oops with w9968cf
Message-ID: <20051231143229.GI3811@stusta.de>
References: <20051212151820.5656ddd8.diegocg@gmail.com>
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On Mon, Dec 12, 2005 at 03:18:20PM +0100, Diego Calleja wrote:

> While playing with the webcam support in kde 3.5 (kopete), creative 
> webcam go plus.... (2.6.15-rc5)
> 
> Unable to handle kernel NULL pointer dereference at virtual address 0000000c
>  printing eip:
> c019b162
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT SMP
> Modules linked in: ovcamchip w9968cf videodev i2c_core ipt_REJECT radeon drm thermal fan button processor ac battery ipt_MASQUERADE iptable_nat ip_nat ip_conntrack iptable_filter ip_tables usbhid snd_ca0106 snd_rawmidi snd_seq_device snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm parport_pc floppy snd_timer parport ohci_hcd snd pcspkr usbcore e100 soundcore snd_ac97_bus snd_page_alloc
> CPU:    0
> EIP:    0060:[<c019b162>]    Not tainted VLI
> EFLAGS: 00010246   (2.6.15-rc5)
> EIP is at sysfs_hash_and_remove+0x22/0xef
> eax: f4789bc8   ebx: f76338a8   ecx: c19b2d40   edx: c533de44
> esi: 00000000   edi: f6a79600   ebp: f8962f40   esp: ec721f04
> ds: 007b   es: 007b   ss: 0068
> Process kopete (pid: 21843, threadinfo=ec721000 task=c91bfab0)
> Stack: f6a79600 f4789bc8 e9ce0788 f76338a8 f76338a0 f6a79600 f8962f40 c022e426
>        00000000 f8962fbc f76338a0 f8870f00 f7094830 f387ed08 c022e488 f4bc0000
>        f89617c2 ec721f54 f89c1deb f89c8abc f8870f00 f4bc00bc 00000000 f4bc0000
> Call Trace:
>  [<c022e426>] class_device_del+0xa6/0x100
>  [<c022e488>] class_device_unregister+0x8/0x10
>  [<f89617c2>] video_unregister_device+0x32/0x4d [videodev]
>  [<f89c1deb>] w9968cf_release_resources+0x3b/0xf0 [w9968cf]
>  [<f89c24d0>] w9968cf_release+0x40/0x100 [w9968cf]
>  [<c0163a01>] __fput+0x91/0x180
>  [<c0162097>] filp_close+0x47/0x90
>  [<c0103061>] syscall_call+0x7/0xb
> Code: 26 00 8d bc 27 00 00 00 00 55 57 56 53 83 ec 0c 89 44 24 04 89 14 24 8b 50 10 8b 70 58 85 d2 74 73 f0 ff 4a 78 0f 88 cd 00 00 00 <8b> 46 0c 8d 68 fc 8b 4d 04 0f 18 01 90 83 c6 0c 89 c3 39 f0 89
>  <6>usb 1-1: OV7620 image sensor initialized
> usb 1-1: USB disconnect, address 5
> usb 1-1: Disconnecting Creative Labs Video Blaster WebCam Go Plus...

Hi Diego,

thanks for your report.

Is this issue still present in kernel 2.6.15-rc7?
Which was the last working kernel?

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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