[BUG] linux-2.6.12_rc4: Oops: Kernel access of bad area, sig: 11 [#1]

[Benjamin Herrenschmidt]

On Sat, 2005-05-07 at 17:09 +0000, Markus Rothe wrote:
> Hello,
> 
> I'm running Linux on my G5.
> 
> I just compiled linux-2.6.12_rc4 and got this when loading my sound
> modules at boot time (linux-2.6.12_rc3 worked just fine):

Hrm... weird. I'll have a look on monday. It looks like something is
blowing up in the i2c layer...

Ben.

> ---- SNIP ----
> Oops: Kernel access of bad area, sig: 11 [#1]
> SMP NR_CPUS=2 POWERMAC 
> Modules linked in: snd_powermac snd_pcm snd_page_alloc snd_timer snd
> soundcore
> NIP: C0000000002E4030 XER: 20000000 LR: D0000000001B4AC8 CTR:
> C0000000002E4004
> REGS: c000000237783890 TRAP: 0300   Not tainted  (2.6.12-rc4)
> MSR: 9000000000009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 CR: 22022484
> DAR: 0000000000000002 DSISR: 0000000040000000
> TASK: c0000002375ba030[7007] 'modprobe' THREAD: c000000237780000 CPU: 0
> GPR00: D0000000001B4AC8 C000000237783B10 C0000000005A5E70 0000000000000000 
> GPR04: 0000000000000001 0000000000000060 0000000000000000 0000000000000001 
> GPR08: 0000000000000002 0000000000000000 C00000000047AAC0 C0000000002E4004 
> GPR12: D0000000001B9C58 C00000000047B800 0000000000000000 0000000000000000 
> GPR16: 0000000000000000 0000000010028790 0000000000000000 000000001002A4A0 
> GPR20: 0000000000000000 0000000000000000 0000000000000000 00000080001B1010 
> GPR24: 000000001002AA90 000000001002ABF8 000000001002ABE0 C000000000478958 
> GPR28: C00000000F70D580 000000000000000A D0000000001CACD8 D0000000001C137C 
> NIP [c0000000002e4030] .i2c_smbus_write_byte_data+0x2c/0x50
> LR [d0000000001b4ac8] .send_init_client+0x50/0x110 [snd_powermac]
> Call Trace:
> [c000000237783b10] [d0000000001c2030]
> tumbler_mixers+0x0/0xffffffffffff8b28 [snd_powermac] (unreliable)
> [c000000237783bc0] [d0000000001b4ac8] .send_init_client+0x50/0x110
> [snd_powermac]
> [c000000237783c60] [d0000000001b9514]
> .snd_pmac_tumbler_post_init+0x3c/0x94 [snd_powermac]
> [c000000237783ce0] [d0000000001b74fc] .alsa_card_pmac_init+0x174/0x3cc
> [snd_powermac]
> [c000000237783d90] [c000000000063988] .sys_init_module+0x2cc/0x4a8
> [c000000237783e30] [c00000000000d980] syscall_exit+0x0/0x18
> Instruction dump:
> 4e800020 7c0802a6 7c691b78 7c872378 38c00000 39000002 f8010010 f821ff51 
> 98a10070 60000000 60000000 60000000 <a0a30002> a0890006 e8630008 39210070 
>  <6>usbcore: registered new driver snd-usb-audio
> ---- SNIP ----
> 
> Could someone please take a look at that?
> 
> Best regards,
> 
> Markus
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-- 
Benjamin Herrenschmidt <benh at kernel.crashing.org>