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Date: Wed, 19 Sep 2007 10:36:14 +0100
From: Andy Whitcroft <apw@shadowen.org>
To: Andrew Morton <akpm@linux-foundation.org>
Subject: 2.6.23-rc6-mm1 -- powerpc pSeries_log_error panic in
	rtas_call/early_enable_eeh
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Seeing the following panic booting an old powerpc LPAR:

Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc000000000047b48
cpu 0x0: Vector: 300 (Data Access) at [c0000000006a3750]
    pc: c000000000047b48: .pSeries_log_error+0x364/0x420
    lr: c000000000047acc: .pSeries_log_error+0x2e8/0x420
    sp: c0000000006a39d0
   msr: 8000000000001032
   dar: 0
 dsisr: 42000000
  current = 0xc0000000005acab0
  paca    = 0xc0000000005ad700
    pid   = 0, comm = swapper
enter ? for help
[c0000000006a3af0] c000000000021164 .rtas_call+0x200/0x250
[c0000000006a3ba0] c000000000049d50 .early_enable_eeh+0x168/0x360
[c0000000006a3c70] c00000000002f674 .traverse_pci_devices+0x8c/0x138
[c0000000006a3d10] c000000000560ce8 .eeh_init+0x1a8/0x200
[c0000000006a3db0] c00000000055fb70 .pSeries_setup_arch+0x128/0x234
[c0000000006a3e40] c00000000054f830 .setup_arch+0x214/0x24c
[c0000000006a3ee0] c000000000546a38 .start_kernel+0xd4/0x3e4
[c0000000006a3f90] c00000000045adc4 .start_here_common+0x54/0x58
0:mon>

This machine is:

# cat /proc/cpuinfo
processor       : 0
cpu             : POWER4+ (gq)
clock           : 1703.965296MHz
revision        : 19.0

[...]
machine         : CHRP IBM,7040-681

-apw