linux-kernel - Re: [PATCH] prom_find_machine_type typo breaks pSeries lpar boot

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Message-ID: <473AE9BE.8070001@in.ibm.com>
Date:	Wed, 14 Nov 2007 17:57:42 +0530
From:	"B. N. Poornima" <poornima@...ibm.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Nathan Lynch <ntl@...ox.com>, Andrew Morton <akpm@...l.org>,
	Linus Torvalds <torvalds@...l.org>,
	ppc64 dev list <linuxppc64-dev@...abs.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Martin J. Bligh" <mbligh@...igh.org>, roland@...spin.com
Subject: Re: [PATCH] prom_find_machine_type typo breaks pSeries lpar boot

Benjamin Herrenschmidt wrote:
> On Fri, 2005-06-03 at 14:25 -0500, Nathan Lynch wrote:
>   
>> Typo in prom_find_machine_type from Ben's recent patch "ppc64: Fix
>> result code handling in prom_init" prevents pSeries LPAR systems from
>> booting.
>>
>> Tested on a pSeries 570 and OpenPower 720 (both Power5 LPAR).
>>     
>
> Damn ! I'm certain I tested it on P5 ! I must have forgotten to "quilt
> ref" before sending the patch (as I did notice this typo and fixed it
> just before sending).
>
> Sorry!
>
> Ben.
>
>
> -
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>
>   
Hello,
Same typo has creped in again from 2.6.17 kernel onwards and causing 
open firmware exception in pSeries systems.
=====================================================================================

Welcome to yaboot version 10.1.21-r910.SuSE
booted from '/vdevice/v-scsi@...00003/disk@...0000000000000'
Enter "help" to get some basic usage information
boot: 2.6.23.1
Please wait, loading kernel...
Allocated 03500000 bytes for kernel @ 01c00000
   Elf64 kernel loaded...
Loading ramdisk...
ramdisk loaded 0020d000 @ 06b00000
DEFAULT CATCH!, exception-handler=fff00300 
at   %SRR0: c00000000202705c   %SRR1: 8000000000003002 
Open Firmware exception handler entered from non-OF code

Client's Fix Pt Regs:
 00 0223100003080000 00000000018bfac0 0000000004bbeaf8 00000000018bfb48
 04 00000000018bfc90 0000000000c39a48 0000000000000000 5c3a03080000a0fa
 08 0000000000000001 0000000000000000 05910000194c0223 000000005cae0000
 0c 0000000003f1eaf8 0000000000000000 0000000000000000 0000000000000000
 10 0000000000000000 0000000000c39a48 0000000000000000 00000000018bfc90
 14 0000000000c00000 000000000020d000 0000000000000000 0000000008b00000
 18 0000000000280004 00000000018bff04 0000000000000001 0000000000000000
 1c 0000000008b00000 0000000000c39a48 c000000004d1e530 0000000008b00000
Special Regs:
    %IV: 00000300     %CR: 44000028    %XER: 00000000  %DSISR: 08000000 
  %SRR0: c00000000202705c   %SRR1: 8000000000003002 
    %LR: c000000002027428    %CTR: c0000000020273f0 
   %DAR: 05910000194c02eb 
Virtual PID = 0 
PFW: Unable to send error log!
 ofdbg
0 > 

===========================================================================================
The patch that is provided solves the problem.

Regards,
Poornima.

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