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Date:	Sun, 10 Feb 2008 18:39:54 +0100 (CET)
From:	Krzysztof Oledzki <olel@....pl>
To:	Joe Maloy <Joe.Maloy@....com>, DL-MPTFusionLinux@....com,
	linux-scsi@...r.kernel.org
cc:	linux-kernel@...r.kernel.org, Eric.Moore@....com,
	Maximilian Wilhelm <max@...2324.org>
Subject: Re: Kernel Panic in MPT SAS on 2.6.24 (and 2.6.23.14, 2.6.23.9)
 (fwd)

Hello,

Eric Moore is on vacation, adding some CCs and TOs.

---------- Forwarded message ----------
Date: Sun, 10 Feb 2008 18:25:39 +0100 (CET)
From: Krzysztof Oledzki <olel@....pl>
To: Maximilian Wilhelm <max@...2324.org>
Cc: linux-kernel@...r.kernel.org, Eric.Moore@....com
Subject: Re: Kernel Panic in MPT SAS on 2.6.24 (and 2.6.23.14, 2.6.23.9)



On Sun, 10 Feb 2008, Maximilian Wilhelm wrote:

> Am Friday, den  8 February hub Maximilian Wilhelm folgendes in die Tasten:
> 
>> Just noticed that Eric's address was wrong, so resend with corrected Cc.
> 
>> Eric, my intial report was http://lkml.org/lkml/2008/2/6/300
>> 
>>> Am Thursday, den  7 February hub Krzysztof Oledzki folgendes in die Tasten:
>>> 
>>> Hi!
>>> 
>>>>> While installing my new firewall I got the following kernel panic in
>>>>> the MPT SAS driver which I need for the disks.
>>> 
>>>>> The first kernel I bootet was 2.6.23.14 which did panic so I tried a
>>>>> 2.6.24 which panics, too. Our usual FAI kernel (2.6.23.9) is also
>>>>> affected.
>>> 
>>>> Could you please try 2.6.22-stable?
>>> 
>>> Yes it works :-/
>>> 
>>> I've put some things which on the web which might be helpful:
>>> 
>>> dmesg		http://files.rfc2324.org/mptsas_panic/2.6.22-dmesg
>>> lspci -v	http://files.rfc2324.org/mptsas_panic/2.6.22-lspci-v
>>> .config		http://files.rfc2324.org/mptsas_panic/2.6.22-config
>>> 
>>> I'll search for the last working kernel and try to break it down to a
>>> commit tommorow when I can get a serial console or direct access.
>>> The Java driven console redirection is everything else than fulfilling :-(
>>> 
>>>> It looks *very* similar to my problem:
>>> 
>>>> http://bugzilla.kernel.org/show_bug.cgi?id=9909
>>> 
>>> It seems to be the same controller:
>>> 
>>> 01:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E 
>>> PCI-Express Fusion-MPT SAS (rev 08)
>>> 	Subsystem: Dell Unknown device 1f10
>>> 	Flags: bus master, fast devsel, latency 0, IRQ 16
>>> 	I/O ports at ec00 [size=256]
>>> 	Memory at fc8fc000 (64-bit, non-prefetchable) [size=16K]
>>> 	Memory at fc8e0000 (64-bit, non-prefetchable) [size=64K]
>>> 	Expansion ROM at fc900000 [disabled] [size=1M]
>>> 	Capabilities: [50] Power Management version 2
>>> 	Capabilities: [68] Express Endpoint IRQ 0
>>> 	Capabilities: [98] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
>>> Enable-
>>> 	Capabilities: [b0] MSI-X: Enable- Mask- TabSize=1
> 
> I did a git bisect between v2.6.22 v2.6.23 and it seems that
>  6cb8f91320d3e720351c21741da795fed580b21b
> introduced some badness.

Thanks! This was *really* useful!

Now, how about attached patch? Should work with both 2.6.23 and 2.6.24.

Best regards,

 				Krzysztof Olędzki
View attachment "scsi-mpt-fusion-dont-oops-if-NumPhys-0.patch" of type "TEXT/PLAIN" (729 bytes)

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