linux-kernel - Re: Crash on reading the whole PCI config of PIIX4 SMBus

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Date:	Wed, 23 Sep 2009 14:59:08 +0200
From:	Henrik Kretzschmar <henne@...htwindheim.de>
To:	Wolfram Sang <w.sang@...gutronix.de>
CC:	khali@...ux-fr.org, jbarnes@...tousgeek.org,
	linux-pci@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Crash on reading the whole PCI config of PIIX4 SMBus

Wolfram Sang schrieb:
> On Tue, Sep 22, 2009 at 05:46:10PM +0200, Henrik Kretzschmar wrote:
>
>   
>> at boot time my system (Wincor/Nixdorf Beetle D1) sometimes crashs while loading the i2c-piix4 driver.
>>     
>
> Have you checked if you have the latest BIOS for this machine? Sometimes
> PCI-problems got fixed there...
>
>   
Thanks for you fast replies,

the latest BIOS (05/08) is already installed, so no fixing can be expected that way


I tested my killer-commands at the other box @home with no crashes.

The commands _work_ with a coldstarted Linux and i2c-piix not loaded,
so the only thing I can do is blacklisting it and renounce sensors support,
having a good a argument for a new hardware aquisition. :)

For completness the message with the SMBus revision, which is not the pci-revision, is:

SMBus Host Controller at 0x1040, revision 0


The "?" at the interrupt line of lspci is a little strange:

>> Interrupt: pin ? routed to IRQ 9

looking at lspci -x -s 7.3 I can see that PCI_INTERRUPT_PIN == 0 

I cant see that i2p-piix does any interrupts, refering /proc/irq/9/spurious

The driver says:
 
Using Interrupt SMI# for SMBus

I'm not sure, but my box @home has the same lspci output with the "?".

So long, thanks for help.



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