[Bug 11045] Bug in MPT Fusion 2.6.26-rc7 unbootable

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http://bugzilla.kernel.org/show_bug.cgi?id=11045





------- Comment #7 from bjorn.helgaas@hp.com  2008-07-08 09:52 -------
On Tuesday 08 July 2008 08:08:46 am James Bottomley wrote:
> That said, this line:
> 
> mptbase: ioc0: ERROR - Doorbell ACK timeout (count=4999), IntStatus=80000009!
> 
> is absolutely characteristic of a lost interrupt.
> 
> With the current LSI driver, we have two possible causes for this.  One
> is the usual ACPI screw up that we never seem to be able to fix.

Which ACPI screw up is that?  And what's the usual recipe?

I know about the ancient "pci=routeirq" recipe, but as far as I know,
there are no current problems that require that.

> The 
> other is that the driver recently enabled MSI (commit
> 23a274c8a5adafc74a66f16988776fc7dd6f6e51 in v2.6.26-rc1).  For the
> former, just follow the usual ACPI screw up recipe.  For the latter, you
> should see this message in the boot up:
> 
> mptbase: ioc0: PCI-MSI enabled
> 
> MSI can be turned off again by using the module parameter
> mpt_msi_enable=0.
> 
> Unfortunately, the true fix is to find out if the motherboard really has
> a global MSI problem (and I know MSI works with the LSI because I have a
> 1030 in an ia64 system here working just fine) and add it to the PCI
> quirks file as unable to use MSI.
> 
> James


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