Re: 88SE9172 additional PCI ID: 1b4b:9172

[Robert Hancock <hancockrwd@gmail.com>]

On 05/28/2013 01:12 AM, George Spelvin wrote:
>> I don't think it's a typo.
>
> Indeed, pci.ids has three entries.
>
>> And we'll need a separate entry
>>
>>> (If I enable VT-d and the IOMMU, the devices are recognized but not the
>>> disks plugged into them, but I'm still working on figuring that out.)
>>
>> when the device gets working.
>
> I don't quite understand this.  With VT-d disabled in the BIOS,
> the devices *are* working.  I even have a port multiplier plugged
> into one.  (Which gets all confused by hdparm -m16, but whatever.)
>
> When I get time, I'm going to play with various BIOS and kernel
> options to narrow down the problem.  But that's for later.
>
> Can you explain what you think is not working now?

There are some known problems with some Marvell controllers and VT-d, 
apparently they issue PCIe requests containing the wrong device function 
causing IOMMU faults to occur. I believe a PCI quirk to work around the 
problem was either being worked on or finished - if it's in already, it 
might need this device ID added to it as well.