Re: libata: 2.6.7-bk6,12 hang with ata_piix in combined mode; -bk5ok

[Len Brown]

On Tue, 2004-06-29 at 21:20, Jeff Garzik wrote:
> On Tue, Jun 29, 2004 at 08:54:20PM -0400, Bill Rugolsky Jr. wrote:
> > ata_piix: combined mode detected
> > ACPI: PCI interrupt 0000:1f.2[A]: no GSI
> [...]
> >  sda:<3>ata1: command 0x25 timeout, stat 0xd0 host_stat 0x64
> 
> 
> I wonder what "no GSI" is.

It means that the ACPI PCI Routing Table (_PRT)
did not have an entry for this PCI device.

This is very common for IDE, which
can't decide if it is a real PCI device
or a legacy device; and the driver
is hard-coded to IRQ14, 15 anyway.

Linux is actually sort of exposed
WRT motherboard devices, because
while Linux/ACPI finds the PCI
resources, it doesn't look for
the legacy resource, which
is where on this board IDE lives.

-Len



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