Re: [git patches] libata updates for 3.3

[Linus Torvalds]

On Mon, Jan 16, 2012 at 3:54 PM, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:
>> Part of the problem with force-enable is that the MMIO BAR may need a
>> value, and not have it.  That, and an expectations mismatch between BIOS
>
> That's fine - we can happily assign one at boot time.

Actually, I think the reason that Matthews patch doesn't work for me
is that on my device, BAR #5 really is a _port_ BAR.

I didn't play with it much - busy merging and looking at various other
issues - but I'm starting to wonder whether maybe that 8086:1c01 chip
doesn't support AHCI at all. Or maybe it does something differently.

Other reports of this have BAR#5 either clear, or an MMIO BAR.   That

   Region 5: I/O ports at ffe0 [size=16]

looks really odd. Matthew's patch uses

  pci_assign_resource(pdev, 5);

but if it is a PIO region, that won't help anything..

That may be why it oopses for me - the AHCI driver is trying to use a
PIO address as an MMIO one with readl().

                   Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/