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From: Nerijus Baliunas on 19 Jul 2006 09:00
On Fri, 7 Jul 2006 19:19:23 +0200 Adam Helms <helms.adam(a)gmail.com> wrote:

> Makes the AHCI driver detect the PCI ID 8086:27c0 (IDE interface:
> Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial ATA Storage
> Controller IDE (rev 01)) as an AHCI chipset.
>
> 8086:27c0 also works with ata_piix but it's much slower. 8086:27c0 is
> shipped with - among others - new HP Proliant servers.

I have Intel d945psn motherboard with this controller. I patched
Fedora 2.6.17-1.2145 kernel with this patch, but I get when booting:

ahci 0000:00:1f.2: version 1.2
ACPI: PCI Interrupt 0000:00:1f:2[B] -> GSI 19 (level, low) -> IRQ 193
ahci: probe of 0000:00:1f.2 failed with error -12

Is it because it has IDE controller too?
dmesg:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ICH7: IDE controller at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 185
ICH7: chipset revision 1
ICH7: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0x40b0-0x40b7, BIOS settings: hda:DMA, hdb:pio
Probing IDE interface ide0...
hda: ST3120026A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hda: max request size: 512KiB

Regards,
Nerijus

> Signed-off-by: Adam Helms <helms.adam(a)gmail.com>
> ---------
>
> --- /usr/src/linux-source-2.6.15/drivers/scsi/ahci.c.orig
> 2006-07-07 19:07:14.000000000 +0200
> +++ /usr/src/linux-source-2.6.15/drivers/scsi/ahci.c 2006-07-07
> 19:07:31.000000000 +0200
> @@ -261,6 +261,8 @@ static const struct pci_device_id ahci_p
> board_ahci }, /* ICH6 */
> { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
> board_ahci }, /* ICH6M */
> + { PCI_VENDOR_ID_INTEL, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
> + board_ahci }, /* ICH7 */
> { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
> board_ahci }, /* ICH7 */
> { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,

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