[PATCH] libata:pata_atiixp: Don't use unconnected secondary port on SB600/SB700

[Darren Stevens <darren@stevens-zone.net>]

The SB600 and SB700 southbridge chips from ATI/AMD only have
connections for the primary IDE port. As these chips have unique
pci device ID's use these to mark the secondary port as 'dummy'

Signed-off-by: Darren Stevens <darren@stevens-zone.net>
---

diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 49d705c..588c473 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -278,6 +278,11 @@ static int atiixp_init_one(struct pci_dev *pdev, const
struct pci_device_id *id)
    };
    const struct ata_port_info *ppi[] = { &info, &info };
 
+   if((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE) ||
+       (pdev->device == PCI_DEVICE_ID_ATI_IXP700_IDE))
+       /* SB600/700 don't have secondary port wired */
+       ppi[1] = &ata_dummy_port_info;
+
    return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
                      ATA_HOST_PARALLEL_SCAN);
 }