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    Subject[patch 09/29] pata_atiixp: Dont disable
    2.6.25-stable review patch.  If anyone has any objections, please let us 
    know.

    ------------------
    From: Alan Cox <alan@lxorguk.ukuu.org.uk>

    Commit 05177f178efe1459d2d0ac05430027ba201889a4 upstream

    pata_atiixp: Don't disable

    A couple of distributions (Fedora, Ubuntu) were having weird problems with the
    ATI IXP series PATA controllers being reported as simplex. At the heart of
    the problem is that both distros ignored the recommendations to load pata_acpi
    and ata_generic *AFTER* specific host drivers.

    The underlying cause however is that if you D3 and then D0 an ATI IXP it
    helpfully throws away some configuration and won't let you rewrite it.

    Add checks to ata_generic and pata_acpi to pin ATIIXP devices. Possibly the
    real answer here is to quirk them and pin them, but right now we can't do that
    before they've been pcim_enable()'d by a driver.

    I'm indebted to David Gero for this. His bug report not only reported the
    problem but identified the cause correctly and he had tested the right values
    to prove what was going on

    [If you backport this for 2.6.24 you will need to pull in the 2.6.25
    removal of the bogus WARN_ON() in pcim_enagle]

    Signed-off-by: Alan Cox <alan@redhat.com>
    Tested-by: David Gero <davidg@havidave.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

    ---
    drivers/ata/ata_generic.c | 6 ++++++
    drivers/ata/pata_acpi.c | 6 ++++++
    2 files changed, 12 insertions(+)

    --- a/drivers/ata/ata_generic.c
    +++ b/drivers/ata/ata_generic.c
    @@ -193,6 +193,12 @@ static int ata_generic_init_one(struct p
    if (dev->vendor == PCI_VENDOR_ID_AL)
    ata_pci_clear_simplex(dev);

    + if (dev->vendor == PCI_VENDOR_ID_ATI) {
    + int rc = pcim_enable_device(dev);
    + if (rc < 0)
    + return rc;
    + pcim_pin_device(dev);
    + }
    return ata_pci_init_one(dev, ppi);
    }

    --- a/drivers/ata/pata_acpi.c
    +++ b/drivers/ata/pata_acpi.c
    @@ -314,6 +314,12 @@ static int pacpi_init_one (struct pci_de
    .port_ops = &pacpi_ops,
    };
    const struct ata_port_info *ppi[] = { &info, NULL };
    + if (pdev->vendor == PCI_VENDOR_ID_ATI) {
    + int rc = pcim_enable_device(pdev);
    + if (rc < 0)
    + return rc;
    + pcim_pin_device(pdev);
    + }
    return ata_pci_init_one(pdev, ppi);
    }

    --


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