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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-05-02 15:13:39 -0700
committerJeff Garzik <jgarzik@redhat.com>2008-05-06 11:43:44 -0400
commit05177f178efe1459d2d0ac05430027ba201889a4 (patch)
tree5102edb75980d79c352965f451ee91b8410ac4e5 /drivers/ata
parent22bfc6d5e19b72d50535ce32fd6dee2ce2e75775 (diff)
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>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ata_generic.c6
-rw-r--r--drivers/ata/pata_acpi.c6
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 47aeccd52fa9..75a406f5e694 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -152,6 +152,12 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
if (dev->vendor == PCI_VENDOR_ID_AL)
ata_pci_bmdma_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_sff_init_one(dev, ppi, &generic_sht, NULL);
}
diff --git a/drivers/ata/pata_acpi.c b/drivers/ata/pata_acpi.c
index c5f91e629945..fbe605711554 100644
--- a/drivers/ata/pata_acpi.c
+++ b/drivers/ata/pata_acpi.c
@@ -259,6 +259,12 @@ static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
.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_sff_init_one(pdev, ppi, &pacpi_sht, NULL);
}