summaryrefslogtreecommitdiffstats
path: root/drivers/ata/ata_piix.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ata/ata_piix.c')
-rw-r--r--drivers/ata/ata_piix.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 887d8f46a287..ef8b30d577bd 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1289,6 +1289,39 @@ static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
return map;
}
+static bool piix_no_sidpr(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+
+ /*
+ * Samsung DB-P70 only has three ATA ports exposed and
+ * curiously the unconnected first port reports link online
+ * while not responding to SRST protocol causing excessive
+ * detection delay.
+ *
+ * Unfortunately, the system doesn't carry enough DMI
+ * information to identify the machine but does have subsystem
+ * vendor and device set. As it's unclear whether the
+ * subsystem vendor/device is used only for this specific
+ * board, the port can't be disabled solely with the
+ * information; however, turning off SIDPR access works around
+ * the problem. Turn it off.
+ *
+ * This problem is reported in bnc#441240.
+ *
+ * https://bugzilla.novell.com/show_bug.cgi?id=441420
+ */
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
+ pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
+ pdev->subsystem_device == 0xb049) {
+ dev_printk(KERN_WARNING, host->dev,
+ "Samsung DB-P70 detected, disabling SIDPR\n");
+ return true;
+ }
+
+ return false;
+}
+
static int __devinit piix_init_sidpr(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
@@ -1302,6 +1335,10 @@ static int __devinit piix_init_sidpr(struct ata_host *host)
if (hpriv->map[i] == IDE)
return 0;
+ /* is it blacklisted? */
+ if (piix_no_sidpr(host))
+ return 0;
+
if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
return 0;
@@ -1387,6 +1424,32 @@ static void piix_iocfg_bit18_quirk(struct ata_host *host)
}
}
+static bool piix_broken_system_poweroff(struct pci_dev *pdev)
+{
+ static const struct dmi_system_id broken_systems[] = {
+ {
+ .ident = "HP Compaq 2510p",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
+ },
+ /* PCI slot number of the controller */
+ .driver_data = (void *)0x1FUL,
+ },
+
+ { } /* terminate list */
+ };
+ const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
+
+ if (dmi) {
+ unsigned long slot = (unsigned long)dmi->driver_data;
+ /* apply the quirk only to on-board controllers */
+ return slot == PCI_SLOT(pdev->devfn);
+ }
+
+ return false;
+}
+
/**
* piix_init_one - Register PIIX ATA PCI device with kernel services
* @pdev: PCI device to register
@@ -1422,6 +1485,14 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
if (!in_module_init)
return -ENODEV;
+ if (piix_broken_system_poweroff(pdev)) {
+ piix_port_info[ent->driver_data].flags |=
+ ATA_FLAG_NO_POWEROFF_SPINDOWN |
+ ATA_FLAG_NO_HIBERNATE_SPINDOWN;
+ dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
+ "on poweroff and hibernation\n");
+ }
+
port_info[0] = piix_port_info[ent->driver_data];
port_info[1] = piix_port_info[ent->driver_data];