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    Subject[PATCH] sky2: override for PCI legacy power management
    Some BIOS's don't setup power management correctly (what else is
    new) and don't allow use of PCI Express power control. Add a special
    exception module parameter to allow working around this issue.
    Based on slightly different patch by Knut Petersen.

    Reported-by: Arkadiusz Miskiewicz <arekm@maven.pl>
    Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
    ---
    Patch against -net (ie. 3.3.0)

    --- a/drivers/net/ethernet/marvell/sky2.c 2012-01-10 10:56:56.855156017 -0800
    +++ b/drivers/net/ethernet/marvell/sky2.c 2012-03-21 08:25:52.400929532 -0700
    @@ -95,6 +95,10 @@ static int disable_msi = 0;
    module_param(disable_msi, int, 0);
    MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");

    +static int legacy_pme = 0;
    +module_param(legacy_pme, int, 0);
    +MODULE_PARM_DESC(legacy_pme, "Legacy power management");
    +
    static DEFINE_PCI_DEVICE_TABLE(sky2_id_table) = {
    { PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9000) }, /* SK-9Sxx */
    { PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9E00) }, /* SK-9Exx */
    @@ -867,6 +871,13 @@ static void sky2_wol_init(struct sky2_po
    /* Disable PiG firmware */
    sky2_write16(hw, B0_CTST, Y2_HW_WOL_OFF);

    + /* Needed by some broken BIOSes, use PCI rather than PCI-e for WOL */
    + if (legacy_pme) {
    + u32 reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
    + reg1 |= PCI_Y2_PME_LEGACY;
    + sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
    + }
    +
    /* block receiver */
    sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
    sky2_read32(hw, B0_CTST);

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