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    Subject[02/20] USB: xhci: fix OS want to own HC
    2.6.33-longterm review patch.  If anyone has any objections, please let us know.

    ------------------
    From: JiSheng Zhang <jszhang3@gmail.com>

    commit 6768458b17f9bf48a4c3a34e49b20344091b5f7e upstream.

    Software should set XHCI_HC_OS_OWNED bit to request ownership of xHC.

    This patch should be backported to kernels as far back as 2.6.31.

    Signed-off-by: JiSheng Zhang <jszhang3@gmail.com>
    Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/usb/host/pci-quirks.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)
    --- a/drivers/usb/host/pci-quirks.c
    +++ b/drivers/usb/host/pci-quirks.c
    @@ -412,7 +412,7 @@ static void __devinit quirk_usb_handoff_

    /* If the BIOS owns the HC, signal that the OS wants it, and wait */
    if (val & XHCI_HC_BIOS_OWNED) {
    - writel(val & XHCI_HC_OS_OWNED, base + ext_cap_offset);
    + writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);

    /* Wait for 5 seconds with 10 microsecond polling interval */
    timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,



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