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Subject[01/19] USB: xhci: fix OS want to own HC
2.6.32-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
@@ -444,7 +444,7 @@ 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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