Messages in this thread Patch in this message | | | Date | Fri, 26 Aug 2011 14:58:22 -0700 | From | Greg KH <> | Subject | [01/19] USB: xhci: fix OS want to own HC |
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2.6.32-longterm review patch. If anyone has any objections, please let us know.
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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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