xhci: Switch only Intel Lynx Point-LP ports to EHCI on shutdown.

Patch "xhci: Switch Intel Lynx Point ports to EHCI on shutdown."
commit c09ec25d3684cad74d851c0f028a495999591279 is not fully correct

It switches both Lynx Point and Lynx Point-LP ports to EHCI on shutdown.
On some Lynx Point machines it causes spurious interrupt,
which wake the system: bugzilla.kernel.org/show_bug.cgi?id=76291

On Lynx Point-LP on the contrary switching ports to EHCI seems to be
necessary to fix these spurious interrupts.

Signed-off-by: Denis Turischev <denis@compulab.co.il>
Reported-by: Wulf Richartz <wulf.richartz@gmail.com>
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index ffd119e..e20520f 100644 (file)
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -134,7 +134,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
                 */
                if (pdev->subsystem_vendor == PCI_VENDOR_ID_HP)
                        xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
-
+       }
+       if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
+               pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI) {
                xhci->quirks |= XHCI_SPURIOUS_REBOOT;
        }
        if (pdev->vendor == PCI_VENDOR_ID_ETRON &&