USB: EHCI: Disable langwell/penwell LPM capability

We have to do so due to HW limitation.

Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 58b72d7..a1e8d27 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -119,6 +119,11 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                        ehci->broken_periodic = 1;
                        ehci_info(ehci, "using broken periodic workaround\n");
                }
+               if (pdev->device == 0x0806 || pdev->device == 0x0811
+                               || pdev->device == 0x0829) {
+                       ehci_info(ehci, "disable lpm for langwell/penwell\n");
+                       ehci->has_lpm = 0;
+               }
                break;
        case PCI_VENDOR_ID_TDI:
                if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {