USB: EHCI: Disable langwell/penwell LPM capability
authorAlek Du <alek.du@intel.com>
Mon, 6 Sep 2010 13:50:57 +0000 (14:50 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 20 Sep 2010 23:04:59 +0000 (16:04 -0700)
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>
drivers/usb/host/ehci-pci.c

index 58b72d741d9313b1f393a033cd0ed4cb89ad32ac..a1e8d273103f77b2d237a5f68438b289b51bb92a 100644 (file)
@@ -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) {