xHCI: Clear link state change support

This patch adds support for Clear Port Feature(C_PORT_LINK_STATE)
request from usbcore.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 1ab7f2e..f3bafba 100644 (file)
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -361,6 +361,10 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
                status = PORT_PLC;
                port_change_bit = "suspend/resume";
                break;
+       case USB_PORT_FEAT_C_PORT_LINK_STATE:
+               status = PORT_PLC;
+               port_change_bit = "link state";
+               break;
        default:
                /* Should never happen */
                return;
@@ -639,6 +643,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                case USB_PORT_FEAT_C_CONNECTION:
                case USB_PORT_FEAT_C_OVER_CURRENT:
                case USB_PORT_FEAT_C_ENABLE:
+               case USB_PORT_FEAT_C_PORT_LINK_STATE:
                        xhci_clear_port_change_bit(xhci, wValue, wIndex,
                                        port_array[wIndex], temp);
                        break;