usbip: vhci-hcd: Add USB3 SuperSpeed support

commit 1c9de5bf428612458427943b724bea51abde520a upstream.

This patch adds a USB3 HCD to an existing USB2 HCD and provides
the support of SuperSpeed, in case the device can only be enumerated
with SuperSpeed.

The bulk of the added code in usb3_bos_desc and hub_control to support
SuperSpeed is borrowed from the commit 1cd8fd2887e162ad ("usb: gadget:
dummy_hcd: add SuperSpeed support").

With this patch, each vhci will have VHCI_HC_PORTS HighSpeed ports
and VHCI_HC_PORTS SuperSpeed ports.

Suggested-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Yuyang Du <yuyang.du@intel.com>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 2c7bed7b19d69b6354e612bcca0435be166ef3dd..e480b924a04c42edad8ef1ed86be82eb2f8d61bc 100644 (file)
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -279,7 +279,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                case USB_PORT_FEAT_POWER:
                        usbip_dbg_vhci_rh(
                                " ClearPortFeature: USB_PORT_FEAT_POWER\n");
-                       dum->port_status[rhport] = 0;
+                       dum->port_status[rhport] &= ~USB_PORT_STAT_POWER;
                        dum->resuming = 0;
                        break;
                case USB_PORT_FEAT_C_RESET: