usb: usbtest: support bos descriptor test for usb 3.0

In Test 9 of usbtest module, it is used for performing chapter 9 tests N
times. This patch adds to support getting bos descriptor test scenario for
USB 3.0.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 1fdd88f382cc..e7235d5cce85 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -689,6 +689,19 @@ static int ch9_postconfig(struct usbtest_dev *dev)
                 return (retval < 0) ? retval : -EDOM;
         }
 
+        /*
+         * there's always [9.4.3] a bos device descriptor [9.6.2] in USB
+         * 3.0 spec
+         */
+        if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0300) {
+                retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
+                                sizeof(*udev->bos->desc));
+                if (retval != sizeof(*udev->bos->desc)) {
+                        dev_err(&iface->dev, "bos descriptor --> %d\n", retval);
+                        return (retval < 0) ? retval : -EDOM;
+                }
+        }
+
         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
                 retval = usb_get_descriptor(udev, USB_DT_CONFIG, i,