USB: usbtest fix endless loop in unlink tests.

	 */

	 */

	msleep (jiffies % (2 * INTERRUPT_RATE));

	msleep (jiffies % (2 * INTERRUPT_RATE));

	if (async) {

	if (async) {

retry:

		while (!completion_done(&completion)) {

			retval = usb_unlink_urb(urb);

			retval = usb_unlink_urb(urb);

		if (retval == -EBUSY || retval == -EIDRM) {

			/* we can't unlink urbs while they're completing.

			switch (retval) {

			 * or if they've completed, and we haven't resubmitted.

			case -EBUSY:

			 * "normal" drivers would prevent resubmission, but

			case -EIDRM:

			 * since we're testing unlink paths, we can't.

				/* we can't unlink urbs while they're completing

				 * or if they've completed, and we haven't

				 * resubmitted. "normal" drivers would prevent

				 * resubmission, but since we're testing unlink

				 * paths, we can't.

				 */

				 */

				ERROR(dev, "unlink retry\n");

				ERROR(dev, "unlink retry\n");

			goto retry;

				continue;

			case 0:

			case -EINPROGRESS:

				break;

			default:

				dev_err(&dev->intf->dev,

					"unlink fail %d\n", retval);

				return retval;

			}

			break;

		}

		}

	} else

	} else

		usb_kill_urb (urb);

		usb_kill_urb (urb);

	if (!(retval == 0 || retval == -EINPROGRESS)) {

		dev_err(&dev->intf->dev, "unlink fail %d\n", retval);

		return retval;

	}

	wait_for_completion (&completion);

	wait_for_completion (&completion);

	retval = urb->status;

	retval = urb->status;