usb/isp1760: Added missing call to usb_hcd_check_unlink_urb() during unlink

Signed-off-by: Arvid Brodin <arvid.brodin@enea.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index 55d3d58..840beda 100644
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -1583,6 +1583,9 @@
 	int retval = 0;
 
 	spin_lock_irqsave(&priv->lock, spinflags);
+	retval = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (retval)
+		goto out;
 
 	qh = urb->ep->hcpriv;
 	if (!qh) {