--- zzzz-none-000/linux-3.10.107/drivers/usb/wusbcore/pal.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/usb/wusbcore/pal.c	2021-02-04 17:41:59.000000000 +0000
@@ -22,6 +22,7 @@
 {
 	struct wusbhc *wusbhc = container_of(pal, struct wusbhc, pal);
 
+	dev_dbg(wusbhc->dev, "%s: channel = %d\n", __func__, channel);
 	if (channel < 0)
 		wusbhc_stop(wusbhc);
 	else
@@ -45,10 +46,11 @@
 }
 
 /**
- * wusbhc_pal_register - unregister the WUSB HC as a UWB PAL
+ * wusbhc_pal_unregister - unregister the WUSB HC as a UWB PAL
  * @wusbhc: the WUSB HC
  */
 void wusbhc_pal_unregister(struct wusbhc *wusbhc)
 {
-	uwb_pal_unregister(&wusbhc->pal);
+	if (wusbhc->uwb_rc)
+		uwb_pal_unregister(&wusbhc->pal);
 }