Index: sys/dev/usb/ohci.c
===================================================================
RCS file: /cvsroot/src/sys/dev/usb/ohci.c,v
retrieving revision 1.251
diff -u -p -r1.251 ohci.c
--- sys/dev/usb/ohci.c	5 Aug 2014 06:35:24 -0000	1.251
+++ sys/dev/usb/ohci.c	5 Aug 2014 07:45:42 -0000
@@ -2872,6 +2872,8 @@ ohci_root_intr_abort(usbd_xfer_handle xf
 	KASSERT(mutex_owned(&sc->sc_lock));
 	KASSERT(xfer->pipe->intrxfer == xfer);
 
+	sc->sc_intrxfer = NULL;
+
 	xfer->status = USBD_CANCELLED;
 	usb_transfer_complete(xfer);
 }
Index: sys/dev/usb/xhci.c
===================================================================
RCS file: /cvsroot/src/sys/dev/usb/xhci.c,v
retrieving revision 1.21
diff -u -p -r1.21 xhci.c
--- sys/dev/usb/xhci.c	5 Aug 2014 06:35:24 -0000	1.21
+++ sys/dev/usb/xhci.c	5 Aug 2014 07:45:46 -0000
@@ -2461,6 +2461,8 @@ xhci_root_intr_abort(usbd_xfer_handle xf
 
 	DPRINTF(("%s: remove\n", __func__));
 
+	sc->sc_intrxfer = NULL;
+
 	xfer->status = USBD_CANCELLED;
 	usb_transfer_complete(xfer);
 }
Index: sys/external/bsd/dwc2/dwc2.c
===================================================================
RCS file: /cvsroot/src/sys/external/bsd/dwc2/dwc2.c,v
retrieving revision 1.29
diff -u -p -r1.29 dwc2.c
--- sys/external/bsd/dwc2/dwc2.c	5 Aug 2014 06:35:24 -0000	1.29
+++ sys/external/bsd/dwc2/dwc2.c	5 Aug 2014 07:45:47 -0000
@@ -912,6 +912,8 @@ dwc2_root_intr_abort(usbd_xfer_handle xf
 	KASSERT(mutex_owned(&sc->sc_lock));
 	KASSERT(xfer->pipe->intrxfer == xfer);
 
+	sc->sc_intrxfer = NULL;
+
 	xfer->status = USBD_CANCELLED;
 	usb_transfer_complete(xfer);
 }