diff --git a/[refs] b/[refs]
index 2168e731bc2e..aacb02e6ebf9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3b72fca09d7aed0c1a390370eb3f3f4f0480702a
+refs/heads/master: 3fe4fe083d3355537565b2b0a678807513dfa013
diff --git a/trunk/drivers/usb/host/xhci-mem.c b/trunk/drivers/usb/host/xhci-mem.c
index 1699df9f2568..bdea4de867b4 100644
--- a/trunk/drivers/usb/host/xhci-mem.c
+++ b/trunk/drivers/usb/host/xhci-mem.c
@@ -154,6 +154,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
 	if (!ring)
 		return NULL;
 
+	ring->num_segs = num_segs;
 	INIT_LIST_HEAD(&ring->td_list);
 	ring->type = type;
 	if (num_segs == 0)
@@ -177,6 +178,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
 		num_segs--;
 	}
 	xhci_link_segments(xhci, prev, ring->first_seg, type);
+	ring->last_seg = prev;
 
 	/* Only event ring does not use link TRB */
 	if (type != TYPE_EVENT) {
diff --git a/trunk/drivers/usb/host/xhci.h b/trunk/drivers/usb/host/xhci.h
index eb369a1723b1..2337a8e80b60 100644
--- a/trunk/drivers/usb/host/xhci.h
+++ b/trunk/drivers/usb/host/xhci.h
@@ -1262,6 +1262,7 @@ enum xhci_ring_type {
 
 struct xhci_ring {
 	struct xhci_segment	*first_seg;
+	struct xhci_segment	*last_seg;
 	union  xhci_trb		*enqueue;
 	struct xhci_segment	*enq_seg;
 	unsigned int		enq_updates;
@@ -1276,6 +1277,7 @@ struct xhci_ring {
 	 */
 	u32			cycle_state;
 	unsigned int		stream_id;
+	unsigned int		num_segs;
 	enum xhci_ring_type	type;
 	bool			last_td_was_short;
 };