diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 0d5a856..5e92c72 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -1262,13 +1262,35 @@
 			LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
 
 	xhci_zero_in_ctx(xhci, virt_dev);
-	/* Free any old rings */
+	/* Install new rings and free or cache any old rings */
 	for (i = 1; i < 31; ++i) {
-		if (virt_dev->eps[i].new_ring) {
-			xhci_ring_free(xhci, virt_dev->eps[i].ring);
-			virt_dev->eps[i].ring = virt_dev->eps[i].new_ring;
-			virt_dev->eps[i].new_ring = NULL;
+		int rings_cached;
+
+		if (!virt_dev->eps[i].new_ring)
+			continue;
+		/* Only cache or free the old ring if it exists.
+		 * It may not if this is the first add of an endpoint.
+		 */
+		if (virt_dev->eps[i].ring) {
+			rings_cached = virt_dev->num_rings_cached;
+			if (rings_cached < XHCI_MAX_RINGS_CACHED) {
+				virt_dev->num_rings_cached++;
+				rings_cached = virt_dev->num_rings_cached;
+				virt_dev->ring_cache[rings_cached] =
+					virt_dev->eps[i].ring;
+				xhci_dbg(xhci, "Cached old ring, "
+						"%d ring%s cached\n",
+						rings_cached,
+						(rings_cached > 1) ? "s" : "");
+			} else {
+				xhci_ring_free(xhci, virt_dev->eps[i].ring);
+				xhci_dbg(xhci, "Ring cache full (%d rings), "
+						"freeing ring\n",
+						virt_dev->num_rings_cached);
+			}
 		}
+		virt_dev->eps[i].ring = virt_dev->eps[i].new_ring;
+		virt_dev->eps[i].new_ring = NULL;
 	}
 
 	return ret;