1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index bb8e6656cca4..877813505ef2 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -677,6 +677,10 @@ struct xhci_virt_device {
         struct xhci_container_ctx       *out_ctx;
         /* Used for addressing devices and configuration changes */
         struct xhci_container_ctx       *in_ctx;
+        /* Rings saved to ensure old alt settings can be re-instated */
+        struct xhci_ring                **ring_cache;
+        int                             num_rings_cached;
+#define XHCI_MAX_RINGS_CACHED   31
         struct xhci_virt_ep             eps[31];
         struct completion               cmd_completion;
         /* Status of the last command issued for this device */