1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 105fa8b025bb..fcbf4abbf381 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -364,6 +364,30 @@ void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring)
                 xhci_debug_segment(xhci, seg);
 }
 
+void xhci_dbg_ep_rings(struct xhci_hcd *xhci,
+                unsigned int slot_id, unsigned int ep_index,
+                struct xhci_virt_ep *ep)
+{
+        int i;
+        struct xhci_ring *ring;
+
+        if (ep->ep_state & EP_HAS_STREAMS) {
+                for (i = 1; i < ep->stream_info->num_streams; i++) {
+                        ring = ep->stream_info->stream_rings[i];
+                        xhci_dbg(xhci, "Dev %d endpoint %d stream ID %d:\n",
+                                slot_id, ep_index, i);
+                        xhci_debug_segment(xhci, ring->deq_seg);
+                }
+        } else {
+                ring = ep->ring;
+                if (!ring)
+                        return;
+                xhci_dbg(xhci, "Dev %d endpoint ring %d:\n",
+                                slot_id, ep_index);
+                xhci_debug_segment(xhci, ring->deq_seg);
+        }
+}
+
 void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
 {
         u32 addr = (u32) erst->erst_dma_addr;