1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 06fca0835b52..45e4a3108cc3 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1549,6 +1549,15 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
                 cmd_completion = command->completion;
                 cmd_status = &command->status;
                 command->command_trb = xhci->cmd_ring->enqueue;
+
+                /* Enqueue pointer can be left pointing to the link TRB,
+                 * we must handle that
+                 */
+                if ((command->command_trb->link.control & TRB_TYPE_BITMASK)
+                                == TRB_TYPE(TRB_LINK))
+                        command->command_trb =
+                                xhci->cmd_ring->enq_seg->next->trbs;
+
                 list_add_tail(&command->cmd_list, &virt_dev->cmd_list);
         } else {
                 in_ctx = virt_dev->in_ctx;
@@ -2272,6 +2281,15 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
         /* Attempt to submit the Reset Device command to the command ring */
         spin_lock_irqsave(&xhci->lock, flags);
         reset_device_cmd->command_trb = xhci->cmd_ring->enqueue;
+
+        /* Enqueue pointer can be left pointing to the link TRB,
+         * we must handle that
+         */
+        if ((reset_device_cmd->command_trb->link.control & TRB_TYPE_BITMASK)
+                        == TRB_TYPE(TRB_LINK))
+                reset_device_cmd->command_trb =
+                        xhci->cmd_ring->enq_seg->next->trbs;
+
         list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list);
         ret = xhci_queue_reset_device(xhci, slot_id);
         if (ret) {