1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 643c2f3f3e73..75c857ec55b9 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -280,6 +280,9 @@ static inline int room_on_ring(struct xhci_hcd *xhci, struct xhci_ring *ring,
 /* Ring the host controller doorbell after placing a command on the ring */
 void xhci_ring_cmd_db(struct xhci_hcd *xhci)
 {
+        if (!(xhci->cmd_ring_state & CMD_RING_STATE_RUNNING))
+                return;
+
         xhci_dbg(xhci, "// Ding dong!\n");
         xhci_writel(xhci, DB_VALUE_HOST, &xhci->dba->doorbell[0]);
         /* Flush PCI posted writes */