diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 397de6396da6b20cc3c5191fd7ebff569c2fb119..ddc7b8880f60894a1470c504d49f06aee0c33910 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -819,6 +819,8 @@ static void cdc_ncm_txpath_bh(unsigned long param)
 		netif_tx_lock_bh(ctx->netdev);
 		usbnet_start_xmit(NULL, ctx->netdev);
 		netif_tx_unlock_bh(ctx->netdev);
+	} else {
+		spin_unlock_bh(&ctx->mtx);
 	}
 }