1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 7a1164dd1d37..41d4ca527f82 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -89,6 +89,9 @@ static DEFINE_MUTEX(open_mutex);
 
 #define ACM_READY(acm)  (acm && acm->dev && acm->used)
 
+static const struct tty_port_operations acm_port_ops = {
+};
+
 #ifdef VERBOSE_DEBUG
 #define verbose 1
 #else
@@ -1082,6 +1085,8 @@ skip_normal_probe:
         spin_lock_init(&acm->read_lock);
         mutex_init(&acm->mutex);
         acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
+        tty_port_init(&acm->port);
+        acm->port.ops = &acm_port_ops;
 
         buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
         if (!buf) {