1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c
index 79ea98c66fa8..99fb7dc59c45 100644
--- a/drivers/usb/serial/aircable.c
+++ b/drivers/usb/serial/aircable.c
@@ -272,7 +272,7 @@ static void aircable_read(struct work_struct *work)
          * 64 bytes, to ensure I do not get throttled.
          * Ask USB mailing list for better aproach.
          */
-        tty = port->port.tty;
+        tty = tty_port_tty_get(&port->port);
 
         if (!tty) {
                 schedule_work(&priv->rx_work);
@@ -283,12 +283,13 @@ static void aircable_read(struct work_struct *work)
         count = min(64, serial_buf_data_avail(priv->rx_buf));
 
         if (count <= 0)
-                return; /* We have finished sending everything. */
+                goto out; /* We have finished sending everything. */
 
         tty_prepare_flip_string(tty, &data, count);
         if (!data) {
-                err("%s- kzalloc(%d) failed.", __func__, count);
-                return;
+                dev_err(&port->dev, "%s- kzalloc(%d) failed.",
+                                                        __func__, count);
+                goto out;
         }
 
         serial_buf_get(priv->rx_buf, data, count);
@@ -297,7 +298,8 @@ static void aircable_read(struct work_struct *work)
 
         if (serial_buf_data_avail(priv->rx_buf))
                 schedule_work(&priv->rx_work);
-
+out:            
+        tty_kref_put(tty);
         return;
 }
 /* End of private methods */
@@ -495,7 +497,7 @@ static void aircable_read_bulk_callback(struct urb *urb)
         usb_serial_debug_data(debug, &port->dev, __func__,
                                 urb->actual_length, urb->transfer_buffer);
 
-        tty = port->port.tty;
+        tty = tty_port_tty_get(&port->port);
         if (tty && urb->actual_length) {
                 if (urb->actual_length <= 2) {
                         /* This is an incomplete package */
@@ -527,6 +529,7 @@ static void aircable_read_bulk_callback(struct urb *urb)
                 }
                 aircable_read(&priv->rx_work);
         }
+        tty_kref_put(tty);
 
         /* Schedule the next read _if_ we are still open */
         if (port->port.count) {