1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 7b85e327af91..c17eb64d7213 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -59,6 +59,7 @@ enum port_dev_state {
  * @bulk_out_buffer: pointer to the bulk out buffer for this port.
  * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
  * @write_urb: pointer to the bulk out struct urb for this port.
+ * @write_fifo: kfifo used to buffer outgoing data
  * @write_urb_busy: port`s writing status
  * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
  *      port.
@@ -96,6 +97,7 @@ struct usb_serial_port {
         unsigned char           *bulk_out_buffer;
         int                     bulk_out_size;
         struct urb              *write_urb;
+        struct kfifo            *write_fifo;
         int                     write_urb_busy;
         __u8                    bulk_out_endpointAddress;