1 files changed, 6 insertions, 3 deletions

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ff8872eba3ac..2a3283761600 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -60,6 +60,8 @@ enum port_dev_state {
  * @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
+ * @tx_bytes: number of bytes currently in host stack queues
+ * @tx_urbs: number of urbs currently in host stack queues
  * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
  *      port.
  * @write_wait: a wait_queue_head_t used by the port.
@@ -98,8 +100,8 @@ struct usb_serial_port {
         int                     write_urb_busy;
         __u8                    bulk_out_endpointAddress;
 
-        int                     tx_bytes_flight;
-        int                     urbs_in_flight;
+        int                     tx_bytes;
+        int                     tx_urbs;
 
         wait_queue_head_t       write_wait;
         struct work_struct      work;
@@ -223,7 +225,8 @@ struct usb_serial_driver {
         struct device_driver    driver;
         struct usb_driver       *usb_driver;
         struct usb_dynids       dynids;
-        int                     max_in_flight_urbs;
+
+        unsigned char           multi_urb_write:1;
 
         size_t                  bulk_in_size;
         size_t                  bulk_out_size;