1 files changed, 2 insertions, 4 deletions

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ce911ebf91e8..1819396ed501 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -16,6 +16,7 @@
 #include <linux/kref.h>
 #include <linux/mutex.h>
 #include <linux/sysrq.h>
+#include <linux/kfifo.h>
 
 #define SERIAL_TTY_MAJOR        188     /* Nice legal number now */
 #define SERIAL_TTY_MINORS       254     /* loads of devices :) */
@@ -39,8 +40,6 @@ enum port_dev_state {
  * @serial: pointer back to the struct usb_serial owner of this port.
  * @port: pointer to the corresponding tty_port for this port.
  * @lock: spinlock to grab when updating portions of this structure.
- * @mutex: mutex used to synchronize serial_open() and serial_close()
- *      access for this port.
  * @number: the number of the port (the minor number).
  * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
  * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
@@ -77,7 +76,6 @@ struct usb_serial_port {
         struct usb_serial       *serial;
         struct tty_port         port;
         spinlock_t              lock;
-        struct mutex            mutex;
         unsigned char           number;
 
         unsigned char           *interrupt_in_buffer;
@@ -97,7 +95,7 @@ struct usb_serial_port {
         unsigned char           *bulk_out_buffer;
         int                     bulk_out_size;
         struct urb              *write_urb;
-        struct kfifo            *write_fifo;
+        struct kfifo            write_fifo;
         int                     write_urb_busy;
         __u8                    bulk_out_endpointAddress;