1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index 433b3f44f42e..8d158e5640e3 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -170,7 +170,7 @@ static int gs_open(struct tty_struct *tty, struct file *file);
 static void gs_close(struct tty_struct *tty, struct file *file);
 static int gs_write(struct tty_struct *tty,
         const unsigned char *buf, int count);
-static void gs_put_char(struct tty_struct *tty, unsigned char ch);
+static int gs_put_char(struct tty_struct *tty, unsigned char ch);
 static void gs_flush_chars(struct tty_struct *tty);
 static int gs_write_room(struct tty_struct *tty);
 static int gs_chars_in_buffer(struct tty_struct *tty);
@@ -883,14 +883,15 @@ exit:
 /*
  * gs_put_char
  */
-static void gs_put_char(struct tty_struct *tty, unsigned char ch)
+static int gs_put_char(struct tty_struct *tty, unsigned char ch)
 {
         unsigned long flags;
         struct gs_port *port = tty->driver_data;
+        int ret = 0;
 
         if (port == NULL) {
                 pr_err("gs_put_char: NULL port pointer\n");
-                return;
+                return 0;
         }
 
         gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p\n",
@@ -910,10 +911,11 @@ static void gs_put_char(struct tty_struct *tty, unsigned char ch)
                 goto exit;
         }
 
-        gs_buf_put(port->port_write_buf, &ch, 1);
+        ret = gs_buf_put(port->port_write_buf, &ch, 1);
 
 exit:
         spin_unlock_irqrestore(&port->port_lock, flags);
+        return ret;
 }
 
 /*