1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 28f63566ab8a..97b1291ec224 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1091,16 +1091,16 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
         return total;
 }
 
-static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
+static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
 {
         struct mxser_port *info = tty->driver_data;
         unsigned long flags;
 
         if (!info->xmit_buf)
-                return;
+                return 0;
 
         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
-                return;
+                return 0;
 
         spin_lock_irqsave(&info->slock, flags);
         info->xmit_buf[info->xmit_head++] = ch;
@@ -1118,6 +1118,7 @@ static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
                         spin_unlock_irqrestore(&info->slock, flags);
                 }
         }
+        return 1;
 }