amiserial: Switch put char to return success/fail

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index a5f3956a597..37457e5a4f2 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -832,33 +832,34 @@ static void change_speed(struct async_struct *info,
         local_irq_restore(flags);
 }
 
-static void rs_put_char(struct tty_struct *tty, unsigned char ch)
+static int rs_put_char(struct tty_struct *tty, unsigned char ch)
 {
         struct async_struct *info;
         unsigned long flags;
 
         if (!tty)
-                return;
+                return 0;
 
         info = tty->driver_data;
 
         if (serial_paranoia_check(info, tty->name, "rs_put_char"))
-                return;
+                return 0;
 
         if (!info->xmit.buf)
-                return;
+                return 0;
 
         local_irq_save(flags);
         if (CIRC_SPACE(info->xmit.head,
                        info->xmit.tail,
                        SERIAL_XMIT_SIZE) == 0) {
                 local_irq_restore(flags);
-                return;
+                return 0;
         }
 
         info->xmit.buf[info->xmit.head++] = ch;
         info->xmit.head &= SERIAL_XMIT_SIZE-1;
         local_irq_restore(flags);
+        return 1;
 }
 
 static void rs_flush_chars(struct tty_struct *tty)