char: switch gs, cyclades and esp to return int for put_char

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, 3 deletions

diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index b1f92db31331..996d3230c929 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -1156,24 +1156,27 @@ static void change_speed(struct esp_struct *info)
         spin_unlock_irqrestore(&info->lock, 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 esp_struct *info = (struct esp_struct *)tty->driver_data;
         unsigned long flags;
+        int ret = 0;
 
         if (serial_paranoia_check(info, tty->name, "rs_put_char"))
-                return;
+                return 0;
 
         if (!info->xmit_buf)
-                return;
+                return 0;
 
         spin_lock_irqsave(&info->lock, flags);
         if (info->xmit_cnt < ESP_XMIT_SIZE - 1) {
                 info->xmit_buf[info->xmit_head++] = ch;
                 info->xmit_head &= ESP_XMIT_SIZE-1;
                 info->xmit_cnt++;
+                ret = 1;
         }
         spin_unlock_irqrestore(&info->lock, flags);
+        return ret;
 }
 
 static void rs_flush_chars(struct tty_struct *tty)