amiserial: Switch put char to return success/fail
authorAlan Cox <alan@lxorguk.ukuu.org.uk>
Wed, 30 Apr 2008 07:54:02 +0000 (00:54 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 30 Apr 2008 15:29:45 +0000 (08:29 -0700)
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>
drivers/char/amiserial.c

index a5f3956a5971255401d471cf122fe5d2a12b6295..37457e5a4f2b8ce6d06f728788dbeee2a54e3fee 100644 (file)
@@ -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)