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

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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>
This commit is contained in:
Alan Cox
2008-04-30 00:54:03 -07:00
committed by Linus Torvalds
parent 257afa3cb6
commit 76b25a5509
4 changed files with 18 additions and 13 deletions
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drivers/char/esp.c
+6 -3
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@@ -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)