TTY: amiserial, use tty_port_close_start

Again, no need to duplicate the code. Let's use the helper.

Amiserial changes are only free of compilation errors. I have no
access to the hardware.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 42 deletions

diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 9c8b199bad35..afadcd43d14e 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1389,53 +1389,13 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
 {
         struct serial_state *state = tty->driver_data;
         struct tty_port *port = &state->tport;
-        unsigned long flags;
 
-        if (!state || serial_paranoia_check(state, tty->name, "rs_close"))
+        if (serial_paranoia_check(state, tty->name, "rs_close"))
                 return;
 
-        local_irq_save(flags);
-
-        if (tty_hung_up_p(filp)) {
-                DBG_CNT("before DEC-hung");
-                local_irq_restore(flags);
+        if (tty_port_close_start(port, tty, filp) == 0)
                 return;
-        }
 
-#ifdef SERIAL_DEBUG_OPEN
-        printk("rs_close ttys%d, count = %d\n", state->line, port->count);
-#endif
-        if ((tty->count == 1) && (port->count != 1)) {
-                /*
-                 * Uh, oh.  tty->count is 1, which means that the tty
-                 * structure will be freed.  port->count should always
-                 * be one in these conditions.  If it's greater than
-                 * one, we've got real problems, since it means the
-                 * serial port won't be shutdown.
-                 */
-                printk("rs_close: bad serial port count; tty->count is 1, "
-                       "port->count is %d\n", state->tport.count);
-                port->count = 1;
-        }
-        if (--port->count < 0) {
-                printk("rs_close: bad serial port count for ttys%d: %d\n",
-                       tty->index, port->count);
-                port->count = 0;
-        }
-        if (port->count) {
-                DBG_CNT("before DEC-2");
-                local_irq_restore(flags);
-                return;
-        }
-        port->flags |= ASYNC_CLOSING;
-        /*
-         * Now we wait for the transmit buffer to clear; and we notify 
-         * the line discipline to only process XON/XOFF characters.
-         */
-        tty->closing = 1;
-        local_irq_restore(flags);
-        if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-                tty_wait_until_sent(tty, port->closing_wait);
         /*
          * At this point we stop accepting input.  To do this, we
          * disable the receive line status interrupts, and tell the