TTY: simserial, use tty_port_close_start

I.e. remove more copied bloat.

The only change is that we wait_until_sent now. Which is what we
really should do.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 53db99a..2cd6d23 100644 (file)
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -430,45 +430,12 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
 {
        struct serial_state *info = tty->driver_data;
        struct tty_port *port = &info->port;
-       unsigned long flags;
 
        if (!info)
                return;
 
-       local_irq_save(flags);
-       if (tty_hung_up_p(filp)) {
-#ifdef SIMSERIAL_DEBUG
-               printk("rs_close: hung_up\n");
-#endif
-               local_irq_restore(flags);
-               return;
-       }
-#ifdef SIMSERIAL_DEBUG
-       printk("rs_close ttys%d, count = %d\n", info->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(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
-                      "port->count is %d\n", port->count);
-               port->count = 1;
-       }
-       if (--port->count < 0) {
-               printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
-                      tty->index, port->count);
-               port->count = 0;
-       }
-       if (port->count) {
-               local_irq_restore(flags);
+       if (tty_port_close_start(port, tty, filp) == 0)
                return;
-       }
-       port->flags |= ASYNC_CLOSING;
-       local_irq_restore(flags);
 
        /*
         * Now we wait for the transmit buffer to clear; and we notify
@@ -476,7 +443,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
         */
        shutdown(tty, info);
        rs_flush_buffer(tty);
-       tty_ldisc_flush(tty);
        port->tty = NULL;
 
        tty_port_close_end(port, tty);