riscom8: split open and close methods up

Moving towards a tty_port method for open/close

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 171711a..9499991 100644 (file)
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -921,20 +921,12 @@ static void rc_flush_buffer(struct tty_struct *tty)
        tty_wakeup(tty);
 }
 
-static void rc_close(struct tty_struct *tty, struct file *filp)
+static void rc_close_port(struct tty_struct *tty, struct tty_port *port)
 {
-       struct riscom_port *port = tty->driver_data;
-       struct riscom_board *bp;
        unsigned long flags;
+       struct riscom_port *rp = container_of(port, struct riscom_port, port);
+       struct riscom_board *bp = port_Board(rp);
        unsigned long timeout;
-
-       if (!port || rc_paranoia_check(port, tty->name, "close"))
-               return;
-
-       bp = port_Board(port);
-       
-       if (tty_port_close_start(&port->port, tty, filp) == 0)
-               return;
        
        /*
         * At this point we stop accepting input.  To do this, we
@@ -944,29 +936,42 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
         */
 
        spin_lock_irqsave(&riscom_lock, flags);
-       port->IER &= ~IER_RXD;
-       if (port->port.flags & ASYNC_INITIALIZED) {
-               port->IER &= ~IER_TXRDY;
-               port->IER |= IER_TXEMPTY;
-               rc_out(bp, CD180_CAR, port_No(port));
-               rc_out(bp, CD180_IER, port->IER);
+       rp->IER &= ~IER_RXD;
+       if (port->flags & ASYNC_INITIALIZED) {
+               rp->IER &= ~IER_TXRDY;
+               rp->IER |= IER_TXEMPTY;
+               rc_out(bp, CD180_CAR, port_No(rp));
+               rc_out(bp, CD180_IER, rp->IER);
                /*
                 * Before we drop DTR, make sure the UART transmitter
                 * has completely drained; this is especially
                 * important if there is a transmit FIFO!
                 */
                timeout = jiffies + HZ;
-               while (port->IER & IER_TXEMPTY) {
+               while (rp->IER & IER_TXEMPTY) {
                        spin_unlock_irqrestore(&riscom_lock, flags);
-                       msleep_interruptible(jiffies_to_msecs(port->timeout));
+                       msleep_interruptible(jiffies_to_msecs(rp->timeout));
                        spin_lock_irqsave(&riscom_lock, flags);
                        if (time_after(jiffies, timeout))
                                break;
                }
        }
-       rc_shutdown_port(tty, bp, port);
-       rc_flush_buffer(tty);
+       rc_shutdown_port(tty, bp, rp);
        spin_unlock_irqrestore(&riscom_lock, flags);
+}
+
+static void rc_close(struct tty_struct *tty, struct file *filp)
+{
+       struct riscom_port *port = tty->driver_data;
+
+       if (!port || rc_paranoia_check(port, tty->name, "close"))
+               return;
+
+       if (tty_port_close_start(&port->port, tty, filp) == 0)
+               return;
+
+       rc_close_port(tty, &port->port);
+       rc_flush_buffer(tty);
 
        tty_port_close_end(&port->port, tty);
 }