1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index eafbbcf355e7..ff5ff6188809 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -547,6 +547,17 @@ static int mxser_carrier_raised(struct tty_port *port)
         return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 }
 
+static void mxser_raise_dtr_rts(struct tty_port *port)
+{
+        struct mxser_port *mp = container_of(port, struct mxser_port, port);
+        unsigned long flags;
+
+        spin_lock_irqsave(&mp->slock, flags);
+        outb(inb(mp->ioaddr + UART_MCR) |
+                UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+        spin_unlock_irqrestore(&mp->slock, flags);
+}
+
 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
                 struct mxser_port *mp)
 {
@@ -586,10 +597,7 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
         spin_unlock_irqrestore(&mp->slock, flags);
         port->blocked_open++;
         while (1) {
-                spin_lock_irqsave(&mp->slock, flags);
-                outb(inb(mp->ioaddr + UART_MCR) |
-                        UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
-                spin_unlock_irqrestore(&mp->slock, flags);
+                tty_port_raise_dtr_rts(port);
                 set_current_state(TASK_INTERRUPTIBLE);
                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
                         if (port->flags & ASYNC_HUP_NOTIFY)
@@ -2458,6 +2466,7 @@ static const struct tty_operations mxser_ops = {
 
 struct tty_port_operations mxser_port_ops = {
         .carrier_raised = mxser_carrier_raised,
+        .raise_dtr_rts = mxser_raise_dtr_rts,
 };
 
 /*