net/irda: Raise dtr in non-blocking open

DTR/RTS need to be raised, regardless of the open() mode, but not
if the port has already shutdown.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 522543d9264a..362ba47968e4 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -289,8 +289,15 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
          * If non-blocking mode is set, or the port is not enabled,
          * then make the check up front and then exit.
          */
-        if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
-                /* nonblock mode is set or port is not enabled */
+        if (test_bit(TTY_IO_ERROR, &tty->flags)) {
+                port->flags |= ASYNC_NORMAL_ACTIVE;
+                return 0;
+        }
+
+        if (filp->f_flags & O_NONBLOCK) {
+                /* nonblock mode is set */
+                if (tty->termios.c_cflag & CBAUD)
+                        tty_port_raise_dtr_rts(port);
                 port->flags |= ASYNC_NORMAL_ACTIVE;
                 IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ );
                 return 0;