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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>
This commit is contained in:
Peter Hurley 2013-03-05 06:09:07 +00:00 committed by David S. Miller
parent 0b176ce3a7
commit f74861ca87
1 changed files with 9 additions and 2 deletions
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11
net/irda/ircomm/ircomm_tty.c
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@ -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;