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TTY: ircomm: fix DTR being raised on hang up 

Make sure to check ASYNC_INITIALISED before raising DTR when waking up
from blocked open in ircomm_tty_block_til_ready.

Currently DTR could get raised at hang up as a blocked process would
raise DTR unconditionally before checking for hang up and returning.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-04-12 10:32:31 +02:00 committed by Greg Kroah-Hartman
parent 53a72d5751
commit e1c969f781
1 changed files with 1 additions and 1 deletions
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2
net/irda/ircomm/ircomm_tty.c
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@ -328,7 +328,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
spin_unlock_irqrestore(&port->lock, flags);
while (1) {
if (tty->termios.c_cflag & CBAUD)
if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);