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Commit 53a72d57 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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TTY: synclinkmp: fix DTR being raised on hang up 



Make sure to check ASYNC_INITIALISED before raising DTR when waking up
from blocked open in 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: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5d8be15a

drivers/tty/synclinkmp.c

+1 −1
Original line number Diff line number Diff line
@@ -3329,7 +3329,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, 
	port->blocked_open++;



	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);