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Commit b74414f5 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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TTY: clean up port drain-delay handling 



Move port drain-delay handling to a separate function.

Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 957dacae

drivers/tty/tty_port.c

+16 −11
Original line number Diff line number Diff line
@@ -441,6 +441,20 @@ int tty_port_block_til_ready(struct tty_port *port, 
}

EXPORT_SYMBOL(tty_port_block_til_ready);



static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)

{

	unsigned int bps = tty_get_baud_rate(tty);

	long timeout;



	if (bps > 1200) {

		timeout = (HZ * 10 * port->drain_delay) / bps;

		timeout = max_t(long, timeout, HZ / 10);

	} else {

		timeout = 2 * HZ;

	}

	schedule_timeout_interruptible(timeout);

}



int tty_port_close_start(struct tty_port *port,

				struct tty_struct *tty, struct file *filp)

{
@@ -479,17 +493,8 @@ int tty_port_close_start(struct tty_port *port, 
	if (test_bit(ASYNCB_INITIALIZED, &port->flags) &&

			port->closing_wait != ASYNC_CLOSING_WAIT_NONE)

		tty_wait_until_sent_from_close(tty, port->closing_wait);

	if (port->drain_delay) {

		unsigned int bps = tty_get_baud_rate(tty);

		long timeout;



		if (bps > 1200)

			timeout = max_t(long,

				(HZ * 10 * port->drain_delay) / bps, HZ / 10);

		else

			timeout = 2 * HZ;

		schedule_timeout_interruptible(timeout);

	}

	if (port->drain_delay)

		tty_port_drain_delay(port, tty);

	/* Flush the ldisc buffering */

	tty_ldisc_flush(tty);