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TTY: clean up port drain-delay handling

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Move port drain-delay handling to a separate function.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-07 15:55:52 +01:00 committed by Greg Kroah-Hartman
parent 957dacaee5
commit b74414f5f3
1 changed files with 16 additions and 11 deletions
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27
drivers/tty/tty_port.c
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@ -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);