serial/8250/8250_port.c

542 	if (p->em485)
545 	p->em485 = kmalloc(sizeof(struct uart_8250_em485), GFP_ATOMIC);
546 	if (!p->em485)
549 	hrtimer_init(&p->em485->stop_tx_timer, CLOCK_MONOTONIC,
551 	hrtimer_init(&p->em485->start_tx_timer, CLOCK_MONOTONIC,
553 	p->em485->stop_tx_timer.function = &serial8250_em485_handle_stop_tx;
554 	p->em485->start_tx_timer.function = &serial8250_em485_handle_start_tx;
555 	p->em485->port = p;
556 	p->em485->active_timer = NULL;
557 	p->em485->tx_stopped = true;
560 	if (p->em485->tx_stopped)
581 	if (!p->em485)
584 	hrtimer_cancel(&p->em485->start_tx_timer);
585 	hrtimer_cancel(&p->em485->stop_tx_timer);
587 	kfree(p->em485);
588 	p->em485 = NULL;
1421 	struct uart_8250_em485 *em485 = container_of(t, struct uart_8250_em485,
1423 	struct uart_8250_port *p = em485->port;
1428 	if (em485->active_timer == &em485->stop_tx_timer) {
1430 		em485->active_timer = NULL;
1431 		em485->tx_stopped = true;
1446 	struct uart_8250_em485 *em485 = p->em485;
1458 		em485->active_timer = &em485->stop_tx_timer;
1459 		hrtimer_start(&em485->stop_tx_timer, ns_to_ktime(stop_delay), HRTIMER_MODE_REL);
1462 		em485->active_timer = NULL;
1463 		em485->tx_stopped = true;
1469 	struct uart_8250_em485 *em485 = p->em485;
1471 	if (em485) {
1576 	struct uart_8250_em485 *em485 = up->em485;
1580 	 * em485->active_timer != &em485->stop_tx_timer, it might happen that
1582 	 * chars is send and em485->active_timer == &em485->stop_tx_timer again.
1585 	 * em485->active_timer when &em485->stop_tx_timer is armed again.
1587 	if (em485->active_timer == &em485->stop_tx_timer)
1588 		hrtimer_try_to_cancel(&em485->stop_tx_timer);
1590 	em485->active_timer = NULL;
1592 	if (em485->tx_stopped) {
1593 		em485->tx_stopped = false;
1598 			em485->active_timer = &em485->start_tx_timer;
1599 			start_hrtimer_ms(&em485->start_tx_timer,
1610 	struct uart_8250_em485 *em485 = container_of(t, struct uart_8250_em485,
1612 	struct uart_8250_port *p = em485->port;
1616 	if (em485->active_timer == &em485->start_tx_timer) {
1618 		em485->active_timer = NULL;
1628 	struct uart_8250_em485 *em485 = up->em485;
1638 	if (em485) {
1639 		if ((em485->active_timer == &em485->start_tx_timer) ||
3344 	struct uart_8250_em485 *em485 = up->em485;
3369 	if (em485) {
3370 		if (em485->tx_stopped)
3406 	if (em485) {
3408 		if (em485->tx_stopped)