diff options
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 7c4ebe6ee18..2b1ea3d4c4f 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -38,6 +38,7 @@ #include <linux/serial_8250.h> #include <linux/nmi.h> #include <linux/mutex.h> +#include <linux/slab.h> #include <asm/io.h> #include <asm/irq.h> @@ -2408,6 +2409,21 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios, } static void +serial8250_set_ldisc(struct uart_port *port) +{ + int line = port->line; + + if (line >= port->state->port.tty->driver->num) + return; + + if (port->state->port.tty->ldisc->ops->num == N_PPS) { + port->flags |= UPF_HARDPPS_CD; + serial8250_enable_ms(port); + } else + port->flags &= ~UPF_HARDPPS_CD; +} + +static void serial8250_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { @@ -2628,6 +2644,7 @@ static struct uart_ops serial8250_pops = { .startup = serial8250_startup, .shutdown = serial8250_shutdown, .set_termios = serial8250_set_termios, + .set_ldisc = serial8250_set_ldisc, .pm = serial8250_pm, .type = serial8250_type, .release_port = serial8250_release_port, |