This patch makes enable_ms() optional, so we can eliminate a lot of
empty enable_ms() implementations from driver code.
Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
---
drivers/tty/serial/serial_core.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 3ce68f9..8aa6e97 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1051,6 +1051,15 @@ static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state)
return ret;
}
+static void uart_enable_ms(struct uart_port *uport)
+{
+ /*
+ * Force modem status interrupts on
+ */
+ if (uport->ops->enable_ms)
+ uport->ops->enable_ms(uport);
+}
+
/*
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
* - mask passed in arg for lines of interest
@@ -1074,11 +1083,7 @@ uart_wait_modem_status(struct uart_state *state, unsigned long arg)
*/
spin_lock_irq(&uport->lock);
memcpy(&cprev, &uport->icount, sizeof(struct uart_icount));
-
- /*
- * Force modem status interrupts on
- */
- uport->ops->enable_ms(uport);
+ uart_enable_ms(uport);
spin_unlock_irq(&uport->lock);
add_wait_queue(&port->delta_msr_wait, &wait);
@@ -1509,7 +1514,7 @@ static int uart_carrier_raised(struct tty_port *port)
struct uart_port *uport = state->uart_port;
int mctrl;
spin_lock_irq(&uport->lock);
- uport->ops->enable_ms(uport);
+ uart_enable_ms(uport);
mctrl = uport->ops->get_mctrl(uport);
spin_unlock_irq(&uport->lock);
if (mctrl & TIOCM_CAR)
--
1.8.5.5
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