1 files changed, 30 insertions, 26 deletions

diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index bbb5595d7e24..6ed9a327702b 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -387,9 +387,9 @@ static unsigned int asc_get_mctrl(struct uart_port *port)
 /* There are probably characters waiting to be transmitted. */
 static void asc_start_tx(struct uart_port *port)
 {
-	struct circ_buf *xmit = &port->state->xmit;
+	struct tty_port *tport = &port->state->port;
 
-	if (!uart_circ_empty(xmit))
+	if (!kfifo_is_empty(&tport->xmit_fifo))
 		asc_enable_tx_interrupts(port);
 }
 
@@ -465,6 +465,7 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
 			    const struct ktermios *old)
 {
 	struct asc_port *ascport = to_asc_port(port);
+	bool manual_rts, toggle_rts = false;
 	struct gpio_desc *gpiod;
 	unsigned int baud;
 	u32 ctrl_val;
@@ -518,25 +519,13 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
 
 		/* If flow-control selected, stop handling RTS manually */
 		if (ascport->rts) {
-			devm_gpiod_put(port->dev, ascport->rts);
-			ascport->rts = NULL;
-
-			pinctrl_select_state(ascport->pinctrl,
-					     ascport->states[DEFAULT]);
+			toggle_rts = true;
+			manual_rts = false;
 		}
 	} else {
 		/* If flow-control disabled, it's safe to handle RTS manually */
-		if (!ascport->rts && ascport->states[NO_HW_FLOWCTRL]) {
-			pinctrl_select_state(ascport->pinctrl,
-					     ascport->states[NO_HW_FLOWCTRL]);
-
-			gpiod = devm_gpiod_get(port->dev, "rts", GPIOD_OUT_LOW);
-			if (!IS_ERR(gpiod)) {
-				gpiod_set_consumer_name(gpiod,
-						port->dev->of_node->name);
-				ascport->rts = gpiod;
-			}
-		}
+		if (!ascport->rts && ascport->states[NO_HW_FLOWCTRL])
+			manual_rts = toggle_rts = true;
 	}
 
 	if ((baud < 19200) && !ascport->force_m1) {
@@ -595,6 +584,25 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
 	asc_out(port, ASC_CTL, (ctrl_val | ASC_CTL_RUN));
 
 	uart_port_unlock_irqrestore(port, flags);
+
+	if (toggle_rts) {
+		if (manual_rts) {
+			pinctrl_select_state(ascport->pinctrl,
+					     ascport->states[NO_HW_FLOWCTRL]);
+
+			gpiod = devm_gpiod_get(port->dev, "rts", GPIOD_OUT_LOW);
+			if (!IS_ERR(gpiod)) {
+				gpiod_set_consumer_name(gpiod,
+							port->dev->of_node->name);
+				ascport->rts = gpiod;
+			}
+		} else {
+				devm_gpiod_put(port->dev, ascport->rts);
+				ascport->rts = NULL;
+				pinctrl_select_state(ascport->pinctrl,
+						     ascport->states[DEFAULT]);
+		}
+	}
 }
 
 static const char *asc_type(struct uart_port *port)
@@ -800,7 +808,6 @@ static void asc_serial_remove(struct platform_device *pdev)
 	uart_remove_one_port(&asc_uart_driver, port);
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int asc_serial_suspend(struct device *dev)
 {
 	struct uart_port *port = dev_get_drvdata(dev);
@@ -815,8 +822,6 @@ static int asc_serial_resume(struct device *dev)
 	return uart_resume_port(&asc_uart_driver, port);
 }
 
-#endif /* CONFIG_PM_SLEEP */
-
 /*----------------------------------------------------------------------*/
 
 #ifdef CONFIG_SERIAL_ST_ASC_CONSOLE
@@ -924,16 +929,15 @@ static struct uart_driver asc_uart_driver = {
 	.cons		= ASC_SERIAL_CONSOLE,
 };
 
-static const struct dev_pm_ops asc_serial_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(asc_serial_suspend, asc_serial_resume)
-};
+static DEFINE_SIMPLE_DEV_PM_OPS(asc_serial_pm_ops, asc_serial_suspend,
+						   asc_serial_resume);
 
 static struct platform_driver asc_serial_driver = {
 	.probe		= asc_serial_probe,
-	.remove_new	= asc_serial_remove,
+	.remove		= asc_serial_remove,
 	.driver	= {
 		.name	= DRIVER_NAME,
-		.pm	= &asc_serial_pm_ops,
+		.pm	= pm_sleep_ptr(&asc_serial_pm_ops),
 		.of_match_table = of_match_ptr(asc_match),
 	},
 };