linux-kernel - [PATCH 13/18] tty: serial: samsung: return bool for s3c24xx_serial_txempty

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Date: Wed, 10 Jan 2024 10:20:57 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: krzysztof.kozlowski@...aro.org,
	alim.akhtar@...sung.com,
	gregkh@...uxfoundation.org,
	jirislaby@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	andre.draszik@...aro.org,
	peter.griffin@...aro.org,
	kernel-team@...roid.com,
	willmcvicker@...gle.com,
	Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 13/18] tty: serial: samsung: return bool for s3c24xx_serial_txempty_nofifo()

s3c24xx_serial_txempty_nofifo() returned either 0 or BIT(2), which is
counterintuitive. Make the method return bool, and return true when TX
is empty and false otherwise.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 drivers/tty/serial/samsung_tty.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 46fba70f3d77..63e993bed296 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -236,9 +236,9 @@ static inline const char *s3c24xx_serial_portname(const struct uart_port *port)
 	return to_platform_device(port->dev)->name;
 }
 
-static int s3c24xx_serial_txempty_nofifo(const struct uart_port *port)
+static bool s3c24xx_serial_txempty_nofifo(const struct uart_port *port)
 {
-	return rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE;
+	return !!(rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE);
 }
 
 static void s3c24xx_serial_rx_enable(struct uart_port *port)
@@ -782,7 +782,7 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport)
 		ch = rd_reg(port, S3C2410_URXH);
 
 		if (port->flags & UPF_CONS_FLOW) {
-			int txe = s3c24xx_serial_txempty_nofifo(port);
+			bool txe = s3c24xx_serial_txempty_nofifo(port);
 
 			if (ourport->rx_enabled) {
 				if (!txe) {
-- 
2.43.0.472.g3155946c3a-goog