1 files changed, 22 insertions, 29 deletions

diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index e99970a9437f..0542882cfbbe 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -125,12 +125,12 @@ static unsigned int owl_uart_tx_empty(struct uart_port *port)
 	u32 val;
 	unsigned int ret;
 
-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
 
 	val = owl_uart_read(port, OWL_UART_STAT);
 	ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0;
 
-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
 
 	return ret;
 }
@@ -199,6 +199,7 @@ static void owl_uart_receive_chars(struct uart_port *port)
 	stat = owl_uart_read(port, OWL_UART_STAT);
 	while (!(stat & OWL_UART_STAT_RFEM)) {
 		char flag = TTY_NORMAL;
+		bool sysrq;
 
 		if (stat & OWL_UART_STAT_RXER)
 			port->icount.overrun++;
@@ -217,7 +218,9 @@ static void owl_uart_receive_chars(struct uart_port *port)
 		val = owl_uart_read(port, OWL_UART_RXDAT);
 		val &= 0xff;
 
-		if ((stat & port->ignore_status_mask) == 0)
+		sysrq = uart_prepare_sysrq_char(port, val);
+
+		if (!sysrq && (stat & port->ignore_status_mask) == 0)
 			tty_insert_flip_char(&port->state->port, val, flag);
 
 		stat = owl_uart_read(port, OWL_UART_STAT);
@@ -229,10 +232,9 @@ static void owl_uart_receive_chars(struct uart_port *port)
 static irqreturn_t owl_uart_irq(int irq, void *dev_id)
 {
 	struct uart_port *port = dev_id;
-	unsigned long flags;
 	u32 stat;
 
-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock(port);
 
 	stat = owl_uart_read(port, OWL_UART_STAT);
 
@@ -246,7 +248,7 @@ static irqreturn_t owl_uart_irq(int irq, void *dev_id)
 	stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP;
 	owl_uart_write(port, stat, OWL_UART_STAT);
 
-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_unlock_and_check_sysrq(port);
 
 	return IRQ_HANDLED;
 }
@@ -256,14 +258,14 @@ static void owl_uart_shutdown(struct uart_port *port)
 	u32 val;
 	unsigned long flags;
 
-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
 
 	val = owl_uart_read(port, OWL_UART_CTL);
 	val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE
 		| OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN);
 	owl_uart_write(port, val, OWL_UART_CTL);
 
-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
 
 	free_irq(port->irq, port);
 }
@@ -279,7 +281,7 @@ static int owl_uart_startup(struct uart_port *port)
 	if (ret)
 		return ret;
 
-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
 
 	val = owl_uart_read(port, OWL_UART_STAT);
 	val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP
@@ -291,7 +293,7 @@ static int owl_uart_startup(struct uart_port *port)
 	val |= OWL_UART_CTL_EN;
 	owl_uart_write(port, val, OWL_UART_CTL);
 
-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
 
 	return 0;
 }
@@ -311,7 +313,7 @@ static void owl_uart_set_termios(struct uart_port *port,
 	u32 ctl;
 	unsigned long flags;
 
-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
 
 	ctl = owl_uart_read(port, OWL_UART_CTL);
 
@@ -371,7 +373,7 @@ static void owl_uart_set_termios(struct uart_port *port,
 
 	uart_update_timeout(port, termios->c_cflag, baud);
 
-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
 }
 
 static void owl_uart_release_port(struct uart_port *port)
@@ -508,18 +510,12 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
 {
 	u32 old_ctl, val;
 	unsigned long flags;
-	int locked;
+	int locked = 1;
 
-	local_irq_save(flags);
-
-	if (port->sysrq)
-		locked = 0;
-	else if (oops_in_progress)
-		locked = spin_trylock(&port->lock);
-	else {
-		spin_lock(&port->lock);
-		locked = 1;
-	}
+	if (oops_in_progress)
+		locked = uart_port_trylock_irqsave(port, &flags);
+	else
+		uart_port_lock_irqsave(port, &flags);
 
 	old_ctl = owl_uart_read(port, OWL_UART_CTL);
 	val = old_ctl | OWL_UART_CTL_TRFS_TX;
@@ -541,9 +537,7 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
 	owl_uart_write(port, old_ctl, OWL_UART_CTL);
 
 	if (locked)
-		spin_unlock(&port->lock);
-
-	local_irq_restore(flags);
+		uart_port_unlock_irqrestore(port, flags);
 }
 
 static void owl_uart_console_write(struct console *co, const char *s,
@@ -725,15 +719,13 @@ static int owl_uart_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int owl_uart_remove(struct platform_device *pdev)
+static void owl_uart_remove(struct platform_device *pdev)
 {
 	struct owl_uart_port *owl_port = platform_get_drvdata(pdev);
 
 	uart_remove_one_port(&owl_uart_driver, &owl_port->port);
 	owl_uart_ports[pdev->id] = NULL;
 	clk_disable_unprepare(owl_port->clk);
-
-	return 0;
 }
 
 static struct platform_driver owl_uart_platform_driver = {
@@ -769,4 +761,5 @@ static void __exit owl_uart_exit(void)
 module_init(owl_uart_init);
 module_exit(owl_uart_exit);
 
+MODULE_DESCRIPTION("Actions Semi Owl family serial console");
 MODULE_LICENSE("GPL");