[PATCH 7/9] ARM: meson: serial: disable rx/tx irqs during console write

[Ben Dooks <ben.dooks@codethink.co.uk>]

As an attempt to stop issues with bad console output, ensure that both the
rx and tx interrupts are disabled during the console write to avoid any
problems with console and non-console being called together.

This should help with the SMP case as it should stop other cores being
signalled during the console write.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 drivers/tty/serial/meson_uart.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index d3f2c96..12436cc 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -472,7 +472,7 @@ static void meson_serial_console_write(struct console *co, const char *s,
 	struct uart_port *port;
 	unsigned long flags;
 	int locked;
-	u32 val;
+	u32 val, tmp;
 
 	port = meson_ports[co->index];
 	if (!port)
@@ -489,9 +489,12 @@ static void meson_serial_console_write(struct console *co, const char *s,
 	}
 
 	val = readl(port->membase + AML_UART_CONTROL);
-	writel(val | AML_UART_TX_EN, port->membase + AML_UART_CONTROL);
+	val |= AML_UART_TX_EN;
+	tmp = val & ~(AML_UART_TX_INT_EN | AML_UART_RX_INT_EN);
+	writel(tmp, port->membase + AML_UART_CONTROL);
 
 	uart_console_write(port, s, count, meson_console_putchar);
+	writel(val, port->membase + AML_UART_CONTROL);
 
 	if (locked)
 		spin_unlock(&port->lock);
-- 
2.6.2