[PATCH] Serial: Adjust serial locking

This patch changes the way serial ports are locked when getting modem
status.  This change is necessary because we will need to atomically
read the modem status and take action depending on the CTS status.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 0 insertions, 3 deletions

diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 08b08d6ae904..461c81c93207 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -274,14 +274,11 @@ static unsigned int serial_pxa_tx_empty(struct uart_port *port)
 static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
 {
         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-        unsigned long flags;
         unsigned char status;
         unsigned int ret;
 
 return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
-        spin_lock_irqsave(&up->port.lock, flags);
         status = serial_in(up, UART_MSR);
-        spin_unlock_irqrestore(&up->port.lock, flags);
 
         ret = 0;
         if (status & UART_MSR_DCD)