[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/mpsc.c b/drivers/serial/mpsc.c
index a2a643318002..e43276c6a954 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -1058,12 +1058,9 @@ mpsc_get_mctrl(struct uart_port *port)
 {
         struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
         u32 mflags, status;
-        ulong iflags;
 
-        spin_lock_irqsave(&pi->port.lock, iflags);
         status = (pi->mirror_regs) ? pi->MPSC_CHR_10_m :
                 readl(pi->mpsc_base + MPSC_CHR_10);
-        spin_unlock_irqrestore(&pi->port.lock, iflags);
 
         mflags = 0;
         if (status & 0x1)