Auto merge with /home/aegl/GIT/linus

[linux-2.6-omap-h63xx.git] / drivers / serial / sunzilog.c

diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index 8e65206d3d760c0542f8ee6bceb60bc235004f22..bff42a7b89d0ec6e02862fcd656a12500ccc144b 100644 (file)
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -610,27 +610,28 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id, struct pt_regs *reg
 static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port)
 {
        struct zilog_channel __iomem *channel;
-       unsigned long flags;
        unsigned char status;
 
-       spin_lock_irqsave(&port->lock, flags);
-
        channel = ZILOG_CHANNEL_FROM_PORT(port);
        status = sbus_readb(&channel->control);
        ZSDELAY();
 
-       spin_unlock_irqrestore(&port->lock, flags);
-
        return status;
 }
 
 /* The port lock is not held.  */
 static unsigned int sunzilog_tx_empty(struct uart_port *port)
 {
+       unsigned long flags;
        unsigned char status;
        unsigned int ret;
 
+       spin_lock_irqsave(&port->lock, flags);
+
        status = sunzilog_read_channel_status(port);
+
+       spin_unlock_irqrestore(&port->lock, flags);
+
        if (status & Tx_BUF_EMP)
                ret = TIOCSER_TEMT;
        else
@@ -639,7 +640,7 @@ static unsigned int sunzilog_tx_empty(struct uart_port *port)
        return ret;
 }
 
-/* The port lock is not held.  */
+/* The port lock is held and interrupts are disabled.  */
 static unsigned int sunzilog_get_mctrl(struct uart_port *port)
 {
        unsigned char status;