1 files changed, 11 insertions, 8 deletions

diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index 660bae5ba179..7633132a10aa 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -65,8 +65,8 @@ static struct uart_driver mux_driver = {
 
 static struct timer_list mux_timer;
 
-#define UART_PUT_CHAR(p, c) __raw_writel((c), (unsigned long)(p)->membase + IO_DATA_REG_OFFSET)
-#define UART_GET_FIFO_CNT(p) __raw_readl((unsigned long)(p)->membase + IO_DCOUNT_REG_OFFSET)
+#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET)
+#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET)
 #define GET_MUX_PORTS(iodc_data) ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8
 
 /**
@@ -79,10 +79,7 @@ static struct timer_list mux_timer;
  */
 static unsigned int mux_tx_empty(struct uart_port *port)
 {
-        unsigned int cnt = __raw_readl((unsigned long)port->membase 
-                                + IO_DCOUNT_REG_OFFSET);
-
-        return cnt ? 0 : TIOCSER_TEMT;
+        return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT;
 } 
 
 /**
@@ -218,8 +215,7 @@ static void mux_read(struct uart_port *port)
         __u32 start_count = port->icount.rx;
 
         while(1) {
-                data = __raw_readl((unsigned long)port->membase
-                                                + IO_DATA_REG_OFFSET);
+                data = __raw_readl(port->membase + IO_DATA_REG_OFFSET);
 
                 if (MUX_STATUS(data))
                         continue;
@@ -481,6 +477,13 @@ static int __init mux_probe(struct parisc_device *dev)
                 port->ops       = &mux_pops;
                 port->flags     = UPF_BOOT_AUTOCONF;
                 port->line      = port_cnt;
+
+                /* The port->timeout needs to match what is present in
+                 * uart_wait_until_sent in serial_core.c.  Otherwise
+                 * the time spent in msleep_interruptable will be very
+                 * long, causing the appearance of a console hang.
+                 */
+                port->timeout   = HZ / 50;
                 spin_lock_init(&port->lock);
                 status = uart_add_one_port(&mux_driver, port);
                 BUG_ON(status);