1 files changed, 2 insertions, 10 deletions

diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index c34d622dace4..b1aecc7bb32a 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -364,8 +364,6 @@ struct port {
         u8 toggle_ul;
         u16 token_dl;
 
-        /* mutex to ensure one access patch to this port */
-        struct mutex tty_sem;
         wait_queue_head_t tty_wait;
         struct async_icount tty_icount;
 
@@ -1474,7 +1472,6 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
                 struct device *tty_dev;
                 struct port *port = &dc->port[i];
                 port->dc = dc;
-                mutex_init(&port->tty_sem);
                 tty_port_init(&port->port);
                 port->port.ops = &noz_tty_port_ops;
                 tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
@@ -1688,8 +1685,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
         if (!dc || !port)
                 return -ENODEV;
 
-        mutex_lock(&port->tty_sem);
-
         rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
 
         /* notify card */
@@ -1714,7 +1709,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
         spin_unlock_irqrestore(&dc->spin_mutex, flags);
 
 exit:
-        mutex_unlock(&port->tty_sem);
         return rval;
 }
 
@@ -1733,11 +1727,9 @@ static int ntty_write_room(struct tty_struct *tty)
         int room = 4096;
         const struct nozomi *dc = get_dc_by_tty(tty);
 
-        if (dc) {
-                mutex_lock(&port->tty_sem);
+        if (dc)
                 room = kfifo_avail(&port->fifo_ul);
-                mutex_unlock(&port->tty_sem);
-        }
+
         return room;
 }