specialix: Kill the BKL

Use the port mutex instead

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 2c24fcdc722a..7be456f760c9 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -1863,8 +1863,7 @@ static int sx_set_serial_info(struct specialix_port *port,
                 return -EFAULT;
         }
 
-        lock_kernel();
-
+        mutex_lock(&port->port.mutex);
         change_speed = ((port->port.flags & ASYNC_SPD_MASK) !=
                         (tmp.flags & ASYNC_SPD_MASK));
         change_speed |= (tmp.custom_divisor != port->custom_divisor);
@@ -1875,7 +1874,7 @@ static int sx_set_serial_info(struct specialix_port *port,
                     ((tmp.flags & ~ASYNC_USR_MASK) !=
                      (port->port.flags & ~ASYNC_USR_MASK))) {
                         func_exit();
-                        unlock_kernel();
+                        mutex_unlock(&port->port.mutex);
                         return -EPERM;
                 }
                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
@@ -1892,7 +1891,7 @@ static int sx_set_serial_info(struct specialix_port *port,
                 sx_change_speed(bp, port);
 
         func_exit();
-        unlock_kernel();
+        mutex_unlock(&port->port.mutex);
         return 0;
 }
 
@@ -1906,7 +1905,7 @@ static int sx_get_serial_info(struct specialix_port *port,
         func_enter();
 
         memset(&tmp, 0, sizeof(tmp));
-        lock_kernel();
+        mutex_lock(&port->port.mutex);
         tmp.type = PORT_CIRRUS;
         tmp.line = port - sx_port;
         tmp.port = bp->base;
@@ -1917,7 +1916,7 @@ static int sx_get_serial_info(struct specialix_port *port,
         tmp.closing_wait = port->port.closing_wait * HZ/100;
         tmp.custom_divisor =  port->custom_divisor;
         tmp.xmit_fifo_size = CD186x_NFIFO;
-        unlock_kernel();
+        mutex_unlock(&port->port.mutex);
         if (copy_to_user(retinfo, &tmp, sizeof(tmp))) {
                 func_exit();
                 return -EFAULT;