sx: prepare for BKL pushdown

Wrap the ioctl handler, and in this case the break handler also in the
BKL. Remove bogus softcar handlers.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index a6e1c9b..e97a21d 100644 (file)
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -1844,6 +1844,7 @@ static void sx_break(struct tty_struct *tty, int flag)
        int rv;
 
        func_enter();
+       lock_kernel();
 
        if (flag)
                rv = sx_send_command(port, HS_START, -1, HS_IDLE_BREAK);
@@ -1852,7 +1853,7 @@ static void sx_break(struct tty_struct *tty, int flag)
        if (rv != 1)
                printk(KERN_ERR "sx: couldn't send break (%x).\n",
                        read_sx_byte(port->board, CHAN_OFFSET(port, hi_hstat)));
-
+       unlock_kernel();
        func_exit();
 }
 
@@ -1888,23 +1889,12 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp,
        int rc;
        struct sx_port *port = tty->driver_data;
        void __user *argp = (void __user *)arg;
-       int ival;
 
        /* func_enter2(); */
 
        rc = 0;
+       lock_kernel();
        switch (cmd) {
-       case TIOCGSOFTCAR:
-               rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
-                               (unsigned __user *)argp);
-               break;
-       case TIOCSSOFTCAR:
-               if ((rc = get_user(ival, (unsigned __user *)argp)) == 0) {
-                       tty->termios->c_cflag =
-                               (tty->termios->c_cflag & ~CLOCAL) |
-                               (ival ? CLOCAL : 0);
-               }
-               break;
        case TIOCGSERIAL:
                rc = gs_getserial(&port->gs, argp);
                break;
@@ -1915,6 +1905,7 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp,
                rc = -ENOIOCTLCMD;
                break;
        }
+       unlock_kernel();
 
        /* func_exit(); */
        return rc;