rocket: Prepare for BKL pushdown

Wrap the ioctl code in lock_kernel calls

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/rocket.c b/drivers/char/rocket.c
index f585bc8..1b3fc6f 100644 (file)
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -1433,29 +1433,38 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file,
 {
        struct r_port *info = (struct r_port *) tty->driver_data;
        void __user *argp = (void __user *)arg;
+       int ret = 0;
 
        if (cmd != RCKP_GET_PORTS && rocket_paranoia_check(info, "rp_ioctl"))
                return -ENXIO;
 
+       lock_kernel();
+
        switch (cmd) {
        case RCKP_GET_STRUCT:
                if (copy_to_user(argp, info, sizeof (struct r_port)))
-                       return -EFAULT;
-               return 0;
+                       ret = -EFAULT;
+               break;
        case RCKP_GET_CONFIG:
-               return get_config(info, argp);
+               ret = get_config(info, argp);
+               break;
        case RCKP_SET_CONFIG:
-               return set_config(info, argp);
+               ret = set_config(info, argp);
+               break;
        case RCKP_GET_PORTS:
-               return get_ports(info, argp);
+               ret = get_ports(info, argp);
+               break;
        case RCKP_RESET_RM2:
-               return reset_rm2(info, argp);
+               ret = reset_rm2(info, argp);
+               break;
        case RCKP_GET_VERSION:
-               return get_version(info, argp);
+               ret = get_version(info, argp);
+               break;
        default:
-               return -ENOIOCTLCMD;
+               ret = -ENOIOCTLCMD;
        }
-       return 0;
+       unlock_kernel();
+       return ret;
 }
 
 static void rp_send_xchar(struct tty_struct *tty, char ch)