1 files changed, 39 insertions, 19 deletions

diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index f3d8d72e5ea4..6473ae023466 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -1097,6 +1097,7 @@ static int ioctl(struct tty_struct *tty, struct file *file,
         struct serial_icounter_struct __user *p_cuser;  /* user space */
         unsigned long flags;
         void __user *argp = (void __user *)arg;
+        int ret;
 
         if (sanity_check(info, tty->name, "ioctl"))
                 return -ENODEV;
@@ -1108,37 +1109,54 @@ static int ioctl(struct tty_struct *tty, struct file *file,
                     return -EIO;
         }
 
+        lock_kernel();
+
         switch (cmd) {
         case MGSL_IOCGPARAMS:
-                return get_params(info, argp);
+                ret = get_params(info, argp);
+                break;
         case MGSL_IOCSPARAMS:
-                return set_params(info, argp);
+                ret = set_params(info, argp);
+                break;
         case MGSL_IOCGTXIDLE:
-                return get_txidle(info, argp);
+                ret = get_txidle(info, argp);
+                break;
         case MGSL_IOCSTXIDLE:
-                return set_txidle(info, (int)arg);
+                ret = set_txidle(info, (int)arg);
+                break;
         case MGSL_IOCTXENABLE:
-                return tx_enable(info, (int)arg);
+                ret = tx_enable(info, (int)arg);
+                break;
         case MGSL_IOCRXENABLE:
-                return rx_enable(info, (int)arg);
+                ret = rx_enable(info, (int)arg);
+                break;
         case MGSL_IOCTXABORT:
-                return tx_abort(info);
+                ret = tx_abort(info);
+                break;
         case MGSL_IOCGSTATS:
-                return get_stats(info, argp);
+                ret = get_stats(info, argp);
+                break;
         case MGSL_IOCWAITEVENT:
-                return wait_mgsl_event(info, argp);
+                ret = wait_mgsl_event(info, argp);
+                break;
         case TIOCMIWAIT:
-                return modem_input_wait(info,(int)arg);
+                ret = modem_input_wait(info,(int)arg);
+                break;
         case MGSL_IOCGIF:
-                return get_interface(info, argp);
+                ret = get_interface(info, argp);
+                break;
         case MGSL_IOCSIF:
-                return set_interface(info,(int)arg);
+                ret = set_interface(info,(int)arg);
+                break;
         case MGSL_IOCSGPIO:
-                return set_gpio(info, argp);
+                ret = set_gpio(info, argp);
+                break;
         case MGSL_IOCGGPIO:
-                return get_gpio(info, argp);
+                ret = get_gpio(info, argp);
+                break;
         case MGSL_IOCWAITGPIO:
-                return wait_gpio(info, argp);
+                ret = wait_gpio(info, argp);
+                break;
         case TIOCGICOUNT:
                 spin_lock_irqsave(&info->lock,flags);
                 cnow = info->icount;
@@ -1155,12 +1173,14 @@ static int ioctl(struct tty_struct *tty, struct file *file,
                     put_user(cnow.parity, &p_cuser->parity) ||
                     put_user(cnow.brk, &p_cuser->brk) ||
                     put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
-                        return -EFAULT;
-                return 0;
+                        ret = -EFAULT;
+                ret = 0;
+                break;
         default:
-                return -ENOIOCTLCMD;
+                ret = -ENOIOCTLCMD;
         }
-        return 0;
+        unlock_kernel();
+        return ret;
 }
 
 /*