1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/isdn/mISDN/timerdev.c b/drivers/isdn/mISDN/timerdev.c
index 8785004e85e0..c3243c913ec0 100644
--- a/drivers/isdn/mISDN/timerdev.c
+++ b/drivers/isdn/mISDN/timerdev.c
@@ -24,6 +24,7 @@
 #include <linux/miscdevice.h>
 #include <linux/module.h>
 #include <linux/mISDNif.h>
+#include <linux/smp_lock.h>
 #include "core.h"
 
 static u_int    *debug;
@@ -215,9 +216,8 @@ unlock:
         return ret;
 }
 
-static int
-mISDN_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
-    unsigned long arg)
+static long
+mISDN_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 {
         struct mISDNtimerdev    *dev = filep->private_data;
         int                     id, tout, ret = 0;
@@ -226,6 +226,7 @@ mISDN_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
         if (*debug & DEBUG_TIMER)
                 printk(KERN_DEBUG "%s(%p, %x, %lx)\n", __func__,
                     filep, cmd, arg);
+        lock_kernel();
         switch (cmd) {
         case IMADDTIMER:
                 if (get_user(tout, (int __user *)arg)) {
@@ -257,13 +258,14 @@ mISDN_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
         default:
                 ret = -EINVAL;
         }
+        unlock_kernel();
         return ret;
 }
 
 static const struct file_operations mISDN_fops = {
         .read           = mISDN_read,
         .poll           = mISDN_poll,
-        .ioctl          = mISDN_ioctl,
+        .unlocked_ioctl = mISDN_ioctl,
         .open           = mISDN_open,
         .release        = mISDN_close,
 };