1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/char/toshiba.c b/drivers/char/toshiba.c
index 663cd15d7c78..f8bc79f6de34 100644
--- a/drivers/char/toshiba.c
+++ b/drivers/char/toshiba.c
@@ -68,7 +68,7 @@
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-
+#include <linux/smp_lock.h>
 #include <linux/toshiba.h>
 
 #define TOSH_MINOR_DEV 181
@@ -88,13 +88,13 @@ static int tosh_date;
 static int tosh_sci;
 static int tosh_fan;
 
-static int tosh_ioctl(struct inode *, struct file *, unsigned int,
+static long tosh_ioctl(struct file *, unsigned int,
         unsigned long);
 
 
 static const struct file_operations tosh_fops = {
         .owner          = THIS_MODULE,
-        .ioctl          = tosh_ioctl,
+        .unlocked_ioctl = tosh_ioctl,
 };
 
 static struct miscdevice tosh_device = {
@@ -252,8 +252,7 @@ int tosh_smm(SMMRegisters *regs)
 EXPORT_SYMBOL(tosh_smm);
 
 
-static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
-        unsigned long arg)
+static long tosh_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 {
         SMMRegisters regs;
         SMMRegisters __user *argp = (SMMRegisters __user *)arg;
@@ -275,13 +274,16 @@ static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
                                 return -EINVAL;
 
                         /* do we need to emulate the fan ? */
+                        lock_kernel();
                         if (tosh_fan==1) {
                                 if (((ax==0xf300) || (ax==0xf400)) && (bx==0x0004)) {
                                         err = tosh_emulate_fan(&regs);
+                                        unlock_kernel();
                                         break;
                                 }
                         }
                         err = tosh_smm(&regs);
+                        unlock_kernel();
                         break;
                 default:
                         return -EINVAL;