1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 61f0146e215..dbee8688f75 100644
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -232,7 +232,7 @@ ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
 }
 
 static int
-ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+ds1620_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         struct therm therm;
         union {
@@ -316,6 +316,18 @@ ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned
         return 0;
 }
 
+static long
+ds1620_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        int ret;
+
+        lock_kernel();
+        ret = ds1620_ioctl(file, cmd, arg);
+        unlock_kernel();
+
+        return ret;
+}
+
 #ifdef THERM_USE_PROC
 static int
 proc_therm_ds1620_read(char *buf, char **start, off_t offset,
@@ -344,7 +356,7 @@ static const struct file_operations ds1620_fops = {
         .owner          = THIS_MODULE,
         .open           = ds1620_open,
         .read           = ds1620_read,
-        .ioctl          = ds1620_ioctl,
+        .unlocked_ioctl = ds1620_unlocked_ioctl,
 };
 
 static struct miscdevice ds1620_miscdev = {