1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index 0403622ae267..c9397c8ee97e 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/poll.h>
 #include <linux/module.h>
 #include <linux/serio.h>
@@ -81,9 +82,10 @@ static int serio_raw_open(struct inode *inode, struct file *file)
         struct serio_raw_list *list;
         int retval = 0;
 
+        lock_kernel();
         retval = mutex_lock_interruptible(&serio_raw_mutex);
         if (retval)
-                return retval;
+                goto out_bkl;
 
         if (!(serio_raw = serio_raw_locate(iminor(inode)))) {
                 retval = -ENODEV;
@@ -108,6 +110,8 @@ static int serio_raw_open(struct inode *inode, struct file *file)
 
 out:
         mutex_unlock(&serio_raw_mutex);
+out_bkl:
+        unlock_kernel();
         return retval;
 }