1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index 17e4eecaee73..47ce46bb5b01 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -77,7 +77,7 @@ static struct rio_usb_data rio_instance;
 static int open_rio(struct inode *inode, struct file *file)
 {
         struct rio_usb_data *rio = &rio_instance;
-
+        lock_kernel();
         mutex_lock(&(rio->lock));
 
         if (rio->isopen || !rio->present) {
@@ -91,6 +91,7 @@ static int open_rio(struct inode *inode, struct file *file)
         mutex_unlock(&(rio->lock));
 
         dev_info(&rio->rio_dev->dev, "Rio opened.\n");
+        unlock_kernel();
 
         return 0;
 }