diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 8de11deb5d1429dffb16febcd1d834623b59d0c5..c815a40e167f33f7427f0c908514e0e93b685b7d 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -125,6 +125,7 @@ static int skel_open(struct inode *inode, struct file *file)
 
 	/* save our object in the file's private structure */
 	file->private_data = dev;
+	mutex_unlock(&dev->io_mutex);
 
 exit:
 	return retval;