From 86266452f80545285c14e20a8024f79c4fb88a86 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oliver@neukum.org>
Date: Wed, 13 Jan 2010 15:33:15 +0100
Subject: USB: Push BKL on open down into the drivers

Straightforward push into the drivers to allow
auditing individual drivers separately

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/usb/class/usblp.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/usb/class/usblp.c')

diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 93b5f85d7ce..d53f9499f93 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -56,6 +56,7 @@
 #include <linux/slab.h>
 #include <linux/lp.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #undef DEBUG
 #include <linux/usb.h>
 
@@ -395,6 +396,7 @@ static int usblp_open(struct inode *inode, struct file *file)
 	if (minor < 0)
 		return -ENODEV;
 
+	lock_kernel();
 	mutex_lock (&usblp_mutex);
 
 	retval = -ENODEV;
@@ -434,6 +436,7 @@ static int usblp_open(struct inode *inode, struct file *file)
 	}
 out:
 	mutex_unlock (&usblp_mutex);
+	unlock_kernel();
 	return retval;
 }
 
-- 
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