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/misc/legousbtower.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/usb/misc/legousbtower.c')

diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 3d4378fb4410..94e1b84134dd 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -82,6 +82,7 @@
 #include <linux/module.h>
 #include <linux/completion.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <linux/usb.h>
 #include <linux/poll.h>
@@ -345,6 +346,7 @@ static int tower_open (struct inode *inode, struct file *file)
 
 	dbg(2, "%s: enter", __func__);
 
+	lock_kernel();
 	nonseekable_open(inode, file);
 	subminor = iminor(inode);
 
@@ -430,6 +432,7 @@ unlock_exit:
 	mutex_unlock(&dev->lock);
 
 exit:
+	unlock_kernel();
 	dbg(2, "%s: leave, return value %d ", __func__, retval);
 
 	return retval;
-- 
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