From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Sun, 2 May 2010 08:11:32 +0000 (-0300)
Subject: V4L/DVB: v4l2-dev: remove unnecessary lock around atomic clear_bit
X-Git-Tag: v2.6.35-rc1~480^2~37
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=dd0daf2a6fb6bec436a3ef68bd585ea09a2a54b7;p=karo-tx-linux.git

V4L/DVB: v4l2-dev: remove unnecessary lock around atomic clear_bit

No need to lock when unregistering the device: clear_bit is already an
atomic operation.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 65a7b30524ca..0ca7ec9ca902 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -600,9 +600,7 @@ void video_unregister_device(struct video_device *vdev)
 	if (!vdev || !video_is_registered(vdev))
 		return;
 
-	mutex_lock(&videodev_lock);
 	clear_bit(V4L2_FL_REGISTERED, &vdev->flags);
-	mutex_unlock(&videodev_lock);
 	device_unregister(&vdev->dev);
 }
 EXPORT_SYMBOL(video_unregister_device);