From 8d115931622eb19a15f2633cb35dd2c4a66db255 Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sun, 1 May 2011 06:31:40 -0300
Subject: [PATCH] [media] cx88: don't use atomic_t for core->users
users is always read or written with core->lock held. A plain int is
simpler and faster.
Tested-by: Andi Huber <hobrom@gmx.at>
Tested-by: Marlon de Boer <marlon@hyves.nl>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/cx88/cx88-video.c | 5 +++--
drivers/media/video/cx88/cx88.h | 2 +-
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index b1f734dccea0..cef4f282e5aa 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -824,7 +824,7 @@ static int video_open(struct file *file)
call_all(core, tuner, s_radio);
}
- atomic_inc(&core->users);
+ core->users++;
mutex_unlock(&core->lock);
return 0;
@@ -922,7 +922,8 @@ static int video_release(struct file *file)
file->private_data = NULL;
kfree(fh);
- if(atomic_dec_and_test(&dev->core->users))
+ dev->core->users--;
+ if (!dev->core->users)
call_all(dev->core, core, s_power, 0);
mutex_unlock(&dev->core->lock);
diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h
index 9e8176ecf648..a399a8b086ba 100644
--- a/drivers/media/video/cx88/cx88.h
+++ b/drivers/media/video/cx88/cx88.h
@@ -389,7 +389,7 @@ struct cx88_core {
struct mutex lock;
/* various v4l controls */
u32 freq;
- atomic_t users;
+ int users;
int mpeg_users;
/* cx88-video needs to access cx8802 for hybrid tuner pll access. */