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authorHans Verkuil <hverkuil@xs4all.nl>2008-08-23 12:31:47 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 15:36:53 +0400
commit7d43cd53c851e3cf04d73108d4e7e25a1104c6f5 (patch)
tree4fcf2e3148065f1727b630deefef9612610bf789 /drivers/media/video/w9966.c
parent2f3d00250ae5b1d2727e2723da805290ec408503 (diff)
downloadlinux-7d43cd53c851e3cf04d73108d4e7e25a1104c6f5.tar.xz
V4L/DVB (8780): v4l: replace the last uses of video_exclusive_open/release
Handle the video_exclusive_open/release functionality inside the driver. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/w9966.c')
-rw-r--r--drivers/media/video/w9966.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c
index 2ff00bc5ad64..c635cffb1fb8 100644
--- a/drivers/media/video/w9966.c
+++ b/drivers/media/video/w9966.c
@@ -113,6 +113,7 @@ struct w9966_dev {
signed char contrast;
signed char color;
signed char hue;
+ unsigned long in_use;
};
/*
@@ -184,10 +185,27 @@ static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos);
+static int w9966_exclusive_open(struct inode *inode, struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct w9966_dev *cam = vdev->priv;
+
+ return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0;
+}
+
+static int w9966_exclusive_release(struct inode *inode, struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct w9966_dev *cam = vdev->priv;
+
+ clear_bit(0, &cam->in_use);
+ return 0;
+}
+
static const struct file_operations w9966_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = w9966_exclusive_open,
+ .release = w9966_exclusive_release,
.ioctl = w9966_v4l_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,